CN207946601U - A kind of optical system and augmented reality equipment - Google Patents
A kind of optical system and augmented reality equipment Download PDFInfo
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- CN207946601U CN207946601U CN201820433505.0U CN201820433505U CN207946601U CN 207946601 U CN207946601 U CN 207946601U CN 201820433505 U CN201820433505 U CN 201820433505U CN 207946601 U CN207946601 U CN 207946601U
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Abstract
The utility model is related to augmented reality fields, provide a kind of optical system and augmented reality equipment, optical system includes elementary area, the first polarization unit and the second polarization unit set gradually along light path, elementary area is for emitting image light, first polarization unit is at least used to reflect image light, and the second polarization unit is for reflected image light and transmission extraneous light；Image light through the reflection of the second polarization unit and the extraneous light through the transmission of the second polarization unit reach the first polarization unit, and enter the eyes of user after the transmission of the first polarization unit；Due to the second polarization unit reflected image light and transmission extraneous light; it can not be traveled in external environment by the second polarization unit after the image light of the first polarization unit reflection reaches the second polarization unit; to which extraneous personnel can not watch the virtual image that elementary area generates, it is ensured that the privacy of user can be well protected.
Description
Technical field
The utility model is related to augmented reality fields, are to be related to a kind of optical system and enhancing is existing more specifically
Real equipment.
Background technology
With the development of science and technology, more and more display equipment is widely used in daily life and work is worked as
In, huge facility is brought for daily life and work, becomes the indispensable important tool of current people.Its
Middle augmented reality (Augmented Reality, abbreviation AR) technology is as a kind of a variety of by optics, electronics, software interactive etc.
The development that the new technique that field is combined also is advanced by leaps and bounds.
Augmented reality (Augmented Reality, abbreviation AR) is a kind of in real time by virtual image and reality scene progress
In conjunction with the technology showed, basic optical principle is to carry real world scene information and virtual image to human eye is incident simultaneously
The light of information, the image information transmitted on two optical paths merge at human eye so that human eye obtains real world simultaneously
The mixed image of scene information and virtual image, to achieve the effect that augmented reality.
In existing augmented reality scheme, while being interacted with the external world, the virtual image in augmented reality equipment
It can also be emitted to augmented reality device external, to which external personnel can see the content of user's viewing, can not be ensured
The privacy of user.
The above deficiency, has much room for improvement.
Utility model content
The purpose of this utility model is to provide a kind of optical systems, to solve the hidden of user existing in the prior art
Private is unable to get the technical issues of guarantee.
To achieve the above object, the technical solution adopted in the utility model is：A kind of optical system is provided, including along light path
It sets gradually：
Elementary area, for emitting image light；
First polarization unit is at least used to reflect described image light；
Second polarization unit, for reflecting described image light and transmission extraneous light；
Described image light through second polarization unit reflection and through the described outer of second polarization unit transmission
Portion's light reaches first polarization unit, and enters the eyes of user after first polarization unit transmission.
Further, first polarization unit includes being set gradually along light path：
First polarizing film, for transmiting the light with the first polarization state；
First part reflective semitransparent film, for carrying out part reflection and fractional transmission to light；
Described image light through first part reflective semitransparent film reflection reaches second polarization unit, through described second
The described image light of polarization unit reflection and the extraneous light transmitted through second polarization unit reach described first
Part reflective semitransparent film, and into the eyes of user after first part reflective semitransparent film transmission.
Further, second polarization unit includes：
Second polarizing film, for transmiting the light of light and reflection with the first polarization state with the second polarization state；
Described image light through second polarizing film reflection and the exterior light through second polarizing film transmission
Line reaches first part reflective semitransparent film, and enters the eyes of user after first part reflective semitransparent film transmission.
Further, second polarization unit further includes：
Third polarizing film is set to second polarizing film side opposite with first part reflective semitransparent film, for transmiting
Light with the first polarization state；
First polarization beat length device is set between second polarizing film and the third polarizing film, for light
Polarization state is controlled.
Further, the first polarization beat length device includes：
Liquid crystal layer is set between second polarizing film and the third polarizing film；
First controller is connect with the liquid crystal layer, the working condition for controlling the liquid crystal layer.
Further, second polarization unit includes：
4th polarizing film, for transmiting the light with the first polarization state；
Polarization state adjustment section is set between first part reflective semitransparent film and the 4th polarizing film, for adjusting light
Polarization state and part reflection and fractional transmission are carried out to light.
Further, the polarization state adjustment section includes：
Second part reflective semitransparent film is set between first part reflective semitransparent film and the 4th polarizing film；
First wave plate is set between first part reflective semitransparent film and second part reflective semitransparent film；
Second wave plate is set between second part reflective semitransparent film and the 4th polarizing film；
First wave plate and second wave plate are quarter-wave plate.
Further, first polarization unit includes being set gradually along light path：
Third wave plate, the third wave plate are quarter-wave plate；
5th polarizing film, for reflecting the light of light and transmission with the second polarization state with the first polarization state；
Second polarization is reached after the third wave plate through the described image light of the 5th polarizing film reflection
Unit.
Further, second polarization unit includes：
6th polarizing film, for transmiting the light with the first polarization state；
7th polarizing film is set between the 6th polarizing film and the third wave plate, has the first polarization for reflecting
The light of light and transmission with the second polarization state of state；
Second polarization beat length device is set between the 6th polarizing film and the 7th polarizing film, for light
Polarization state is controlled.
The purpose of this utility model, which also resides in, provides a kind of augmented reality equipment, including above-mentioned optical system.
A kind of advantageous effect of optical system provided by the utility model is：Since the second polarization unit can be used for reflecting
Image light and transmission extraneous light, thus after the image light of the first polarization unit reflection reaches the second polarization unit simultaneously
It cannot be traveled in external environment by the second polarization unit, while extraneous light can be laggard by the transmission of the second polarization unit
Enter into optical system, so that user can watch external environment image, and extraneous personnel can not watch image
The virtual image that unit generates, it is ensured that the privacy of user can be well protected.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram one for the optical system that the utility model embodiment provides；
Fig. 2 is the light channel structure schematic diagram two for the optical system that the utility model embodiment provides；
Fig. 3 is that structure when the first polarization beat length device of the optical system that the utility model embodiment provides does not work is shown
It is intended to；
Structural representation when Fig. 4 is the first polarization beat length device work for the optical system that the utility model embodiment provides
Figure；
Fig. 5 is the light channel structure schematic diagram three for the optical system that the utility model embodiment provides；
Fig. 6 is a kind of structural schematic diagram three of second polarization unit for the optical system that the utility model embodiment provides；
Fig. 7 is that structure when the second polarization beat length device of the optical system that the utility model embodiment provides does not work is shown
It is intended to；
Structural representation when Fig. 8 is the second polarization beat length device work for the optical system that the utility model embodiment provides
Figure.
Wherein, each reference numeral in figure：
1- elementary areas；101- image lights；
102- extraneous lights；The first polarization units of 2-；
The first polarizing films of 21-；The first part reflective semitransparent films of 22-；
23- third wave plates；The 5th polarizing films of 24-；
The second polarization units of 3-；The second polarizing films of 31-；
32- third polarizing films；33- the first polarization beat length devices；
The 4th polarizing films of 34-；35- polarization state adjustment sections；
The first wave plates of 351-；The second part reflective semitransparent films of 352-；
The second wave plates of 353-；The 6th polarizing films of 36-；
37- the second polarization beat length devices；The 7th polarizing films of 38-；
4- eyes.
Specific implementation mode
In order to make technical problem to be solved in the utility model, technical solution and advantageous effect be more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
Example is applied only to explain the utility model, is not used to limit the utility model.
It should be noted that when element is referred to as " being set to " another element, it can be directly on another element
Or it is connected on another element.When an element is known as " being connected to " another element, it can directly be connected
It is connected to another element or is indirectly connected on another element.In addition, term " first ", " second " are only used for description mesh
, it is not understood to indicate or imply relative importance or implicitly indicates the quantity of indicated technical characteristic.It limits as a result,
There is the feature of " first ", " second " to can explicitly or implicitly include one or more this feature surely.It is new in this practicality
In the description of type, the meaning of " plurality " is two or more, unless otherwise specifically defined.
Please refer to Fig.1 and Fig. 2, a kind of optical system, include polarized along the elementary area 1, first that light path is set gradually it is single
Member 2 and the second polarization unit 3, elementary area 1 are at least used for for emitting image light 101, the first polarization unit 2 by image
Light 101 reflects, and the second polarization unit 3 is for reflected image light 101 and transmission extraneous light 102；It is single through the second polarization
The image light 101 of 3 reflection of member and the extraneous light 102 through the transmission of the second polarization unit 3 reach the first polarization unit 2, and pass through
Enter the eyes 4 of user after the transmission of first polarization unit 2.
A kind of operation principle of optical system provided in this embodiment is as follows：
On the one hand, elementary area 1 is generated and transmitted by image light 101, and image light 101 reaches the first polarization unit 2 simultaneously
The second polarization unit 3 is reached after the reflection of the first polarization unit 2, the second polarization unit 3 reflects image light 101, warp
The image light 101 of second polarization unit 3 reflection returns to the first polarization unit 2, and enters after the transmission of the first polarization unit 2 and make
The eyes 4 of user, so that user can watch the virtual image that elementary area 1 generates.
On the other hand, extraneous light 102 enters after the transmission of the second polarization unit 3 in optical system, and reaches first partially
Shake unit 2, the eyes 4 of user is entered after the transmission of the first polarization unit 2, so that user can watch external rings
Border image.
When the image light 101 and extraneous light 102 that elementary area generates reach the eyes 4 of user, user
It can be seen that the image that virtual image and external environment image are overlapped mutually.
A kind of advantageous effect of optical system provided in this embodiment is：Since the second polarization unit 3 can be used for reflecting
Image light 101 and transmission extraneous light 102, to which the image light 101 through the reflection of the first polarization unit 2 reaches second partially
Shaking can not be traveled in external environment by the second polarization unit 3 after unit 3, while extraneous light 102 can pass through second
Polarization unit 3 enters after transmiting in optical system, so that user can watch external environment image, and extraneous people
Member can not watch the virtual image that elementary area 1 generates, it is ensured that the privacy of user can be well protected.
In the present embodiment, the first polarization state is different from the second polarization state, and the light being incident on polarizing film can divide
Solution is the light with the first polarization state and the light with the second polarization state.Preferably, the light with the first polarization state is S
Polarised light, the light with the second polarization state are P polarization light；Or the light with the first polarization state is P polarization light, has the
The light of two polarization states is S-polarization light.
In one embodiment, the first polarization unit 2 includes the first polarizing film 21 set gradually along light path and the first half
Anti- semi-permeable membrane 22, the first polarizing film 21 are used to transmit the light with the first polarization state (marking " P " for example, see in Fig. 2), the
One part reflective semitransparent film 22 is used to carry out part reflection and fractional transmission to light；Image light 101 is after the first polarizing film 21
The first part reflective semitransparent film 22 is reached, and the second polarization unit 3 is reached after the reflection of the first part reflective semitransparent film 22.
First polarizing film, 21 transmissive has the light of the first polarization state, while can reflect the light with the second polarization state
Line.After the image light 101 that elementary area 1 is generated and transmitted by reaches the first polarizing film 21, the image with the first polarization state
Light 101 reaches the first part reflective semitransparent film 22 after the transmission of the first polarizing film 21；The image reflected through the first part reflective semitransparent film 22
Light 101 reaches the second polarization unit 3, and returns to the first part reflective semitransparent film 22 after the reflection of the second polarization unit 3；Then it passes through again
The eyes 4 of user are reached after the transmission of first part reflective semitransparent film 22, at this time in the image light 101 of the eyes 4 of arrival user
It only include the image light 101 with the first polarization state.Extraneous light 102 enters optics after the transmission of the second polarization unit 3
System simultaneously reaches the first part reflective semitransparent film 22, then reaches the eyes 4 of user after the transmission of the first part reflective semitransparent film 22 again.The
The surface of one part reflective semitransparent film 22 can be plane, spherical surface, aspherical or free form surface, can be configured as needed, this
Place is not limited；The transflection ratio of first part reflective semitransparent film 22 can be configured as needed, be not limited herein.
Please refer to Fig.1 and Fig. 2, in one embodiment, the first polarization unit 2 include along light path set gradually first partially
Shake piece 21 and the first part reflective semitransparent film 22, and the first polarizing film 21 is used to transmit the light with the first polarization state；Second polarization is single
Member 3 includes the second polarizing film 31, and the second polarizing film 31 has the second polarization state (marking " S " for example, see in Fig. 2) for transmiting
Light and reflection with the first polarization state light；Through the second polarizing film 31 reflection image light 101 and through second partially
The piece 31 that shakes transmission extraneous light 102 reach the first part reflective semitransparent film 22, and through the first part reflective semitransparent film 22 transmission after enter make
The eyes of user.The surface of second polarizing film 31 can be plane, spherical surface, aspherical or free form surface, can as needed into
Row setting, is not limited herein.
After the image light 101 that elementary area 1 emits reaches the first polarizing film 21, the image light with the first polarization state
101 reach the first part reflective semitransparent film 22 after the transmission of the first polarizing film 21；The image light reflected through the first part reflective semitransparent film 22
101 reach the second polarizing film 31, since the second polarizing film 31 can reflect the light with the first polarization state, image light
101 return to the first part reflective semitransparent film 22 after the reflection of the second polarization unit 3；Then it is arrived after the transmission of the first part reflective semitransparent film 22 again
Up to the eyes 4 of user, it only includes the figure with the first polarization state to reach at this time in the image light 101 of the eyes 4 of user
As light 101.
When extraneous light 102 is by the second polarizing film 31, since the second polarizing film 31 can be transmitted with the second polarization state
Light and reflection with the first polarization state light, therefore in extraneous light 102 with the first polarization state extraneous light
102 are reflected, and optical system is entered after transmission for the extraneous light 102 with the second polarization state and to reach the first half anti-
Then semi-permeable membrane 22 reaches the eyes 4 of user after the transmission of the first part reflective semitransparent film 22, reaches the eyes of user at this time again
It only include the extraneous light 102 with the second polarization state in 4 extraneous light 102.
By the way that the first polarizing film 21 is arranged in the first polarization unit 2, while setting second is inclined in the second polarization unit 3
Shake piece 31 so that image light 101 can only reflect when reaching the second polarizing film 31, and can not transmit, thus can not
It is emitted in external environment, avoids the virtual image that external staff watches elementary area 1 to generate, effectively protect user
Privacy.
Further, the center overlapping of axles of the central shaft of the first polarizing film 21 and elementary area 1, in the first polarizing film 21
The central shaft of mandrel and the first part reflective semitransparent film 22 is at the first default angle, the central shaft and the second polarizing film of the first polarizing film 21
31 central shaft can be configured as needed at the second default angle, the first default angle and the second default angle, as long as
Ensure that the image light 101 reflected through the first part reflective semitransparent film 22 can reach the second polarizing film 31, and passes through the second polarizing film
The image light 101 of 31 reflections can reach the first part reflective semitransparent film 22, not be limited herein.Preferably, first is default
Angle is 45 °, and the second default angle is 90 °, i.e. the first polarizing film 21 and the second polarizing film 31 are mutually perpendicular to, at this time through the first half
The image light 101 that anti-semi-permeable membrane 22 reflects impinges perpendicularly on the second polarizing film 31.
Fig. 3 and Fig. 4 are please referred to, in one embodiment, the second polarization unit 3 includes the second polarizing film 31, further includes the
Three polarizing films 32 and the first polarization beat length device 33, third polarizing film 32 is set on the second polarizing film 31 and the first part reflective semitransparent film
22 opposite sides, the first polarization beat length device 33 are set between the second polarizing film 31 and third polarizing film 32.Third polarizing film
32 can transmit the light with the first polarization state, while can absorb or reflect the light with the second polarization state.First partially
Polarization state controller 33 is for controlling the polarization state of light, and when the first polarization beat length device 33 does not work, light passes through
Its polarization state does not change after first polarization beat length device 33；When the first polarization beat length device 33 works, have first
The light of polarization state becomes the light with the second polarization state after the first polarization beat length device 33, with the second polarization state
Light becomes the light with the first polarization state after the first polarization beat length device 33.The surface of third polarizing film 32 can be
Plane, spherical surface, aspherical or free form surface, can be configured, not be limited herein as needed.
Referring to Fig. 3, when the first polarization beat length device 33 does not work：When extraneous light 102 is by third polarizing film 32,
Since third polarizing film 32 can transmit the light with the first polarization state, the extraneous light 102 with the first polarization state
Optical system is entered after transmission and reaches the first polarization beat length device 33, it is external after the first polarization beat length device 33
Light 102 still has the first polarization state, and the extraneous light 102 with the first polarization state, which continues to propagate, reaches the second polarizing film
31；Since the second polarizing film 31 can transmit the light of light and reflection with the first polarization state with the second polarization state,
Therefore the extraneous light 102 with the first polarization state can be reflected by the second polarizing film 31, to reach the eyes of user
4, at this time user can not watch external environment image.
Referring to Fig. 4, when the first polarization beat length device 33 works：When extraneous light 102 is by third polarizing film 32, by
The light with the first polarization state can be transmitted in third polarizing film 32, therefore the extraneous light 102 with the first polarization state passes through
Optical system is entered after crossing transmission and reaches the first polarization beat length device 33, is changed into after the first polarization beat length device 33
Extraneous light 102 with the second polarization state, the extraneous light 102 with the second polarization state, which continues to propagate, reaches the second polarizing film
31；Since the second polarizing film 31 can transmit the light of light and reflection with the first polarization state with the second polarization state,
Therefore the extraneous light 102 with the second polarization state can reach the first part reflective semitransparent film 22 after the transmission of the second polarizing film 31, so
The eyes 4 for reaching user after the transmission of the first part reflective semitransparent film 22 again afterwards, reach the extraneous light of the eyes 4 of user at this time
It only include the extraneous light 102 with the second polarization state in 102.
Therefore, when the work of elementary area 1, the first polarization beat length device 33 do not work, user can only see virtual graph
As and can't see external environment image；When the work of elementary area 1, the work of the first polarization beat length device 33, user can be same
When see virtual image and external environment image.First polarization beat length device 33 and third polarizing film 32 are set, by first
The working condition of polarization beat length device 33 is adjusted, and can control whether extraneous light 102 can enter the eyes of user
4, so as to control when user can see virtual image as needed, when it can be seen that virtual image and external environment
The image of image superposition, use state can control, and occupation mode and usage scenario are more flexible.
Further, the first polarization beat length device 33 includes being set to liquid crystal between the second polarizing film 31 and third polarizing film 32
Layer and the first controller being connect with liquid crystal layer, the first controller are used to control the working condition of liquid crystal layer.When liquid crystal layer not work
When making, light its polarization state after liquid crystal layer does not change；When the control liquid crystal layer work of the first controller, have the
The light of one polarization state becomes the light with the second polarization state after liquid crystal layer, and the light with the second polarization state passes through liquid
Become the light with the first polarization state after crystal layer.First controller controls liquid crystal layer checker between different working condition
Response time is less than 20 milliseconds, therefore human eye has not felt as delay, improves user experience.
It should be understood that the first polarization beat length device 33 or other kinds of controller, be not limited on
The situation stated, is not limited herein.
Referring to Fig. 5, in one embodiment, the second polarization unit 3 includes the 4th polarizing film 34 and polarization state adjustment section
35, polarization state adjustment section 35 is set between the first part reflective semitransparent film 22 and the 4th polarizing film 34.4th polarizing film 34 is for transmiting
Light with the first polarization state, while can absorb or reflect the light with the second polarization state；Polarization state adjustment section 35 is used
In the polarization state of adjustment light and part reflection and fractional transmission are carried out to light, wherein the polarization state of adjustment light can be
Light with the first polarization state becomes the light with the second polarization state after polarization state adjustment section 35, or has second
The light of polarization state becomes the light with the first polarization state after polarization state adjustment section 35.The surface of 4th polarizing film 34 can
Think plane, spherical surface, aspherical or free form surface, can be configured, not be limited herein as needed.
After the image light 101 that elementary area 1 emits reaches the first polarizing film 21, only there is the image of the first polarization state
Light 101 reaches the first part reflective semitransparent film 22 after the transmission of the first polarizing film 21；The image reflected through the first part reflective semitransparent film 22
Light 101 reaches polarization state adjustment section 35, due to polarization state adjustment section 35 can adjust light polarization state and to light into
The reflection of row part and fractional transmission, therefore a part of image light 101 reflects back into the first half in polarization state adjustment section 35
Anti- semi-permeable membrane 22, a part of image light 101 occur transmission in polarization state adjustment section 35 and reach the 4th polarizing film 34, and image light
The polarization state of line 101 becomes have the second polarization state；Since the 4th polarizing film 34 can be absorbed or be reflected with the second polarization state
Light, therefore image light 101 can not be emitted to by the 4th polarizing film 34 in external environment, avoid external staff's viewing
The virtual image generated to elementary area 1, protects the privacy of user.
When extraneous light 102 is by four polarizing films 34, since the 4th polarizing film 34 can be transmitted with the first polarization state
Light, therefore the extraneous light 102 with the first polarization state entered in optical system after the transmission of the 4th polarizing film 34 and
Polarization state adjustment section 35 is reached, and the first part reflective semitransparent film 22, extraneous light 102 are reached after the transmission of polarization state adjustment section 35
Polarization state the second polarization state is become by the first polarization state；Then the extraneous light 102 with the second polarization state is anti-through the first half
Semi-permeable membrane 22 enters after transmiting in the eyes 4 of user, only includes in the extraneous light 102 of the eyes 4 of arrival user at this time
Extraneous light 102 with the second polarization state.
Further, polarization state adjustment section 35 include set gradually the first wave plate 351, the second part reflective semitransparent film 352 with
And second wave plate 353, the first wave plate 351 are located at close to the side of the first part reflective semitransparent film 22, the second wave plate 353 is located at close to the
The side of four polarizing films 34.Second part reflective semitransparent film 352 is used to carry out part reflection and fractional transmission to light, and surface can be with
For plane, spherical surface, aspherical or free form surface, it can be configured, not be limited herein as needed；Second part reflective semitransparent film
352 transflection ratio can be configured as needed, be not limited herein.First wave plate 351 and the second wave plate 353 are four points
One of wave plate, elliptically polarized light can be become after quarter-wave plate with the light of the first polarization state, elliptically polarized light is again
It is secondary to become the light with the second polarization state after quarter-wave plate；Or the light with the second polarization state passes through four
It can become elliptically polarized light after/mono- wave plate, elliptically polarized light can become with first partially after again passing by quarter-wave plate
The light of polarization state.
After the image light 101 that elementary area 1 emits reaches the first polarizing film 21, only there is the image of the first polarization state
Light 101 reaches the first part reflective semitransparent film 22 after the transmission of the first polarizing film 21；The image reflected through the first part reflective semitransparent film 22
Light 101 reaches the first wave plate 351, is then changed into after the first wave plate 351 after elliptically polarized light and reaches the second half anti-half
Permeable membrane 352；A part of image light 101 reflects at this time, and a part of image light 101 transmits, the figure reflected
The first wave plate 351 is returned to as light 101 and is changed into the image light 101 with the second polarization state after the first wave plate 351,
Image light 101 with the second polarization state continues to propagate to the first part reflective semitransparent film 22 and be transmitted through the first part reflective semitransparent film 22
In the eyes 4 for reaching user afterwards；The image light 101 transmitted reaches the second wave plate 353, after the second wave plate 353
It is changed into the image light 101 with the second polarization state, the image light 101 with the second polarization state continues to propagate to the 4th partially
Shake piece 34；Since the 4th polarizing film 34 can absorb or reflect the light with the second polarization state, there is the second polarization state
Image light 101 can not be emitted in external environment by the 4th polarizing film 34, avoid external staff and watch image list
The virtual image that member 1 generates, protects the privacy of user.
When extraneous light 102 is by four polarizing films 34, since the 4th polarizing film 34 can be transmitted with the first polarization state
Light, therefore the extraneous light 102 with the first polarization state entered in optical system after the transmission of the 4th polarizing film 34 and
The second wave plate 353 is reached, and is changed into elliptically polarized light after the second wave plate 353；Extraneous light 102 continues to propagate to second
Part reflective semitransparent film 352, and the first wave plate 351 is reached after the transmission of the second part reflective semitransparent film 352, and after the first wave plate 351
Its polarization state is changed into the second polarization state；Extraneous light 102 with the second polarization state continues to propagate to the first part reflective semitransparent film
22 and through the first part reflective semitransparent film 22 transmission after reach user eyes 4 in.
Referring to Fig. 6, in one embodiment, the second half can be set gradually on a surface of substrate of glass 354
Anti- semi-permeable membrane 352 and the first wave plate 351, set gradually the second wave plate 353 and the 4th on another surface of substrate of glass 354
Polarizing film 34, to obtain the second polarization unit 3, the production is simple and convenient, and compact-sized.It should be understood that the second polarization
Unit 3 can also make by other means, be not limited in above-mentioned situation.
Fig. 7 and Fig. 8 are please referred to, in one embodiment, the first polarization unit 2 includes the third wave set gradually along light path
Piece 23 and the 5th polarizing film 24, third wave plate 23 are quarter-wave plate, and the 5th polarizing film 24 can be reflected with the first polarization
The light of light and transmission with the second polarization state of state；Image light 101 through the reflection of the 5th polarizing film 24 passes through third wave
The second polarization unit 3 is reached after piece 23.Third wave plate 23 is parallel with the 5th polarizing film 24 and the central shaft of third wave plate 23 with
The central shaft of elementary area 1 presets angle at third, and it is preferably 45 ° that third, which presets angle,.The surface of 5th polarizing film 24 can be with
For plane, spherical surface, aspherical or free form surface, it can be configured, not be limited herein as needed.
The image light 101 that elementary area 1 emits arrives first at third wave plate 23, when image light 101 is natural light,
Natural light is remained as after third wave plate 23, when image light 101 has the first polarization state, after third wave plate 23
It is changed into elliptically polarized light；Image light 101 reaches the 5th polarizing film 24 after third wave plate 23, due to the 5th polarizing film 24
The light with the first polarization state can be reflected, therefore the image light 101 of the first polarization state is after the reflection of the 5th polarizing film 24
Third wave plate 23 is reached, and reaches the second polarization unit 3 after third wave plate 23, since the second polarization unit 3 can be with reflectogram
As light 101, therefore the image light 101 for reaching the second polarization unit 3 returns to third wave plate after the reflection of the second polarization unit 3
At 23, and the 5th polarizing film 24 is reached after third wave plate 23；Since the 5th polarizing film 24 can be transmitted with the second polarization
The light of state, therefore the part with the second polarization state enters user after the transmission of the 5th polarizing film 24 in image light 101
Eyes 4, thereby using person can watch elementary area 1 emit virtual image.
Extraneous light 102 enters after the transmission of the second polarization unit 3 in optical system, and reaches at third wave plate 23, passes through
The 5th polarizing film 24 is reached after third wave plate 23, and there is the 5th polarizing film 24 of part of the second polarization state in extraneous light 102
The eyes 4 for entering user after transmission, extraneous external environment image can be watched thereby using person.
Further, the second polarization unit 3 include set gradually the 6th polarizing film 36, the second polarization beat length device 37 with
And the 7th polarizing film 38, the 7th polarizing film 38 are provided close to the side of third wave plate 23；6th polarizing film 36, which can transmit, to be had
The light of first polarization state, while can absorb or reflect the light with the second polarization state.Second polarization beat length device 37 is used
It is controlled in the polarization state to light, when the second polarization beat length device 37 does not work, light passes through the second polarization beat length
Its polarization state does not change after device 37；When the second polarization beat length device 37 works, the light with the first polarization state passes through
Become the light with the second polarization state after crossing the second polarization beat length device 37, the light with the second polarization state is inclined by second
Become the light with the first polarization state after polarization state controller 37.7th polarizing film 38 can reflect the light with the first polarization state
Line, while the light with the second polarization state can be transmitted.The surface of 6th polarizing film 36 and the 7th polarizing film 38 can be flat
Face, spherical surface, aspherical or free form surface, can be configured, not be limited herein as needed.
The image light 101 that elementary area 1 emits arrives first at third wave plate 23, and the 5th is reached after third wave plate 23
Polarizing film 24, since the 5th polarizing film 24 can reflect the light with the first polarization state, the image light of the first polarization state
Line 101 reaches third wave plate 23 after the reflection of the 5th polarizing film 24, is changed into elliptically polarized light after third wave plate 23；It is oval
Polarised light propagates to the 7th polarizing film 38, since the 7th polarizing film 38 can reflect the light with the first polarization state, figure
As the part generation reflection with the first polarization state in light 101 and third wave plate 23 is returned to, is changed after third wave plate 23
For elliptically polarized light；Circularly polarized light propagates to the 5th polarizing film 24, since the 5th polarizing film 24 can be transmitted with the second polarization
The light of state, therefore the part with the second polarization state occurs to transmit and reach the eyes 4 of user in image light 101, from
And user can watch the virtual image that elementary area 1 emits.Since the 7th polarizing film 38 can be transmitted with second partially
The light of polarization state, therefore the part with the second polarization state occurs to transmit and reaches the second polarization beat length in image light 101
Device 37；When the second polarization beat length device 37 does not work, the image light 101 with the second polarization state passes through the second polarization state control
Device 37 processed retrodeviates polarization state and does not change, thus the image light 101 with the second polarization state continues to propagate to the 6th polarizing film
At 36, since the 6th polarizing film 36 can absorb or reflect the light with the second polarization state, with the second polarization state
Image light 101 can not avoid external staff and watch image list by being emitted in external environment at the 6th polarizing film 36
The virtual image that member 1 generates, protects the privacy of user.
Referring to Fig. 7, when the second polarization beat length device 37 does not work：When extraneous light 102 is by six polarizing films 36,
Since the 6th polarizing film 36 can transmit the light with the first polarization state, the extraneous light 102 with the first polarization state
Optical system is entered after transmission and reaches the second polarization beat length device 37, it is external after the second polarization beat length device 37
Light 102 still has the first polarization state, and the extraneous light 102 with the first polarization state continues to propagate to the 7th polarizing film 38；
Due to light of the 7th polarizing film 38 reflection with the first polarization state, the extraneous light 102 with the first polarization state can quilt
7th polarizing film 38 reflects, and to reach the eyes 4 of user, user can not watch external environment image at this time.
Referring to Fig. 8, when the second polarization beat length device 37 works：Portion with the first polarization state in extraneous light 102
Lease making enters optical system after crossing transmission and reaches the second polarization beat length device 37, turns after the second polarization beat length device 37
Become the extraneous light 102 with the second polarization state, the extraneous light 102 with the second polarization state continues to propagate to the 7th polarization
Piece 38；Since the 7th polarizing film 38 can transmit the light with the second polarization state, the exterior light with the second polarization state
Line 102 can reach third wave plate 23 after the transmission of the 7th polarizing film 38, be changed into elliptically polarized light after third wave plate 23, ellipse
Circularly polarized light propagates to the 5th polarizing film 24, since the 5th polarizing film 24 can transmit the light with the second polarization state,
The part with the second polarization state occurs to transmit and reach the eyes 4 of user in extraneous light 102, can be seen thereby using person
See the external environment image of external environment.
Therefore, when the work of elementary area 1, the second polarization beat length device 37 do not work, user can only see virtual graph
As and can't see external environment image；When elementary area 1 does not work, the work of the second polarization beat length device 37 when, user can be with
See external environment image simultaneously and can't see virtual image.Second polarization beat length device 37 and the 6th polarizing film 36 are set, led to
It crosses and the working condition of the second polarization beat length device 37 is adjusted, can control whether extraneous light 102 can enter use
The eyes 4 of person, so as to control when user can see virtual image as needed, when it can be seen that external environment figure
Picture, use state can control, and occupation mode and usage scenario are more flexible.
Further, the second polarization beat length device 37 includes the liquid being set between the 6th polarizing film 36 and the 7th polarizing film 38
Crystal layer and the second controller being connect with liquid crystal layer, second controller are used to control the working condition of liquid crystal layer.Work as liquid crystal layer
When not working, light its polarization state after liquid crystal layer does not change；When second controller control liquid crystal layer work, tool
There is the light of the first polarization state to become the light with the second polarization state after liquid crystal layer, the light with the second polarization state passes through
Become the light with the first polarization state after crossing liquid crystal layer.Second controller controls liquid crystal layer and alternately becomes between different working condition
The response time changed is less than 20 milliseconds, therefore human eye has not felt as delay, improves user experience.
It should be understood that the second polarization beat length device 37 or other kinds of controller, be not limited on
The situation stated, is not limited herein.
The purpose of the present embodiment, which also resides in, provides a kind of augmented reality equipment, including above-mentioned optical system.Due to second
Polarization unit 3 can be used for reflected image light 101 and transmission extraneous light 102, to the figure reflected through the first polarization unit 2
It can not be traveled in external environment by the second polarization unit 3 after reaching the second polarization unit 3 as light 101, while external
Light 102 enters after being transmitted by the second polarization unit 3 in optical system, so that user can watch outside
Portion's ambient image, and extraneous personnel can not watch the virtual image that elementary area 1 generates, it is ensured that the privacy of user can
It is well protected.
The above description is only the embodiments of the present invention, is not intended to limit the utility model, all in this practicality
All any modification, equivalent and improvement etc., should be included in the guarantor of the utility model made by within novel spirit and principle
Within the scope of shield.
Claims (10)
1. a kind of optical system, it is characterised in that：Include being set gradually along light path：
Elementary area, for emitting image light；
First polarization unit is at least used to reflect described image light；
Second polarization unit, for reflecting described image light and transmission extraneous light；
Described image light through second polarization unit reflection and the exterior light through second polarization unit transmission
Line reaches first polarization unit, and enters the eyes of user after first polarization unit transmission.
2. optical system as described in claim 1, it is characterised in that：First polarization unit includes being set gradually along light path
's：
First polarizing film, for transmiting the light with the first polarization state；
First part reflective semitransparent film, for carrying out part reflection and fractional transmission to light；
Described image light through first part reflective semitransparent film reflection reaches second polarization unit, is polarized through described second
It is anti-that the described image light of unit reflection and the extraneous light through second polarization unit transmission reach described the first half
Semi-permeable membrane, and into the eyes of user after first part reflective semitransparent film transmission.
3. optical system as claimed in claim 2, it is characterised in that：Second polarization unit includes：
Second polarizing film, for transmiting the light of light and reflection with the first polarization state with the second polarization state；
Described image light through second polarizing film reflection and the extraneous light through second polarizing film transmission arrive
Up to first part reflective semitransparent film, and into the eyes of user after first part reflective semitransparent film transmission.
4. optical system as claimed in claim 3, it is characterised in that：Second polarization unit further includes：
Third polarizing film is set to second polarizing film side opposite with first part reflective semitransparent film, has for transmiting
The light of first polarization state；
First polarization beat length device is set between second polarizing film and the third polarizing film, for the polarization to light
State is controlled.
5. optical system as claimed in claim 4, it is characterised in that：The first polarization beat length device includes：
Liquid crystal layer is set between second polarizing film and the third polarizing film；
First controller is connect with the liquid crystal layer, the working condition for controlling the liquid crystal layer.
6. optical system as claimed in claim 2, it is characterised in that：Second polarization unit includes：
4th polarizing film, for transmiting the light with the first polarization state；
Polarization state adjustment section is set between first part reflective semitransparent film and the 4th polarizing film, for adjusting the inclined of light
Polarization state and part reflection and fractional transmission are carried out to light.
7. optical system as claimed in claim 6, it is characterised in that：The polarization state adjustment section includes：
Second part reflective semitransparent film is set between first part reflective semitransparent film and the 4th polarizing film；
First wave plate is set between first part reflective semitransparent film and second part reflective semitransparent film；
Second wave plate is set between second part reflective semitransparent film and the 4th polarizing film；
First wave plate and second wave plate are quarter-wave plate.
8. optical system as described in claim 1, it is characterised in that：First polarization unit includes being set gradually along light path
's：
Third wave plate, the third wave plate are quarter-wave plate；
5th polarizing film, for reflecting the light of light and transmission with the second polarization state with the first polarization state；
Second polarization unit is reached after the third wave plate through the described image light of the 5th polarizing film reflection.
9. optical system as claimed in claim 8, it is characterised in that：Second polarization unit includes：
6th polarizing film, for transmiting the light with the first polarization state；
7th polarizing film is set between the 6th polarizing film and the third wave plate, for reflecting with the first polarization state
The light of light and transmission with the second polarization state；
Second polarization beat length device is set between the 6th polarizing film and the 7th polarizing film, for the polarization to light
State is controlled.
10. a kind of augmented reality equipment, it is characterised in that：Including claim 1~9 any one of them optical system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820433505.0U CN207946601U (en) | 2018-03-28 | 2018-03-28 | A kind of optical system and augmented reality equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820433505.0U CN207946601U (en) | 2018-03-28 | 2018-03-28 | A kind of optical system and augmented reality equipment |
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| CN207946601U true CN207946601U (en) | 2018-10-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387942A (en) * | 2018-03-28 | 2019-02-26 | 深圳惠牛科技有限公司 | A kind of optical system and augmented reality equipment |
| CN110286489A (en) * | 2019-06-26 | 2019-09-27 | 联想(北京)有限公司 | Wearable device |
| CN111158150A (en) * | 2020-02-10 | 2020-05-15 | Oppo广东移动通信有限公司 | Lens assembly and head-mounted display device |
| CN111458879A (en) * | 2020-04-21 | 2020-07-28 | Oppo广东移动通信有限公司 | Optical assembly and head-mounted display device |
| CN111527440A (en) * | 2018-12-04 | 2020-08-11 | 京东方科技集团股份有限公司 | Display panel, display device and display method |
| WO2021197062A1 (en) * | 2020-03-31 | 2021-10-07 | 优奈柯恩(北京)科技有限公司 | Optical apparatus and head-mounted device |
| US11385463B1 (en) | 2019-09-18 | 2022-07-12 | Apple Inc. | Display device using active shutter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387942A (en) * | 2018-03-28 | 2019-02-26 | 深圳惠牛科技有限公司 | A kind of optical system and augmented reality equipment |
| CN109387942B (en) * | 2018-03-28 | 2024-05-10 | 深圳惠牛科技有限公司 | Optical system and augmented reality equipment |
| CN111527440A (en) * | 2018-12-04 | 2020-08-11 | 京东方科技集团股份有限公司 | Display panel, display device and display method |
| US11543565B2 (en) | 2018-12-04 | 2023-01-03 | Beijing Boe Technology Development Co., Ltd. | Display panel, display device and display method |
| CN110286489A (en) * | 2019-06-26 | 2019-09-27 | 联想(北京)有限公司 | Wearable device |
| US11385463B1 (en) | 2019-09-18 | 2022-07-12 | Apple Inc. | Display device using active shutter |
| CN111158150A (en) * | 2020-02-10 | 2020-05-15 | Oppo广东移动通信有限公司 | Lens assembly and head-mounted display device |
| WO2021197062A1 (en) * | 2020-03-31 | 2021-10-07 | 优奈柯恩(北京)科技有限公司 | Optical apparatus and head-mounted device |
| CN111458879A (en) * | 2020-04-21 | 2020-07-28 | Oppo广东移动通信有限公司 | Optical assembly and head-mounted display device |
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