CN105717643A - Reflective type virtual reality optical system - Google Patents
Reflective type virtual reality optical system Download PDFInfo
- Publication number
- CN105717643A CN105717643A CN201610232245.6A CN201610232245A CN105717643A CN 105717643 A CN105717643 A CN 105717643A CN 201610232245 A CN201610232245 A CN 201610232245A CN 105717643 A CN105717643 A CN 105717643A
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- Prior art keywords
- lens
- optical system
- virtual reality
- diaphragm
- reflecting element
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The invention discloses a reflective type virtual reality optical system which comprises a diaphragm (100).A first lens (1) which is fixed relative to the diaphragm (100) and a second lens (2) which can move in a front-rear mode relative to the diaphragm (100) are arranged on one side of the diaphragm (100).A reflecting element (3) and a display screen (200) are arranged on one side of the second lens (2) far away from the diaphragm (100), light emitted by the display screen (200) is reflected through the reflecting element (3) to enter the second lens (2) and the first lens (1) and then reaches the diaphragm (100), the first lens (1) is a bi-convex aspheric lens having positive focal power, the second lens (2) is a meniscus aspheric lens having negative focal power, and the focal power of the reflecting element (3) is 0.The reflective type virtual reality optical system is simple in structure, high in definition, large in field angle, small in size and light in weight.
Description
[technical field]
The present invention relates to a kind of optical system, more specifically a kind of reflective virtual reality optical system.
[background technology]
Current virtual reality (VirtualReality, it is called for short VR) and augmented reality (AugmentedReality is called for short AR) the entrance fast-developing phase, these devices are arranged on the head of observer, therefore it must compact and lightweight, to alleviate the load of observer.For VR system, big visual field is considerable, only big visual field, observer could the dynamic image of more absorbed observation high-quality, owing to being the relation of restriction mutually between the visual field of VR system, exit pupil diameter, focal length three, reach big visual field, big exit pupil diameter and short focus extremely difficult simultaneously.For this, lens set and special lens scheme are the development trends of following VR system.For requiring increasingly higher VR field, it is necessary to picture is apparent, the product of Consumer's Experience more high-quality.
Therefore, the present invention arises at the historic moment.
[summary of the invention]
The present invention seeks to overcome the deficiencies in the prior art, it is provided that a kind of simple in construction, definition are high, and the angle of visual field is big, volume reflective virtual reality optical system little, lightweight.
The present invention is achieved by the following technical solutions:
A kind of reflective virtual reality optical system, it is characterized in that: include diaphragm 100, described diaphragm 100 side is provided with the first lens 1 and its second lens 2 that can move forward and backward relative that its position is fixing relatively, the second described lens 2 are provided with reflecting element 3 and display screen 200 away from diaphragm 100 side, the light that described display screen 200 sends arrives diaphragm 100 after reflecting through reflecting element 3 and entering the second lens 2 and the first lens 1, the described lenticular non-spherical lens that the first lens 1 are positive light coke, the described falcate non-spherical lens that the second lens 2 are negative power, the focal power of described reflecting element 3 is 0.
Reflective virtual reality optical system as above, it is characterised in that: from described diaphragm 100 to reflecting element 3 direction, first of described first lens 1 be hyperbola aspheric surface, second be oval aspheric surface；First of described second lens 2 is circular aspheric, second for oblate aspheric surface.
Reflective virtual reality optical system as above, it is characterised in that: described reflecting element 3 is plane mirror or reflecting prism or reflective free form surface.
Reflective virtual reality optical system as above, it is characterised in that: described reflecting element 3 is coated with laminated reflective film.
Reflective virtual reality optical system as above, it is characterised in that: the first described lens 1 and the second lens 2 are plastic lens.
Reflective virtual reality optical system as above, it is characterised in that: described display screen 200 is LCDs.
Reflective virtual reality optical system as above, it is characterised in that: the aspherical surface shape of first described lens the 1, second lens 2 meets below equation: In formula, parameter c is the curvature corresponding to radius, and y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient；When k-factor is less than-1, the face sigmoid curves of lens is hyperbola, and when k-factor is equal to-1, the face sigmoid curves of lens is parabola；When k-factor is between-1 to 0, the face sigmoid curves of lens is oval, and when k-factor is equal to 0, the face sigmoid curves of lens is circular, and when k-factor is more than 0, the face sigmoid curves of lens is oblate；α1To α8Represent the coefficient corresponding to each radial coordinate respectively.
Compared with prior art, the present invention has the following advantages:
1, the angle of visual field of the present invention is very big, and the angle of visual field can reach 120 °, and 3D effect becomes apparent from, and has perfect impression on the spot in person during viewing image.
2, the optical system of the present invention person that can be suitable for total experience, it is possible to carrying out regulating diopter by regulating the position of the second lens, any user, such as through regulating diopter, sees whole picture.
3, the present invention reasonably distributes amplification, distorts only small, and after image planes are amplified, sense of reality is guaranteed, and more meets the requirement of virtual reality.
4, first lens of the present invention and the second lens all adopt glass lens, compact conformation, and volume is only small, and system is light, and the weight of whole finished goods is less than 250g, and observer wears as snug as a bug in a rug.
5, the Entry pupil diameters of the present invention is very big, and the brightness of image of display does not significantly decay, and definition is very high, and picture is uniform, and no matter how eyes rotate, and can both see whole picture clearly, it is not easy to cause observer's visual fatigue.
[accompanying drawing explanation]
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is optical system light path figure of the present invention.
[detailed description of the invention]
Below in conjunction with accompanying drawing, the invention will be further described:
A kind of reflective virtual reality optical system, including diaphragm 100, described diaphragm 100 side is provided with the first lens 1 and its second lens 2 that can move forward and backward relative that its position is fixing relatively, the second described lens 2 are provided with reflecting element 3 and display screen 200 away from diaphragm 100 side, the light that described display screen 200 sends arrives diaphragm 100 after reflecting through reflecting element 3 and entering the second lens 2 and the first lens 1, the described lenticular non-spherical lens that the first lens 1 are positive light coke, the described falcate non-spherical lens that the second lens 2 are negative power, the focal power of described reflecting element 3 is 0.When optical system of the present invention uses, light is reverse propagation, actual light path is the light that liquid crystal micro display screen 200 sends, first pass through reflecting element 3 and be reflected into the second lens 2, it is then passed through the second lens 2 and is transmitted into the first lens 1, eventually passing the first lens 1 transmission and arrive diaphragm 100 place, diaphragm 100 is observer's eyes.
In order to design conveniently, in design, eyes can be used as perfect lens, designs according to the thinking of light forward-propagating simultaneously, and the diaphragm in design system is observer.The first described lens 1 are plastic aspherical element plus lens, make all light by diaphragm 100 aperture can enter whole optical system smoothly, achieve the big angle of visual field, the angle of visual field can reach 120 °, realize obvious 3D effect, first lens 1 can adopt low-index material, and focal power is relatively big, mainly assume responsibility for the effect that image amplifies and image throwing is remote.
The focal power of the first described lens 1 is just, and maintains static relative to diaphragm 100；The focal power of the second described lens 2 moves forward and backward for negative and energy diaphragm 100 relatively.Therefore, utilizing human eye image-forming principle, when myopia user uses, picture needs to move to eyes direction, regulates the position of the second lens 2, compensates the picture moving amount caused by myopia so that optical system can focus on display screen 200 all the time.Utilize light path principle of reversibility, the light that display screen 200 sends also is able to enter human eye, focus on the retina, the people of different diopters, as long as the second lens 2 being adjusted suitable position, it becomes possible to see picture, it is achieved the internal focusing of optical system, diopter adjustment, suitable in total experience person, improve product on the market and be only used for the limitation of twenty-twenty vision user.
Described reflecting element 3 can be plane mirror, it is also possible to being reflecting prism or reflective free form surface, described reflecting element 3 is coated with laminated reflective film.According to light forward-propagating mentality of designing, the light cast out by the second lens 2 is fully reflective by reflecting element 3, enters image planes and display screen 200.Owing to the focal power of reflecting element 3 is 0, itself will not produce aberration, without the distribution affecting whole optical aberration, additionally, reflecting element 3 makes the image planes position of optical system change, transfer to the side of the first lens 1 and the second lens 2, be so greatly reduced the length of whole optical system, structure become compact lightly.
The first described lens 1 adopt the plastic aspherical element plus lens of low-refraction height abbe number, the second described lens 2 adopt the plastic aspherical element minus lens of high-refractivity and low-dispersion, positive and negative lens with the use of, the negative spherical aberration that plus lens produces just has compensated for the positive spherical aberration that minus lens produces, and spherical aberration and the sine of well having corrected optical system are poor.High chromatic dispersion material and the collocation of low chromatic dispersion material, can not only the axial chromatic aberration of correction system, additionally it is possible to the chromatic longitudiinal aberration of correction system, it is ensured that the image sharpness of system and color reducibility.The first lens and the second lens in optical system are used separately, it is possible to well correct the curvature of field and the distortion of optical system.
From described diaphragm 100 to reflecting element 3 direction, first of described first lens 1 be hyperbola aspheric surface, second be oval aspheric surface；First of described second lens 2 is circular aspheric, second for oblate aspheric surface.Whole optical system have employed four sides aspheric surface, and aspheric surface not only itself produces only small aberration, also can well balance the aberration of whole optical system so that there is at a relatively high resolution at the image plane center of optical system and edge.
The aspherical surface shape of first described lens the 1, second lens 2 meets below equation:In formula, parameter c is the curvature corresponding to radius, and y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient；When k-factor is less than-1, the face sigmoid curves of lens is hyperbola, and when k-factor is equal to-1, the face sigmoid curves of lens is parabola；When k-factor is between-1 to 0, the face sigmoid curves of lens is oval, and when k-factor is equal to 0, the face sigmoid curves of lens is circular, and when k-factor is more than 0, the face sigmoid curves of lens is oblate；α1To α8Represent the coefficient corresponding to each radial coordinate respectively.
The present invention the first lens the 1, second lens 2 and reflecting element 3 all use common plastic material, effectively control cost, alleviate the weight of system.Adopt wide spectrum during design, and the theoretical resolution of design is far above being actually needed value, it is ensured that image sharpness and color reducibility.
Claims (7)
1. a reflective virtual reality optical system, it is characterized in that: include diaphragm (100), described diaphragm (100) side is provided with the first lens (1) and relative the second lens (2) that it can move forward and backward that its position is fixing relatively, described the second lens (2) are provided with reflecting element (3) and display screen (200) away from diaphragm (100) side, the light that described display screen (200) sends arrives diaphragm (100) after entering the second lens (2) and the first lens (1) through reflecting element (3) reflection, the lenticular non-spherical lens that described the first lens (1) are positive light coke, the falcate non-spherical lens that described the second lens (2) are negative power, the focal power of described reflecting element (3) is 0.
2. reflective virtual reality optical system according to claim 1, it is characterized in that: from described diaphragm (100) to reflecting element (3) direction, first of described first lens (1) be hyperbola aspheric surface, second be oval aspheric surface；First of described second lens (2) is circular aspheric, second for oblate aspheric surface.
3. reflective virtual reality optical system according to claim 1 and 2, it is characterised in that: described reflecting element (3) is plane mirror or reflecting prism or reflective free form surface.
4. reflective virtual reality optical system according to claim 1 and 2, it is characterised in that: described reflecting element (3) is coated with laminated reflective film.
5. reflective virtual reality optical system according to claim 1 and 2, it is characterised in that: described the first lens (1) and the second lens (2) they are plastic lens.
6. reflective virtual reality optical system according to claim 1 and 2, it is characterised in that: described display screen (200) is LCDs.
7. reflective virtual reality optical system according to claim 1, it is characterised in that: described the first lens (1), the aspherical surface shape of the second lens (2) meet below equation: In formula, parameter c is the curvature corresponding to radius, and y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient；When k-factor is less than-1, the face sigmoid curves of lens is hyperbola, and when k-factor is equal to-1, the face sigmoid curves of lens is parabola；When k-factor is between-1 to 0, the face sigmoid curves of lens is oval, and when k-factor is equal to 0, the face sigmoid curves of lens is circular, and when k-factor is more than 0, the face sigmoid curves of lens is oblate；α1To α8Represent the coefficient corresponding to each radial coordinate respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610232245.6A CN105717643A (en) | 2016-04-13 | 2016-04-13 | Reflective type virtual reality optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610232245.6A CN105717643A (en) | 2016-04-13 | 2016-04-13 | Reflective type virtual reality optical system |
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| CN105717643A true CN105717643A (en) | 2016-06-29 |
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| CN201610232245.6A Pending CN105717643A (en) | 2016-04-13 | 2016-04-13 | Reflective type virtual reality optical system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291939A (en) * | 2016-09-30 | 2017-01-04 | 中国科学院长春光学精密机械与物理研究所 | A kind of virtual reality display optical system |
| CN107092078A (en) * | 2017-06-27 | 2017-08-25 | 中山联合光电科技股份有限公司 | A kind of reflective panorama optical imaging system |
| CN107942517A (en) * | 2018-01-02 | 2018-04-20 | 京东方科技集团股份有限公司 | A kind of VR wears display device and its display methods |
| WO2020078185A1 (en) * | 2018-10-15 | 2020-04-23 | 深圳市绎立锐光科技开发有限公司 | Illumination device and illumination system |
| CN113866982A (en) * | 2021-09-24 | 2021-12-31 | 合肥视涯技术有限公司 | Near-to-eye display optical module and VR display equipment |
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| US5576887A (en) * | 1995-06-22 | 1996-11-19 | Honeywell Inc. | Head gear display system using off-axis image sources |
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| US5576887A (en) * | 1995-06-22 | 1996-11-19 | Honeywell Inc. | Head gear display system using off-axis image sources |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291939A (en) * | 2016-09-30 | 2017-01-04 | 中国科学院长春光学精密机械与物理研究所 | A kind of virtual reality display optical system |
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| CN107092078A (en) * | 2017-06-27 | 2017-08-25 | 中山联合光电科技股份有限公司 | A kind of reflective panorama optical imaging system |
| CN107942517A (en) * | 2018-01-02 | 2018-04-20 | 京东方科技集团股份有限公司 | A kind of VR wears display device and its display methods |
| CN107942517B (en) * | 2018-01-02 | 2020-03-06 | 京东方科技集团股份有限公司 | VR head-mounted display device and display method thereof |
| WO2020078185A1 (en) * | 2018-10-15 | 2020-04-23 | 深圳市绎立锐光科技开发有限公司 | Illumination device and illumination system |
| CN111059488A (en) * | 2018-10-15 | 2020-04-24 | 深圳市绎立锐光科技开发有限公司 | Lighting device and lighting system |
| CN111059488B (en) * | 2018-10-15 | 2022-03-15 | 深圳市绎立锐光科技开发有限公司 | Lighting device and lighting system |
| CN113866982A (en) * | 2021-09-24 | 2021-12-31 | 合肥视涯技术有限公司 | Near-to-eye display optical module and VR display equipment |
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Application publication date: 20160629 |