CN108681400A - A kind of eyeball tracking device based on multilayer free form surface optical waveguide - Google Patents
A kind of eyeball tracking device based on multilayer free form surface optical waveguide Download PDFInfo
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- CN108681400A CN108681400A CN201810454738.3A CN201810454738A CN108681400A CN 108681400 A CN108681400 A CN 108681400A CN 201810454738 A CN201810454738 A CN 201810454738A CN 108681400 A CN108681400 A CN 108681400A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 233
- 210000005252 bulbus oculi Anatomy 0.000 title claims abstract description 83
- 238000003384 imaging method Methods 0.000 claims abstract description 58
- 238000010276 construction Methods 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- 210000000887 face Anatomy 0.000 claims description 5
- 230000011514 reflex Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005457 optimization Methods 0.000 abstract description 6
- 230000010354 integration Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 10
- 230000002708 enhancing effect Effects 0.000 description 6
- 239000006117 anti-reflective coating Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 210000001508 eye Anatomy 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 210000001747 pupil Anatomy 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/013—Eye tracking input arrangements
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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
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
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- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
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Abstract
The present invention proposes a kind of eyeball tracking device based on multilayer free form surface optical waveguide, including：Eyeglass, it is made of the different curved surface optical waveguide superposition of multilayer refractive index, the wherein different curved surface optical waveguide of multilayer refractive index is according to including first layer optical waveguide, second layer optical waveguide and third layer optical waveguide successively from the near to the distant with the distance between eyeball when wearing, the refractive index of first layer optical waveguide and third layer optical waveguide is all higher than the refractive index of airspace, and the refractive index of first layer optical waveguide is more than the refractive index of second layer optical waveguide；Infrared light supply is set to the designated position on the circumferential profile of eyeglass；Ocular imaging sensor is set to the side of eyeglass.Technical solution through the invention improves eyeball tracking locating speed, optimization tracking effect in tracking effect.On product form, the integration of ocular imaging sensor (including camera cmos element) and optical waveguide components is realized.
Description
Technical field
The present invention relates to eyeball tracking technical field, in particular to a kind of based on multilayer free form surface optical waveguide
Eyeball tracking device.
Background technology
Eyeball tracking technology is a scientific application technology, when according to the changing features on eyeball and eyeball periphery carry out with
Track, second is that according to iris angle change into line trace, third, actively projecting the light beams such as infrared ray to iris to extract feature.
Either any algorithm is required for being acquired the physiologic images of eyeball.In current equipment, eyeball number
According to acquisition, for example ocular imaging sensor is fixed on to the edge or outside of video glass visible angle, or by infrared light supply
Group is placed on the frame of eyeglass surrounding, and image sensor module is positioned on mainboard, is had the following defects：
1) eyeball image is shot to the camera of eyeball by side so that the image collected is tiltedly to be imaged, can influence eye
The effect of ball tracking；
2) it in order to correct error, needs repeatedly to demarcate repeatedly, causes user experience very poor；
3) ocular imaging sensor is detached with eyeglass, non-integral structure, is chased after if causing final products that eyeball is added
Track function, it is necessary to for per the preposition installation of money product.
Invention content
In order to solve the above-mentioned technical problem, the technical solution of the first aspect of the present invention proposes a kind of free based on multilayer
The eyeball tracking device of curved surface optical waveguide, including：
Eyeglass is made of, the different curved surface optical waveguide of multilayer refractive index the different curved surface optical waveguide superposition of multilayer refractive index
According to including first layer optical waveguide, second layer optical waveguide and third layer light successively from the near to the distant with the distance between eyeball when wearing
The refractive index of waveguide, first layer optical waveguide and third layer optical waveguide is all higher than the refractive index of airspace, first layer optical waveguide
Refractive index is more than the refractive index of second layer optical waveguide；Infrared light supply is set to the designated position on the circumferential profile of eyeglass；Eyeball
Imaging sensor is set to the side of eyeglass, wherein after eyeball tracking device is worn, the infrared light of infrared light supply transmitting
After ocular reflex, into first layer optical waveguide, and in the outer surface of first layer optical waveguide and first layer optical waveguide and the
After multiple reflections occur between the interface of two layers of optical waveguide, it is transmitted to ocular imaging sensor and realizes ocular imaging.
In the technical scheme, by be arranged multilayer free form surface optical waveguide eyeball tracking device, it can be achieved that eyeball at
As the integration of sensor (including camera cmos element) and optical waveguide components, it is low to solve eyeball tracking package equipment integrated level
The problem of, meanwhile, it takes the front directly to eyeball state to shoot, eyeball tracking locating speed, optimization tracking effect can be improved.
In addition, the eyeball tracking device in above-described embodiment provided by the invention can also have following supplementary technology special
Sign：
In the above-mentioned technical solutions, it is preferable that second layer curved surface optical waveguide is to be superimposed by least one set of light film, one group of light film
It is superimposed and constitutes including the different sub-light film of at least two refractive index, wherein for each group of light film, close to first layer optical waveguide
The refractive index of sub-light film is less than the refractive index of the sub-light film far from first layer optical waveguide.
In the technical scheme, eyeball tracking device can be by infrared light supply, multilayer free form surface optical waveguide, ocular imaging
Sensor is constituted, and infrared light supply includes two infrared light supplies, and the light wave that ocular reflex infrared light supply is sent out is sensed for ocular imaging
Device capture imaging.Multilayer free form surface optical waveguide is made of the different curved surface optical waveguide of multilayer refractive index, wherein near eyeball
The first layer optical waveguide in region uses high-index material, refractive index n1, one end far from eyeball is third layer optical waveguide,
Its refractive index is n3, the refractive index n of airspace0It indicates.Second layer light between first layer optical waveguide and third layer optical guided wave
Waveguide is free form surface Anti-reflective coating, makes the reflecting light interference enhancing for a certain wavelength that infrared light supply sends out, second layer optical waveguide
It is alternately made of the different material of at least two layers of refractive index, refractive index is followed successively by from first layer optical guided wave to third layer optical guided wave
n21、n22, in first layer optical waveguide, second layer optical waveguide, third layer optical waveguide and airspace, contact arbitrarily between the two
Face can be free form surface, and ocular imaging sensor captures the infrared waves conducted through multilayer free form surface optical waveguide, obtains eye
Ball watches eyeball image when different spatial attentively, wherein it is freely bent that the cmos element in ocular imaging sensor is close to multilayer
Face optical waveguide placement, infrared light supply and ocular imaging sensor are located at the side of multilayer free form surface optical waveguide.
Wherein, the relationship between each refractive index is as follows：n1>n0, n1>n21, n21<n22And n3>n0。
The refractive index n of first layer optical waveguide1More than the refractive index n of airspace0, it is ensured that the infrared light of ocular reflex is always
It is transmissive to enter in first layer optical waveguide, and when infrared light travels to first layer optical waveguide-airspace interface, it is as more as possible
Ground is totally reflected, and second layer optical waveguide has low-refraction n in the first layer material of nearly first layer optical waveguide21, second layer material
Material has high refractive index n22, and the refractive index n of first layer optical waveguide1First layer light waveguide-layer close more than in second layer optical waveguide
Refractive index n21, the thickness and refractive index of layers of material in second layer optical waveguide are chosen on demand, it is relevant to meet infrared external reflection light wave
Enhancing condition, and so that the cirtical angle of total reflection, which occurs, in first layer optical waveguide-second layer optical waveguide interface reflected light line uses up
May be small, the infrared light of higher energy, which is tied in first layer optical waveguide, to be transmitted, until being transferred to cmos element.
Via the infrared light that human eye reflects, by airspace-first layer optical waveguide interface, (i.e. first layer optical waveguide is outer
Surface) enter first layer optical waveguide after, first on first layer optical waveguide-second layer optical waveguide interface occur reflection and transmission,
The light wave reflected on first layer optical waveguide-second layer optical waveguide interface, since the effect of free form surface Anti-reflective coating occurs
Interference enhancing, it is then multiple between first layer optical waveguide-airspace and first layer optical waveguide-second layer optical waveguide interface
Transmitting, until being transferred to cmos element, using pupil, iris for this different characteristic of the reflectivity of infrared light, CMOS is photosensitive
Imaging, and then can judge the field range corresponding to user's central fovea visual field by the user eyeball image of acquisition.
In any of the above-described technical solution, it is preferable that second layer curved surface optical waveguide is 1-D photon crystal layer.
Second layer optical waveguide can be 1-D photon crystal material, in the biography for being oriented to third layer optical waveguide from first layer light wave
On defeated direction, the light of infrared band is reflected.
In addition, by Fresnel equation (principle：When light from it is a kind of with refractive index be η 1 medium to another kind have reflect
When the medium that rate is η 2 is propagated, the reflection and refraction of light may occur simultaneously in the intersection (commonly referred to as interface) of the two)
It is found that the refractive index n of optimization first layer optical waveguide1With first layer optical waveguide-airspace, first layer optical waveguide-second layer light
Electric field can be improved in first layer optical waveguide-second layer optical waveguide interface reflected optical power, Jin Erti in waveguide interface angle of incidence of light
High imaging quality, wherein incidence angle can be realized by changing first layer optical waveguide-second layer optical waveguide surface physics shape.
In any of the above-described technical solution, it is preferable that first layer optical waveguide and the interface of second layer optical waveguide are configured to
The the first composite construction face formed is combined with more folding faces by cambered surface；Infrared light supply is respectively arranged at eyeglass with ocular imaging sensor
Both sides, the side fitting of ocular imaging sensor and corresponding eyeglass is arranged.
In any of the above-described technical solution, it is preferable that first layer optical waveguide and the interface of second layer optical waveguide are configured to
By trapezoidal concave surface and inverted trapezoidal convex surface along the second composite construction face that the width structural grain of eyeglass is cross-linked to form；Eyeball at
As there are two sensor tools, and the both sides of eyeglass are respectively arranged at, ocular imaging sensor is bonded with the side of corresponding eyeglass
Setting；Infrared light supply includes multiple, and multiple infrared light supplies are distributed on the circumferential profile of eyeglass.
In any of the above-described technical solution, it is preferable that first layer optical waveguide and the interface of second layer optical waveguide are configured to
The third composite construction face formed by multiple bending plain splices；Infrared light supply is respectively arranged at eyeglass with ocular imaging sensor
Both sides, the side fitting of ocular imaging sensor and corresponding eyeglass is arranged.
In any of the above-described technical solution, it is preferable that the interface of second layer optical waveguide and third layer optical waveguide be constructed with
Third composite construction face the 4th composite construction face disposed in parallel.
In any of the above-described technical solution, it is preferable that the appearance of the outer surface and third layer optical waveguide of first layer optical waveguide
Face is all configured as cambered surface.
In any of the above-described technical solution, it is preferable that the appearance of the outer surface and third layer optical waveguide of first layer optical waveguide
Face is formed by multiple bending plain splices.
In any of the above-described technical solution, it is preferable that eyeball tracking device further includes：Frame, eyeglass be set to frame with
In the frame of eyeglass cooperation, infrared light supply can be respectively arranged on frame with ocular imaging sensor.
Specifically, following technique effect may be implemented in eyeball tracking device：
(1) by be arranged the eyeball tracking device of multilayer free form surface optical waveguide, it can be achieved that ocular imaging sensor (including
Camera cmos element) and optical waveguide components integration, solve the problems, such as that eyeball tracking package equipment integrated level is low
(2) it takes the front directly to eyeball state to shoot, eyeball tracking locating speed, optimization tracking effect can be improved.
(3) it is combined by using different interface set-up modes and different interface set-up modes, is realizing light
While waveguide dioptric imaging, the setting demand of the appearance of different eyeglasses is met.
(4) by the way that infrared light supply to be set to the different location of eyeglass circumferential direction, the wear-type for meeting different structure is shown
The construction demand of device.
The additional aspect and advantage of the present invention will become apparent in following description section, or practice through the invention
Recognize.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 shows the theory structure schematic diagram of eyeball tracking device according to an embodiment of the invention；
Fig. 2 shows the structural schematic diagrams of eyeball tracking device according to an embodiment of the invention；
Fig. 3 show the eyeball tracking device A-A in Fig. 2 to structural schematic diagram；
Fig. 4 shows the structural schematic diagram of eyeball tracking device according to another embodiment of the invention；
Fig. 5 shows the structural schematic diagram of the eyeball tracking device B-B direction in Fig. 4；
Fig. 6 shows the structural schematic diagram of eyeball tracking device according to still another embodiment of the invention；
Fig. 7 show the eyeball tracking device C-C in Fig. 6 to structural schematic diagram；
Correspondence in Fig. 1 to Fig. 7 in the present invention between reference numeral and component names is：
10 eyeglasses, 102 first layer optical waveguides, 104 second layer optical waveguides, 106 third layer optical waveguides, 1,042 first sub-lights
Film, 1,044 second sub-light films, 20 infrared light supplies, 30 ocular imaging sensors, 40 frames, 50 eyeballs.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
As shown in Figures 1 to 7, eyeball tracking device according to an embodiment of the invention, including：Eyeglass 10, is rolled over by multilayer
Penetrate rate it is different curved surface optical waveguide superposition constitute, the different curved surface optical waveguide of multilayer refractive index according to wear when eyeball 50 between
Distance include first layer optical waveguide 102, second layer optical waveguide 104 and third layer optical waveguide 106, first layer successively from the near to the distant
The refractive index of optical waveguide 102 and third layer optical waveguide 106 is all higher than the refractive index of airspace, the folding of first layer optical waveguide 102
Penetrate the refractive index that rate is more than second layer optical waveguide 104；Infrared light supply 20, the specific bit being set on the circumferential profile of eyeglass 10
It sets；Ocular imaging sensor 30 is set to the side of eyeglass 10, wherein after the start-up operation of eyeball tracking device, infrared light supply
After the infrared light of 20 transmittings is reflected by eyeball 50, into first layer optical waveguide 102, and in the appearance of first layer optical waveguide 102
After multiple reflections occur between face and first layer optical waveguide 102 and the interface of second layer optical waveguide 104, it is transmitted to ocular imaging
Sensor 30 realizes that eyeball 50 is imaged.
In this embodiment, by the way that the eyeball tracking device of multilayer free form surface optical waveguide is arranged, it can be achieved that ocular imaging
The integration of sensor 30 (including camera cmos element) and optical waveguide components solves eyeball 50 and tracks package equipment integrated level
Low problem provides new departure for the summary design and appearance extension of final products such as VR, AR or other HMD, while can
Improve 50 tracing and positioning speed of eyeball, optimization tracking effect.
In addition, the eyeball tracking device in above-described embodiment provided by the invention can also have following supplementary technology special
Sign：
In the above embodiment, it is preferable that second layer curved surface optical waveguide is to be superimposed by least one set of light film, one group of light film packet
It includes the different sub-light film superposition of at least two refractive index to constitute, wherein for each group of light film, close to first layer optical waveguide 102
The refractive index of the first sub-light film 1042 be less than the refractive index of the second sub-light film 1044 far from first layer optical waveguide 102.
In this embodiment, eyeball tracking device can be by infrared light supply 20, multilayer free form surface optical waveguide, ocular imaging
Sensor 30 is constituted, and infrared light supply 20 includes two infrared light supplies 20, and eyeball 50 reflects the light wave that infrared light supply 20 is sent out, for eye
The capture imaging of ball imaging sensor 30.Multilayer free form surface optical waveguide is made of the different curved surface optical waveguide of multilayer refractive index,
In near 50 region of eyeball first layer optical waveguide 102 use high-index material, refractive index n1, far from eyeball 50
One end is third layer optical waveguide 106, refractive index n3, the refractive index n of airspace0It indicates.First layer optical waveguide 102 with
Second layer optical waveguide 104 between third layer optical guided wave is free form surface Anti-reflective coating, a certain wavelength for making infrared light supply 20 send out
Reflecting light interference enhancing, second layer optical waveguide 104 is alternately made of the different material of at least two layers of refractive index, refractive index from
First layer optical guided wave to third layer optical guided wave is followed successively by n21、n22, first layer optical waveguide 102, second layer optical waveguide 104, third layer
Optical waveguide 106 is with airspace, and contact surface arbitrarily between the two can be free form surface, and ocular imaging sensor 30 captures
The infrared waves conducted through multilayer free form surface optical waveguide obtain eyeball image when eyeball 50 watches different spatial attentively,
In, the cmos element in ocular imaging sensor 30 is close to the placement of multilayer free form surface optical waveguide, infrared light supply 20 and eyeball at
As sensor 30 is located at the side of multilayer free form surface optical waveguide.
Wherein, the relationship between each refractive index is as follows：n1>n0, n1>n21, n21<n22And n3>n0。
The refractive index n of first layer optical waveguide 1021More than the refractive index n of airspace0, it is ensured that the infrared light that eyeball 50 reflects
It is always transmissive to enter in first layer optical waveguide 102, and infrared light travels to first layer optical waveguide 102- airspaces interface
When, it is totally reflected as much as possible, second layer optical waveguide 104 has low in the first layer material of nearly first layer optical waveguide 102
Refractive index n21, the second layer material is with high refractive index n22, and the refractive index n of first layer optical waveguide 1021More than second layer optical waveguide
The refractive index n of nearly 102 layers of first layer optical waveguide in 10421, choose on demand in second layer optical waveguide 104 thickness of layers of material and
Refractive index to meet the relevant enhancing condition of infrared external reflection light wave, and makes in first layer optical waveguide 102- second layers optical waveguide 104
The interface reflected light line generation cirtical angle of total reflection is as small as possible, and the infrared light of higher energy is tied to first layer light wave
It is transmitted in leading 102, until being transferred to cmos element.
Via the infrared light that human eye reflects, pass through airspace -102 interface of first layer optical waveguide (i.e. first layer optical waveguide
102 outer surface) enter first layer optical waveguide 102 after, first on 104 interface of first layer optical waveguide 102- second layers optical waveguide
Reflection and transmission, the light wave reflected on 104 interface of first layer optical waveguide 102- second layers optical waveguide, due to freedom occurs
The effect of curved surface Anti-reflective coating interferes enhancing, then in first layer optical waveguide 102- airspaces and first layer optical waveguide 102-
Second layer optical waveguide is repeatedly emitted between 104 interface, until cmos element is transferred to, using pupil, iris for infrared light
This different characteristic of reflectivity, CMOS photosensitive imagings, and then can judge user's central fovea by the user eyeball image of acquisition
Field range corresponding to the visual field.
In any of the above-described embodiment, it is preferable that second layer curved surface optical waveguide is 1-D photon crystal layer.
Second layer optical waveguide 104 can be 1-D photon crystal material, from first layer optical waveguide 102 to third layer light wave
It leads in 106 transmission direction, the light of infrared band is reflected.
In addition, by Fresnel equation (principle：When light from it is a kind of with refractive index be η 1 medium to another kind have reflect
When the medium that rate is η 2 is propagated, the reflection and refraction of light may occur simultaneously in the intersection (commonly referred to as interface) of the two)
It is found that the refractive index n of optimization first layer optical waveguide 1021With first layer optical waveguide 102- airspaces, first layer optical waveguide 102-
Electric field can be improved at 104 interface of first layer optical waveguide 102- second layers optical waveguide in 104 interface angle of incidence of light of second layer optical waveguide
Reflected optical power, and then image quality is improved, wherein incidence angle can be by changing first layer optical waveguide 102- second layer optical waveguides
104 surface physics shapes are realized.
In any of the above-described embodiment, it is preferable that the interface of first layer optical waveguide 102 and second layer optical waveguide 104 is by structure
It makes to combine the first composite construction face formed with more folding faces by cambered surface；Infrared light supply 20 is set respectively with ocular imaging sensor 30
The both sides of eyeglass 10 are placed in, ocular imaging sensor 30 is bonded with the side of corresponding eyeglass 10 to be arranged.
In any of the above-described embodiment, it is preferable that the interface of first layer optical waveguide 102 and second layer optical waveguide 104 is by structure
Make for by trapezoidal concave surface and inverted trapezoidal convex surface along the second composite construction face that the width structural grain of eyeglass 10 is cross-linked to form；
There are two the tools of ocular imaging sensor 30, and is respectively arranged at the both sides of eyeglass 10, ocular imaging sensor 30 and corresponding mirror
The side fitting setting of piece 10；Infrared light supply 20 includes multiple, and multiple infrared light supplies 20 are distributed on the circumferential profile of eyeglass 10.
In any of the above-described embodiment, it is preferable that the interface of first layer optical waveguide 102 and second layer optical waveguide 104 is by structure
Make the third composite construction face to be formed by multiple bending plain splices；Infrared light supply 20 is set respectively with ocular imaging sensor 30
The both sides of eyeglass 10 are placed in, ocular imaging sensor 30 is bonded with the side of corresponding eyeglass 10 to be arranged.
In any of the above-described embodiment, it is preferable that the interface of second layer optical waveguide 104 and third layer optical waveguide 106 is by structure
It makes and third composite construction face the 4th composite construction face disposed in parallel.
In any of the above-described embodiment, it is preferable that the outer surface of first layer optical waveguide 102 and third layer optical waveguide 106
Outer surface is all configured as cambered surface.
In any of the above-described embodiment, it is preferable that the outer surface of first layer optical waveguide 102 and third layer optical waveguide 106
Outer surface is formed by multiple bending plain splices.
In any of the above-described embodiment, it is preferable that eyeball tracking device further includes：Frame 40, eyeglass are set to frame 40
In the frame coordinated with eyeglass 10, infrared light supply 20 can be respectively arranged at ocular imaging sensor 30 on frame 40.
Fig. 2 and Fig. 3 shows the structural schematic diagram of eyeball tracking device according to an embodiment of the invention.
Embodiment one：
First layer optical waveguide 102, third layer optical waveguide 106 and airspace contact surface are cambered surface, first layer optical waveguide
104 interface of 102- second layers optical waveguide is that more folding faces are combined with cambered surface.Infrared light supply 20 is located at multilayer free form surface optical waveguide one
On the mirror holder of side, the cmos element of ocular imaging sensor 30 is tightly attached to the side of the multilayer free form surface optical waveguide other side.
Infrared light supply 20 and CMOS original papers are positioned over the not homonymy of multilayer free form surface light wave, change first layer optical waveguide
The shape at 104 interface of 102- second layers optical waveguide may make the light more reflected through eyeball 50 to be transmitted to cmos element side.
Via the infrared light that human eye reflects, first layer optical waveguide is entered by airspace -102 interface of first layer optical waveguide
After 102, reflection and transmission occur first on 104 interface of first layer optical waveguide 102- second layers optical waveguide.In first layer light wave
The light wave reflected on 104 interface of 102- second layers optical waveguide is led, since the effect of free form surface Anti-reflective coating interferes increasing
By force, the subsequent quilt between 104 interface of first layer optical waveguide 102- airspaces and first layer optical waveguide 102- second layers optical waveguide
Repeatedly transmitting, until being transferred to ocular imaging sensor 30.Using pupil, iris for this different spy of the reflectivity of infrared light
Property, 30 photosensitive imaging of ocular imaging sensor, and then can judge user's central fovea visual field institute by the user eyeball image of acquisition
Corresponding field range.
Embodiment two：
Fig. 4 and Fig. 5 shows the structural schematic diagram of eyeball tracking device according to an embodiment of the invention.
The outer surface of first layer optical waveguide 102 is all configured as cambered surface, first layer with the outer surface of third layer optical waveguide 106
The interface of optical waveguide 102 and second layer optical waveguide 104 is configured to the width with inverted trapezoidal convex surface along eyeglass 10 by trapezoidal concave surface
The second composite construction face that structural grain is cross-linked to form；There are two the tools of ocular imaging sensor 30, and is respectively arranged at mirror
The both sides of piece 10, ocular imaging sensor 30 is bonded with the side of corresponding eyeglass 10 to be arranged；Infrared light supply 20 is more including multiple
A infrared light supply 20 is distributed on the circumferential profile of eyeglass 10.Infrared light supply 20 is located in 40 surrounding of frame, two ocular imagings
Sensor 30 is tightly attached to multilayer free form surface optical waveguide both sides.
Embodiment three：
Fig. 6 and Fig. 7 shows the structural schematic diagram of eyeball tracking device according to an embodiment of the invention.
In any of the above-described embodiment, it is preferable that the outer surface of first layer optical waveguide 102 and third layer optical waveguide 106
Outer surface is formed by multiple bending plain splices, 106 interface of second layer optical waveguide 104- third layer optical waveguide is to combine more folding faces.
Infrared light supply 20 is located on the mirror holder of multilayer free form surface optical waveguide side, and the cmos element of ocular imaging sensor 30 is tightly attached to
The side of the multilayer free form surface optical waveguide other side.
Virtual reality device according to an embodiment of the invention, including the eyeball tracking dress described in any of the above-described embodiment
It sets.
Augmented reality equipment according to an embodiment of the invention, including the eyeball tracking dress described in any of the above-described embodiment
It sets.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ",
The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, can also be can
Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the instructions such as term "upper", "lower", "left", "right", "front", "rear"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, specific direction must be had, with specific azimuth configuration and operation by not indicating or implying the indicated device or unit,
It is thus impossible to be interpreted as limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the present invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of eyeball tracking device based on multilayer free form surface optical waveguide, which is characterized in that including：
Eyeglass is made of, the different curved surface optical waveguide of the multilayer refractive index the different curved surface optical waveguide superposition of multilayer refractive index
According to including first layer optical waveguide, second layer optical waveguide and third layer light successively from the near to the distant with the distance between eyeball when wearing
Waveguide, the refractive index of the first layer optical waveguide and the third layer optical waveguide are all higher than the refractive index of airspace, and described the
The refractive index of one layer of optical waveguide is more than the refractive index of the second layer optical waveguide；Infrared light supply is set to the circumferential direction of the eyeglass
Designated position on profile；Ocular imaging sensor is set to the side of the eyeglass.
Wherein, after the infrared light of the infrared light supply transmitting is by ocular reflex, into the first layer optical waveguide, and described
Occur between the outer surface of first layer optical waveguide and the first layer optical waveguide and the interface of the second layer optical waveguide multiple
After reflection, it is transmitted to the ocular imaging sensor and realizes ocular imaging.
2. eyeball tracking device according to claim 1, which is characterized in that
The second layer curved surface optical waveguide be by least one set of light film be superimposed, one group of light film include at least two refractive index not
Same sub-light film superposition is constituted,
Wherein, for light film described in each group, the refractive index close to the sub-light film of the first layer optical waveguide is less than far from described
The refractive index of the sub-light film of first layer optical waveguide.
3. eyeball tracking device according to claim 2, which is characterized in that
The second layer curved surface optical waveguide is 1-D photon crystal layer.
4. eyeball tracking device according to claim 2, which is characterized in that
The first layer optical waveguide and the interface of the second layer optical waveguide, which are configured to be combined with more folding faces by cambered surface, to be formed
First composite construction face；
The infrared light supply is respectively arranged at the both sides of the eyeglass, the ocular imaging sensing with the ocular imaging sensor
Device is bonded with the side of the corresponding eyeglass to be arranged.
5. eyeball tracking device according to claim 2, which is characterized in that
The interface of the first layer optical waveguide and the second layer optical waveguide is configured to by trapezoidal concave surface and inverted trapezoidal convex surface edge
The second composite construction face that the width structural grain of the eyeglass is cross-linked to form；
There are two the ocular imaging sensor tools, and is respectively arranged at the both sides of the eyeglass, the ocular imaging sensor
It is bonded and is arranged with the side of the corresponding eyeglass；
The infrared light supply includes multiple, and multiple infrared light supplies are distributed on the circumferential profile of the eyeglass.
6. eyeball tracking device according to claim 2, which is characterized in that
The interface of the first layer optical waveguide and the second layer optical waveguide is configured to bend what plain splices were formed by multiple
Third composite construction face；
The infrared light supply is respectively arranged at the both sides of the eyeglass, the ocular imaging sensing with the ocular imaging sensor
Device is bonded with the side of the corresponding eyeglass to be arranged.
7. eyeball tracking device according to claim 6, which is characterized in that including：
The second layer optical waveguide is constructed set parallel with third composite construction face with the interface of the third layer optical waveguide
The 4th composite construction face set.
8. eyeball tracking device according to any one of claims 4 to 7, which is characterized in that including：
The outer surface of the first layer optical waveguide and the outer surface of the third layer optical waveguide are all configured as cambered surface.
9. eyeball tracking device according to any one of claims 4 to 7, which is characterized in that including：
The outer surface of the first layer optical waveguide and the outer surface of the third layer optical waveguide are formed by multiple bending plain splices.
10. eyeball tracking device according to any one of claim 1 to 3, which is characterized in that including：Frame, the mirror
Piece is set to the frame in the frame of eyeglass cooperation, and the infrared light supply can divide with the ocular imaging sensor
It is not set on the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454738.3A CN108681400A (en) | 2018-05-13 | 2018-05-13 | A kind of eyeball tracking device based on multilayer free form surface optical waveguide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454738.3A CN108681400A (en) | 2018-05-13 | 2018-05-13 | A kind of eyeball tracking device based on multilayer free form surface optical waveguide |
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| CN108681400A true CN108681400A (en) | 2018-10-19 |
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| CN201810454738.3A Pending CN108681400A (en) | 2018-05-13 | 2018-05-13 | A kind of eyeball tracking device based on multilayer free form surface optical waveguide |
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| CN110208896A (en) * | 2019-05-21 | 2019-09-06 | 上海先研光电科技有限公司 | A kind of screen that novel light wave is led and led using novel light wave |
| US11928257B2 (en) | 2021-02-17 | 2024-03-12 | Samsung Electronics Co., Ltd. | Method and electronic device for tracking eye |
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