CN207650482U - Eliminate the binocular sight tracing equipment of interference light - Google Patents
Eliminate the binocular sight tracing equipment of interference light Download PDFInfo
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- CN207650482U CN207650482U CN201721512342.7U CN201721512342U CN207650482U CN 207650482 U CN207650482 U CN 207650482U CN 201721512342 U CN201721512342 U CN 201721512342U CN 207650482 U CN207650482 U CN 207650482U
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Abstract
The utility model discloses a kind of binocular sight tracing equipments for eliminating interference light.Wherein, which includes the second camera for the second eyes image of first camera and acquisition for acquiring the first eyes image, further includes：At least one first light source, for providing light source for first camera；At least one second light source, for providing light source for second camera, wherein first light source and second light source are the light source with different wavelength；First filter unit is located at the front of the camera lens of first camera, passes through the interference light that the second cornea enters first camera for filtering out second light source；Second filter unit is located at the front of the camera lens of second camera, passes through the interference light that the first cornea enters second camera for filtering out first light source.The technical issues of light source that the utility model solves binocular camera interferes with each other.
Description
Technical field
The utility model is related to Eye-controlling focus fields, in particular to a kind of binocular Eye-controlling focus for eliminating interference light
Equipment.
Background technology
The study to nearly eye display technology and understanding with people, nearly eye show that product is obtained in all trades and professions and answer
With.Wherein, VR (Virtual Reality, virtual reality) technologies and (Augmented Reality, augmented reality) technology obtain
To being widely applied.
Eyeball tracking technology also obtains wider array of application with the prevalence of VR and AR products.Wherein, in Eye-controlling focus field
In, the LED of near-infrared is mostly used as light source, and pupil and LED are formed by hot spot as sight calculations in cornea transmitting
With reference to.Therefore, tracking field is being realized, it is relatively high to the quality requirement of the eye image captured by camera, for example, eye part skin
It is unable to veiling glare spot that cannot have excessive on overexposure, cornea and sclera etc..
However, in existing nearly eye shows product, since binocular sight tracing equipment is used as illumination using independent LED
Light source, the formation basic theory schematic diagram of interference light as shown in Figure 1, the light that the near-infrared LED light source led 4 of the second eye is sent out
It is reflected by cornea A2, is captured to form hot spot by the camera lens C2 of the second eye, to the reference as eyeball tracking algorithm.Work as pupil
When hole distance increases, the light that the near-infrared LED light source led 1 of the first eye is sent out can also be reflected by the cornea A2 of the second eye,
And received and be imaged by the camera lens C2 of the second eye, to form interference light D.Similarly, the formation of the interference light of the first eye
Journey is identical as the interference forming process of light of the second eye, and details are not described herein.Wherein, A1 and A2 indicate respectively the first eye and
The cornea of second eye, B1 and B2 indicate that the eyeball of the first eye and the second eye, LED1, LED2, LED3 and LED4 are respectively
Four LED light sources, C1 and C2 indicate that the camera lens of the camera of the first eye and the second eye, D expressions are reflected into through cornea A2 respectively
Enter the interference light to second camera, E indicates reflected light.
To solve the above problems, being usually utilized in one baffle (such as Fig. 2 of addition in the equipment of binocular Eye-controlling focus at present
In baffle F) or the position of near-infrared LED sunk, to make the light of the near-infrared LED corresponding to a certain eyes to
In addition when the cornea of one eye eyeball is propagated, interference light can be blocked, and then eliminate influence of the interference light to imaging.
However, the above method can cause the appearance for binocular sight tracing equipment more complicated, and as nearly eye is aobvious
Show that the increase of equipment interpupillary distance, the height of baffle also can accordingly increase, to affect the normal use of equipment.
The problem of being interfered with each other for the light source of above-mentioned binocular camera, currently no effective solution has been proposed.
Utility model content
The utility model embodiment provides a kind of binocular sight tracing equipment for eliminating interference light, at least to solve binocular
The technical issues of light source of camera interferes with each other.
According to the one side of the utility model embodiment, provides a kind of eliminate and the binocular Eye-controlling focus of light is interfered to set
Standby, which includes the second phase of the second eyes image of first camera and acquisition for acquiring the first eyes image
Machine further includes：At least one first light source, for providing light source for first camera；At least one second light source, for being second
Camera provides light source, wherein first light source and second light source are the light source with different wavelength；First filter unit, is located at
The front of the camera lens of first camera enters the dry of first camera for filtering out second light source by the first cornea of the first eye
Disturb light；Second filter unit is located at the front of the camera lens of second camera, pass through the second eye for filtering out first light source second
Cornea enters the interference light of second camera.
Further, the first filter unit and the second filter unit include one of following：Spike filter, narrow-band-filter
Film, polarizing film.
Further, in the case where the first filter unit and the second filter unit are spike filter, the first optical filtering is single
The distance between member and the camera lens of first camera are the first pre-determined distance, between the second filter unit and the camera lens of second camera
Distance is the second pre-determined distance, wherein the first pre-determined distance and the second pre-determined distance meet preset relation and make the first optical filtering list
Member filters out the interference light filtered out into the interference light of first camera and/or the second filter unit into second camera.
Further, in the case where the first filter unit and the second filter unit are narrow-band-filter film, first camera
Camera lens and the camera lens of second camera are coated with narrow-band-filter film.
Further, the first filter unit and the second filter unit allow by wave-length coverage it is not be overlapped.
Further, the centre wavelength of the first filter unit is 850nm, and the centre wavelength of the second filter unit is 940nm,
The bandwidth of first filter unit and the second filter unit is respectively 20nm.
Further, the wavelength of first light source is located within the corresponding cutoff range of the second filter unit, second light source
Wavelength is located within the corresponding cutoff range of the first filter unit.
Further, the wavelength of first light source and second light source is the wavelength of infrared band.
Further, the number of first light source and the number of second light source are identical.
In the utility model embodiment, the light source using the light source of different wave length as first camera and second camera
Mode is provided with a kind of binocular sight tracing equipment eliminated and interfere light, which includes the first eye of acquisition
The second camera of the second eyes image of the first camera of image and acquisition further includes at least one first light source, at least one the
Two light sources, the first filter unit and the second filter unit, wherein at least one first light source is used to provide light for first camera
Source；At least one second light source is used to provide light source for second camera, wherein first light source and second light source is with different
The light source of wavelength；First filter unit is located at the front of the camera lens of first camera, passes through the first cornea for filtering out second light source
Enter the interference light of first camera；Second filter unit is located at the front of the camera lens of second camera, for filtering out first light source
The interference light that second camera is entered by the second cornea has reached the interference light for effectively eliminating the first eye and the second eye
Purpose, and then the technical issues of the light source for solving binocular camera interferes with each other.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings：
Fig. 1 be according to prior art it is a kind of interference light formation basic theory schematic diagram；
Fig. 2 is a kind of structural representation of binocular sight tracing equipment that eliminating interference light using baffle according to prior art
Figure；And
Fig. 3 is the structural representation for the binocular sight tracing equipment that light is interfered according to a kind of elimination of the utility model embodiment
Figure.
Specific implementation mode
In order to make those skilled in the art more fully understand the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered
When the range for belonging to the utility model protection.
According to the utility model embodiment, a kind of binocular sight tracing equipment embodiment for eliminating interference light is provided.Its
In, Fig. 3 is according to the structural schematic diagram of the binocular sight tracing equipment of the elimination interference light of the utility model embodiment, such as Fig. 3
Shown, which includes：Acquire the of the second eyes image of first camera and acquisition of the first eyes image
(A1 and A2 indicate the cornea of the first eye and the second eye to two cameras respectively, and B1 and B2 indicate the first eye and second respectively
The eyeball in portion, C1 and C2 indicate that the camera lens of first camera and second camera, D expressions are reflected into through cornea A1 to the first phase respectively
The interference light of machine), at least one first light source LED_A (two are illustrated only in Fig. 3), at least one second light source LED_B (figure
Two are illustrated only in 3), the first filter unit G1 and the second filter unit G2.
Wherein, at least one first light source LED_A is used to provide light source for first camera；At least one second light source LED_
B is used to provide light source for second camera, wherein at least one first light source LED_A and at least one second light source LED_B is tool
There is the light source of different wavelength；First filter unit G1 is located at the front of the camera lens C1 of first camera, for filtering out second light source
LED_B enters the interference light of first camera by the first cornea A1；Second filter unit G2 is located at the camera lens C2 of second camera
Front, enter the interference light of second camera by the second cornea A2 for filtering out first light source LED_A.
It should be noted that this binocular sight tracing equipment can be but be not limited to virtual reality device, augmented reality is set
For and suitable for all near-eye display systems using the Eye-controlling focus equipment based on binocular.Above-mentioned first light source and the second light
The wavelength in source is not limited to the wavelength of near-infrared section, above-mentioned under the premise of not damaging on human eye and influencing existing equipment light path
First light source and second light source can be the lighting source of any wavelength.The number of first light source and the number of second light source can be with
It is identical.
In a kind of optional embodiment, the first light source LED_A of the first eye and the second light source LED_B of the second eye
With different wavelength, there is the first filter unit G1 (for example, optical filter), the optical filtering before the corresponding camera lens C1 of the first eye
Unit G1 can only make wavelength be that the light source in the first range passes through, wherein the wavelength of first light source is within the scope of first；Together
Reason before the corresponding camera lens C2 of the second eye there is the second filter unit G2 (for example, optical filter), filter unit G2 can only make
Wavelength is that the light source in the second range passes through, wherein the wavelength of second light source is within the scope of second.The difference is that first
The cutoff range of wavelength corresponding to filter unit and the second filter unit is different.Therefore, the light of first light source cannot lead to
It crosses the second filter unit to enter in the camera lens C2 of second camera, the light of second light source cannot be entered by the first filter unit
In the camera lens C1 of first camera, to which interference light will not be imaged, that is, achieve the purpose that eliminating eyes light source interferes with each other.
From the foregoing, it will be observed that the application using different wave length light source as being set by the way of the light source of first camera and second camera
A kind of binocular sight tracing equipment for eliminating interference light is set, which includes the first eyes image of acquisition
First camera and acquisition the second eyes image second camera, further include at least one first light source, at least one second light source,
First filter unit and the second filter unit, wherein at least one first light source is used to provide light source for first camera；At least one
A second light source is used to for second camera provide light source, wherein first light source and second light source are the light with different wavelength
Source；First filter unit is located at the front of the camera lens of first camera, and the is entered by the first cornea for filtering out second light source
The interference light of one camera；Second filter unit is located at the front of the camera lens of second camera, passes through second for filtering out first light source
Cornea enters the interference light of second camera.
Be easily noted that, since first light source and second light source have a different wavelength, and the first filter unit and
Second filter unit can filter out the light of different wave length, so that the light of first light source is after the second corneal reflection
Interference light is filtered out by the second filter unit, and the light of first light source will not enter second camera；Similarly, the light of second light source is by the
Interference light after one corneal reflection will be filtered out by the first filter unit, and the light of second light source will not enter first camera, to disappear
Interference in addition to interfering light.
As shown in the above, the application can reach the mesh for the interference light for effectively eliminating the first eye and the second eye
, the first eye and the illumination of the second eye are solved on the basis of not changing the appearance of equipment of binocular Eye-controlling focus to realize
The problem of interfering with each other.
In a kind of optional embodiment, the first filter unit and the second filter unit include one of following：Narrow-band-filter
Piece, narrow-band-filter film, polarizing film.Wherein, in the case where the first filter unit and the second filter unit are spike filter, the
The distance between one filter unit and the camera lens of first camera are the first pre-determined distance, the mirror of the second filter unit and second camera
The distance between head is the second pre-determined distance, wherein the first pre-determined distance and the second pre-determined distance meet preset relation and make the
One filter unit filters out the interference light filtered out into the interference light of first camera and/or the second filter unit into second camera.
That is, above-mentioned preset relation is the position relationship that interference light can be made not enter first camera and/or second camera.
In an alternative embodiment, the case where the first filter unit and the second filter unit are narrow-band-filter film
Under, the camera lens of first camera and the camera lens of second camera can be coated with narrow-band-filter film.It will be understood by those skilled in the art that narrowband
Filter coating and spike filter function having the same, only form is different.
It should be noted that the structure of the camera lens of camera corresponding to the first eye and the second eye, filter unit, light source
And placement position can mirror image, but the wavelength of light source led _ A and LED_B, the first filter unit G1 and the second filter unit each other
The cutoff wavelength of G2 is different.
In a kind of optional embodiment, the first filter unit and the second filter unit allow by wave-length coverage do not weigh
It is folded.For example, the centre wavelength of the first filter unit is 850nm, the centre wavelength of the second filter unit is 940nm, and first filters
The bandwidth of unit and the second filter unit is respectively 20nm, then the wave-length coverage of the permissible light source passed through of the first filter unit is
The wave-length coverage of 830nm~870nm, the permissible light source passed through of the second filter unit are 920nm~960nm, two lists that filter
Member allow by wave-length coverage be not overlapped.It can at least ensure that the light sent out from same light source will not enter two simultaneously in this way
Camera.Further, the wavelength of first light source is located within the corresponding cutoff range of the second filter unit, the wavelength of second light source
Within the corresponding cutoff range of the first filter unit, therefore the interference light after the second corneal reflection is sent out from first light source
Second camera will not be entered, first camera will not be entered by sending out the interference light after the first corneal reflection from second light source.Therefore,
The filter unit of above-mentioned the first filter unit and the second filter unit as the application can be used.
In a kind of preferred embodiment, the second eye near-infrared light source LED_B is the wavelength different from the first eye
Near-infrared light source LED_A, for example, the second eye uses 850nm wavelength near-infrared light source LED_B, the first eye to use 940nm waves
Long near-infrared light source LED_A.It is 20nm that bandwidth is arranged before the camera lens C2 of the second eye, and the narrowband that centre wavelength is 850nm is cut
Only optical filter G2, it is 20nm that bandwidth is arranged before the camera lens C1 of the first eye, and centre wavelength is the narrow-cut optical filter of 940nm
G1, then interference light of the near-infrared light source LED_B of the second eye after the cornea A1 of the first eye reflections are by centre wavelength
The narrow-cut optical filter G1 of 940nm absorbs, and will not form veiling glare by the camera lens C1 imagings of the first eye；First eye
Interference light of the near-infrared light source LED_A after the cornea A2 reflections of the second eye, is filtered by the narrow-cut that centre wavelength is 850nm
Mating plate G2 absorbs, and will not be interfered with each other by the camera lens C2 imagings of the second eye to achieve the purpose that eliminate eyes light source.
In an alternative embodiment, when first light source and second light source are the partial polarization with different polarization states
When light source, the first filter unit is the polarizing film to match with the polarization state of first light source, and the second filter unit is and the second light
The polarizing film that the polarization state in source matches can also equally be reached using polarizing film and eliminate the mesh from another eye reflections light
's.Specifically, first light source and second light source can be the infrared polarization light source with different polarization states, the light sent out is through cornea
Do not change polarization state after reflection.Due to have in front of the camera lens of first camera and second camera respectively with first light source and the second light
The polarizing film that the polarization state in source matches sends out the polarized infrared light after the second corneal reflection because of polarization state not from first light source
It is same to send out the infrared polarization after the first corneal reflection from second light source by the polarizing film in front of second camera camera lens
Light can not be interfered with each other by the polarizing film in front of first camera camera lens to reach elimination eyes light source because of polarization state difference
Purpose.
Above-mentioned the utility model embodiment serial number is for illustration only, can not represent the quality of embodiment.
In above-described embodiment of the utility model, all emphasize particularly on different fields to the description of each embodiment, in some embodiment
The part not being described in detail may refer to the associated description of other embodiment.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (9)
1. a kind of binocular sight tracing equipment for eliminating interference light, including the first camera of the first eyes image of acquisition and acquisition the
The second camera of two eyes images, which is characterized in that the binocular sight tracing equipment further includes：
At least one first light source, for providing light source for the first camera；
At least one second light source, for providing light source for the second camera, wherein the first light source and second light
Source is the light source with different wavelength；
First filter unit is located at the front of the camera lens of the first camera, for filtering out the second light source by described the
First cornea of one eye enters the interference light of the first camera；
Second filter unit is located at the front of the camera lens of the second camera, for filtering out the first light source by described the
Second cornea of two eyes enters the interference light of the second camera.
2. binocular sight tracing equipment according to claim 1, which is characterized in that first filter unit and described
Two filter units include one of following：Spike filter, narrow-band-filter film, polarizing film.
3. binocular sight tracing equipment according to claim 2, which is characterized in that in first filter unit and described
In the case that second filter unit is the spike filter, between first filter unit and the camera lens of the first camera
Distance be the first pre-determined distance, the distance between camera lens of second filter unit and the second camera is default for second
Distance, wherein first pre-determined distance meets preset relation with second pre-determined distance and makes first filter unit
Filter out the interference filtered out into the interference light of the first camera and/or second filter unit into the second camera
Light.
4. binocular sight tracing equipment according to claim 2, which is characterized in that in first filter unit and described
In the case that second filter unit is the narrow-band-filter film, the camera lens of the camera lens of the first camera and the second camera plates
There is the narrow-band-filter film.
5. the binocular sight tracing equipment according to any one of claim 3 and 4, which is characterized in that first filter
Light unit and second filter unit allow by wave-length coverage it is not be overlapped.
6. binocular sight tracing equipment according to claim 5, which is characterized in that the middle cardiac wave of first filter unit
The centre wavelength of a length of 850nm, second filter unit are 940nm, and first filter unit and described second are filtered single
The bandwidth of member is respectively 20nm.
7. binocular sight tracing equipment according to claim 6, which is characterized in that the wavelength of the first light source is located at institute
It states within the corresponding cutoff range of the second filter unit, it is corresponding that the wavelength of the second light source is located at first filter unit
Within cutoff range.
8. binocular sight tracing equipment according to claim 7, which is characterized in that the first light source and second light
The wavelength in source is the wavelength of infrared band.
9. binocular sight tracing equipment according to claim 1, which is characterized in that the number of the first light source with it is described
The number of second light source is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721512342.7U CN207650482U (en) | 2017-11-13 | 2017-11-13 | Eliminate the binocular sight tracing equipment of interference light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721512342.7U CN207650482U (en) | 2017-11-13 | 2017-11-13 | Eliminate the binocular sight tracing equipment of interference light |
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| CN207650482U true CN207650482U (en) | 2018-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205789A1 (en) * | 2021-03-30 | 2022-10-06 | 青岛小鸟看看科技有限公司 | Eyeball tracking method and system based on virtual reality |
-
2017
- 2017-11-13 CN CN201721512342.7U patent/CN207650482U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205789A1 (en) * | 2021-03-30 | 2022-10-06 | 青岛小鸟看看科技有限公司 | Eyeball tracking method and system based on virtual reality |
| US11640201B2 (en) | 2021-03-30 | 2023-05-02 | Qingdao Pico Technology Co., Ltd. | Virtual reality-based eyeball tracking method and system |
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