CN109725416A - Eyeball tracking optical system, headset equipment and imaging method - Google Patents
Eyeball tracking optical system, headset equipment and imaging method Download PDFInfo
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- CN109725416A CN109725416A CN201910188763.6A CN201910188763A CN109725416A CN 109725416 A CN109725416 A CN 109725416A CN 201910188763 A CN201910188763 A CN 201910188763A CN 109725416 A CN109725416 A CN 109725416A
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Abstract
The embodiment of the invention discloses a kind of eyeball tracking optical system, headset equipment and imaging methods.It include: light source unit, ocular unit and light path control unit；The light source unit, for emitting specified wavelength light, the light can enter user's eye；The ocular unit is arranged relative to user's eye, and the light source unit is placed in ocular unit edge；The ocular unit is set between eye and the light path control unit；The light path control unit is set in the optical path by the ocular unit emergent light, and at a certain angle with optical axis；It is followed in the light path control unit and forms corresponding first optical path under the first light path control mode in the same time and form corresponding second optical path under the second light path control mode.The tracking to eyeball may be implemented, improve the quality of ocular imaging, to improve the accuracy to eyeball tracking.
Description
Technical field
The present embodiments relate to eyeball tracking technical field more particularly to a kind of eyeball tracking optical systems, wear-type
Equipment and imaging method.
Background technique
Eyeball tracking technology is to position in the fields such as human-computer interaction using a kind of pair of very extensive human eye sight at present
Technology, eyeball tracking mould group merged the ambits knowledge such as machinery, electronics, optics.With artificial intelligence, machine vision etc.
The fast development in field, eyeball tracking technology have good application prospect, for example, fatigue monitoring, virtual reality, communication auxiliary
Tool etc..
Existing eyeball tracking device mainly includes two parts: lighting part and imaging moiety.Lighting part usually makes
With the light source of near infrared band, imaging moiety is using groups such as camera and the camera lenses near infrared band with good response
Part.Using the virtual reality device of reflective eyeball tracking technology, since the hot spot of multiple reflections formation occurs between eyeglass for light,
Meeting operates biggish interference to the acquisition of image data, to influence the quality of imaging and the accuracy to eyeball tracking.
Summary of the invention
The embodiment of the present invention provides a kind of eyeball tracking optical system, headset equipment and imaging method, to realize to eye
The tracking of ball, influence of the hot spot for avoiding the multiple reflections of near infrared light from being formed to Image Acquisition, can be improved ocular imaging
Quality, to improve the accuracy to eyeball tracking.
In a first aspect, the embodiment of the invention provides a kind of eyeball tracking optical systems, comprising: light source unit, eyepiece list
Member and light path control unit；
The light source unit, for emitting specified wavelength light, the light can enter user's eye；The ocular unit
It is arranged relative to user's eye, the light source unit is placed in ocular unit edge；The ocular unit is set to eye and described
Between light path control unit；The light path control unit is set in the optical path by the ocular unit emergent light, and and optical axis
It is at a certain angle；It is followed in the light path control unit and forms corresponding first under the first light path control mode in the same time
Optical path and corresponding second optical path is formed under the second light path control mode.
Further, the light path control unit includes the first optical element and the second optical element, first optics
Element is configured to form corresponding first optical path under the first light path control mode, and second optical element is arranged to
Corresponding second optical path can be formed under the second light path control mode.
Further, the first light path control mode is configured to light and reflection second band through first band
Light, wherein first optical path be under the first light path control mode reflected light road；Second light path control
Mode is configured to light and transmission through first band or absorbs the light of second band, wherein second optical path is in institute
State the optical path transmitted under the second light path control mode by first band.
Further, first optical element includes at least one of dichroscope or beam splitter, further includes first
Optical reflection membrane system, the first optical reflection membrane system are fitted in dichroscope or splitter surface.
Further, second optical element includes at least near infrared absorption membrane system or near-infrared through one in membrane system
Kind, near infrared absorption membrane system or near-infrared are used to penetrate visible light through membrane system, and near infrared light is prevented to reflect.
Further, second optical element is arranged in the first optical element outer ring.
Further, the transmitance of first optical element and the second optical element setting visible light is close.
Further, the light of the first band is visible light wave range；The light of second band is near infrared light wave band.
Further: filter unit；
The filter unit is set in the first optical path, for filtering out the light of the first band.
Further, further includes: imaging unit；
The imaging unit is set to after the filter unit, for receiving the second wave filtered through the filter unit
The light of section, to eye and light source imaging.
Second aspect, the embodiment of the invention also provides a kind of headset equipments, including eye described in the embodiment of the present invention
Ball tracks optical system and display screen；
The display screen is various dimensions display screen, for showing various dimensions image
The third aspect, the embodiment of the invention also provides a kind of imaging methods, this method comprises:
The specified wavelength illumination of light source unit transmitting injects user's eye；
The light reflected by user's eye propagates to light path control unit through ocular unit；
The light for propagating to light path control unit follows forms corresponding first light under the first light path control mode in the same time
Road and corresponding second optical path is formed under the second light path control mode；The light path control unit is set to by the eyepiece list
In the optical path of first emergent light, and it is at a certain angle with optical axis.
Eyeball tracking optical system provided in an embodiment of the present invention, comprising: light source unit, ocular unit and light path control list
Member；Light source unit, for emitting specified wavelength light, light can enter user's eye；Ocular unit is set relative to user's eye
It sets, light source unit is placed in ocular unit edge；Ocular unit is set between eye and light path control unit；Light path control unit
It is set in the optical path by ocular unit emergent light, and at a certain angle with optical axis；It is followed simultaneously in light path control unit
It is engraved under the first light path control mode and forms corresponding first optical path and form corresponding second under the second light path control mode
Optical path.The tracking to eyeball may be implemented, using light path control unit, so that the light for propagating to light path control unit follows simultaneously
It is engraved under the first light path control mode and forms corresponding first optical path and form corresponding second under the second light path control mode
Optical path splits the light into two-way, and the quality of ocular imaging can be improved, to improve the accuracy to eyeball tracking.
Detailed description of the invention
The structural schematic diagram of one of Fig. 1 embodiment of the present invention one eyeball tracking optical system；
The structural schematic diagram of one of Fig. 2 embodiment of the present invention one eyeball tracking optical system；
Fig. 3 is the front elevation of one of embodiment of the present invention one light path control unit；
The structural schematic diagram of eyeball tracking optical system when Fig. 4 is user's wearing spectacles in the embodiment of the present invention one；
Fig. 5 is the structural schematic diagram of one of the embodiment of the present invention two headset equipment.
Fig. 6 is the flow chart of one of the embodiment of the present invention three imaging method.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of structural schematic diagram for eyeball tracking optical system that the embodiment of the present invention one provides, as shown in Figure 1,
The optical system includes: light source unit 11, ocular unit 12 and light path control unit 13.
Light source unit 11, for emitting specified wavelength light, light can enter user's eye.Ocular unit 12 relative to
The setting of family eye, light source unit 11 are placed in 12 edge of ocular unit；Ocular unit 12 is set to eye and light path control unit 13
Between.Light path control unit 13 is set in the optical path by 12 emergent light of ocular unit, and at a certain angle with optical axis；In light
It is followed in road control unit 13 and forms corresponding first optical path under the first light path control mode in the same time and in the second optical path control
Corresponding second optical path is formed under molding formula.
Light source unit 11 irradiates eye, and the light reflected by eye propagates to light path control unit 13 through ocular unit 12.
The light for reaching light path control unit 13 follows forms corresponding first optical path and the under the first light path control mode in the same time
Corresponding second optical path is formed under two light path control modes.
Optionally, light path control unit includes the first optical element and the second optical element, and the first optical element is set
For that can form corresponding first optical path under the first light path control mode, the second optical element is configured in the second optical path control
Corresponding second optical path is formed under molding formula.First light path control mode is configured to light and reflection the through first band
The light of two wave bands, wherein the first optical path is the reflected light road under the first light path control mode；Second light path control mode quilt
It is arranged to light and transmission through first band or absorbs the light of second band, wherein the second optical path is in the second light path control
The optical path transmitted under mode by first band.
Wherein, light source unit 11 can be near-infrared light source.Correspondingly, the light of first band can be visible light wave range,
The light of second band can be near-infrared light waves section.The quantity of light source unit 11 can be one or more.When light source unit 11
When quantity is multiple, it can uniformly be set to the edge of ocular unit 12.Ocular unit 12 can be wear-type virtual reality
Ocular unit can be virtual reality (Virtual Reality, VR) eyepiece or augmented reality (Augmented
Reality, AR) eyepiece.The angle of light path control unit 13 and optical axis can be the arbitrary value between 0-90 degree, the degree of angle
It can be selected according to the actual setting of system.
Optionally, the first optical element includes at least one of dichroscope or beam splitter, further includes that the first optics is anti-
Membrane system is penetrated, the first optical reflection membrane system is fitted in dichroscope or splitter surface.Wherein, the first optical reflection membrane system is for saturating
It crosses the light of first band and reflects the light of second band.
Optionally, second optical element includes at least near infrared absorption membrane system or near-infrared through one in membrane system
Kind, near infrared absorption membrane system or near-infrared are used to penetrate visible light through membrane system, and near infrared light is prevented to reflect.
Optionally, the second optical element is arranged in the first optical element outer ring.First optical element can be set to arbitrarily
Shape (such as round, rectangle), the second optical element can be set to arbitrary shape (such as annulus, straight-flanked ring).It is preferred that the second light
The shape for learning element is designed based on the shape of the first optical element, such as assumes that the shape of the first optical element is circle, then and second
The shape of optical element is annulus.
Optionally, Fig. 2 is a kind of structural schematic diagram of the eyeball tracking optical system provided for the embodiment of the present invention one.Such as
Shown in Fig. 2, further includes: filter unit 14, imaging unit 15.
Filter unit 14 is set in the first optical path, for filtering out the light of first band.Imaging unit 15 is set to optical filtering
After unit 14, for receiving the light of the second band through filter unit filtering, to eye and light source imaging.
Illustratively, Fig. 3 is the front elevation of one of embodiment of the present invention light path control unit.As shown in figure 3, optical path
Control unit 13 includes the first optical element 131 and the second optical element 132, and the shape of the first optical element 131 is circle, the
The shape of two optical elements 132 is annulus.First optical element, 131 surface is fitted with the first optical reflection membrane system, for saturating the
The light of the light reflection second band of one wave band；Second optical element 132 is fitted near infrared absorption membrane system or near-infrared through film
System prevents near infrared light from reflecting for penetrating visible light.In the present embodiment, when the light of second band is propagated by ocular unit 12
When to light path control unit 13, the light for reaching the second band of the first optical element 131 reflexes to filter unit 14, reaches second
The light transmission of the second band of optical element 132 is gone out or is absorbed, and filter unit 14 is not reached.The benefit done so,
Avoid reaching the light of the second band of the second optical element 132 from entering imaging after multiple reflections enter back into filter unit 14 single
Member 15 and form hot spot.Optionally, the transmitance of the first optical element 131 and the second optical element 132 setting visible light is close.
Such benefit is, so that the transmitance before virtual reality image reaches human eye is same or similar, to not influence user's
Viewing experience.
The light and the light of external first band that filter unit 14 shows the first band of image to filter out virtual reality,
To prevent the light of first band to the influence of imaging.
Specifically, the working principle of eyeball tracking optical system is: light source irradiates user's eye；The light of second band is in eye
Portion is reflected, and reflected light travels to light path control unit after ocular unit；The light of second band is in the first light path control
Corresponding first optical path is formed under mode, the light of second band enters imaging unit along the first optical path after filter unit.
In another embodiment, user is tracked in the case where wearing glasses with the eyeball to user.Fig. 4 is
The structural schematic diagram of eyeball tracking optical system in the embodiment of the present invention when user's wearing spectacles.Such as
Shown in Fig. 4, light source unit 11 is after glasses irradiate user's eye；The light of second band is reflected in eye, instead
It penetrates light and travels to light path control unit 13 after glasses and ocular unit 12；The light of second band is under the first light path control mode
Corresponding first optical path is formed, the light of second band deflects enters imaging unit 15 after filter unit 14.This implementation
In example, since user has worn glasses, multiple reflections occur between glasses and ocular unit for the light of second band, due to this Shen
The special designing that please use light path control unit, can form in imaging unit to avoid the light of second band because of multiple reflections
Hot spot.
Eyeball tracking optical system provided in an embodiment of the present invention, comprising: light source unit, ocular unit and light path control list
Member.Light source unit, for emitting specified wavelength light, light can enter user's eye；Ocular unit is set relative to user's eye
It sets, light source unit is placed in ocular unit edge；Ocular unit is set between eye and light path control unit；Light path control unit
It is set in the optical path by ocular unit emergent light, and at a certain angle with optical axis；It is followed simultaneously in light path control unit
It is engraved under the first light path control mode and forms corresponding first optical path and form corresponding second under the second light path control mode
Optical path.The tracking to eyeball may be implemented, using light path control unit, so that the light for propagating to light path control unit follows simultaneously
It is engraved under the first light path control mode and forms corresponding first optical path and form corresponding second under the second light path control mode
Optical path splits the light into two-way, and the quality of ocular imaging can be improved, to improve the accuracy to eyeball tracking.
Embodiment two
Fig. 5 is a kind of structural schematic diagram of headset equipment provided in an embodiment of the present invention, as shown in figure 5, the wear-type
Equipment includes eyeball tracking optical system 210 and display screen 220.
Display screen 220 is various dimensions display screen, for showing various dimensions image.Eyeball tracking optical system 210 includes light
Source unit, ocular unit, light path control unit, filter unit and imaging unit.
Eyeball tracking device can be integrated in headset equipment in the present embodiment, to be chased after for carrying out eyeball to user
Track.Headset equipment includes but is not limited to the equipment such as AR equipment, VR equipment, glasses.It does not limit included by headset equipment herein
Remaining element, those skilled in the art can set according to the actual situation.
In addition, the display screen of the present embodiment can be various dimensions display screen.Various dimensions display screen can be used for preventing from wearing
The picture that formula equipment is shown causes vision influx to adjust conflict (i.e. VAC phenomenon).The revealable picture of various dimensions display screen can be with
There is depth information, that is, light is emitted from the point in space multistory, allows the vision influx of human eye and focus to match, light is not only
There is intensity also to have direction, that is, light field display technology.
The relationship of display screen and eyeball tracking device is not construed as limiting herein in headset equipment, and headset equipment can be based on
Content shown by the data control display screen that eyeball tracking device determines, can also be based on the content and eye shown by display screen
The data that ball follow-up mechanism determines determine the content that user watches attentively.
Embodiment three
Fig. 6 is a kind of flow chart for imaging method that the embodiment of the present invention three provides, and this method is as described in above-described embodiment
Eyeball tracking optical system execute, as shown in fig. 6, this method comprises the following steps:
Step 410, the specified wavelength illumination of light source unit transmitting injects user's eye.
Step 420, the light reflected by user's eye propagates to light path control unit through ocular unit.
Step 430, the light for propagating to light path control unit is followed to be formed under the first light path control mode in the same time and be corresponded to
The first optical path and corresponding second optical path is formed under the second light path control mode.
Wherein, light path control unit is set in the optical path by ocular unit emergent light, and at a certain angle with optical axis.
Light path control unit includes the first optical element and the second optical element, and the first optical element is configured in the first optical path control
Corresponding first optical path is formed under molding formula, the second optical element is configured to be formed under the second light path control mode and correspond to
The second optical path.First optical element includes at least one of dichroscope or beam splitter, further includes the first optical reflectance coating
System, the first optical reflection membrane system are fitted in dichroscope or splitter surface.Second optical element includes at least near infrared absorption
Membrane system or near-infrared are used to penetrate visible light through membrane system through one of membrane system, near infrared absorption membrane system or near-infrared, hinder
Only near infrared light reflects.
Wherein, the first light path control mode is configured to the light through first band and reflects the light of second band,
In the first optical path be under the first light path control mode reflected light road；Second light path control mode is configured to through the
The light and transmission of one wave band or the light for absorbing second band, wherein the second optical path is under the second light path control mode by first wave
The optical path of section transmission.
The principle of imaging may is that light source irradiates user's eye, and the light of second band is reflected in eye, reflected light warp
Light path control unit is traveled to after crossing ocular unit, the light of second band forms corresponding first under the first light path control mode
Optical path, the light of second band enter imaging unit along the first optical path after filter unit and are imaged.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (12)
1. a kind of eyeball tracking optical system characterized by comprising light source unit, ocular unit and light path control unit；
The light source unit, for emitting specified wavelength light, the light can enter user's eye；The ocular unit is opposite
It is arranged in user's eye, the light source unit is placed in ocular unit edge；The ocular unit is set to eye and the optical path
Between control unit；The light path control unit is set in the optical path by the ocular unit emergent light, and with optical axis at one
Fixed angle；It is followed in the light path control unit and forms corresponding first optical path under the first light path control mode in the same time
With corresponding second optical path is formed under the second light path control mode.
2. system according to claim 1, which is characterized in that the light path control unit includes the first optical element and the
Two optical elements, first optical element are configured to form corresponding first optical path under the first light path control mode,
Second optical element is configured to form corresponding second optical path under the second light path control mode.
3. system according to claim 2, which is characterized in that the first light path control mode is configured to through the
The light of one wave band and the light for reflecting second band, wherein first optical path is to be reflected under the first light path control mode
Optical path；The second light path control mode is configured to light and transmission through first band or absorbs second band
Light, wherein second optical path is under the second light path control mode by the light transmissive optical path of first band.
4. system according to claim 2, which is characterized in that first optical element includes at least dichroscope or divides
One of beam device.
5. system according to claim 2, which is characterized in that second optical element includes at least near infrared absorption film
System or near-infrared are used to penetrate visible light through membrane system through one of membrane system, near infrared absorption membrane system or near-infrared, prevent
Near infrared light reflection.
6. system according to claim 2, which is characterized in that the second optical element setting is in the first optics member
Part outer ring.
7. system according to claim 2, which is characterized in that first optical element and the setting of the second optical element can
Light-exposed transmitance is close.
8. system according to claim 3, which is characterized in that the light of the first band is visible light wave range；Second wave
The light of section is near infrared light wave band.
9. system according to claim 3, which is characterized in that further include: filter unit；
The filter unit is set in the first optical path, for filtering out the light of the first band.
10. system according to claim 9, which is characterized in that further include: imaging unit；
The imaging unit is set to after the filter unit, for receiving the second band filtered through the filter unit
Light, to eye and light source imaging.
11. a kind of headset equipment, which is characterized in that including the eyeball tracking optical system as described in claim 1-10 is any
And display screen；
The display screen is various dimensions display screen, for showing various dimensions image.
12. a kind of imaging method characterized by comprising
The specified wavelength illumination of light source unit transmitting injects user's eye；
The light reflected by user's eye propagates to light path control unit through ocular unit；
The light for propagating to light path control unit follow formed under the first light path control mode in the same time corresponding first optical path and
Corresponding second optical path is formed under the second light path control mode；The light path control unit is set to be gone out by the ocular unit
It penetrates in the optical path of light, and at a certain angle with optical axis.
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| CN201910188763.6A CN109725416B (en) | 2019-03-13 | 2019-03-13 | Eyeball tracking optical system, head-mounted equipment and imaging method |
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| CN201910188763.6A CN109725416B (en) | 2019-03-13 | 2019-03-13 | Eyeball tracking optical system, head-mounted equipment and imaging method |
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| WO2022111601A1 (en) * | 2020-11-27 | 2022-06-02 | 华为技术有限公司 | Eye movement tracking apparatus and electronic device |
| WO2023048984A1 (en) * | 2021-09-22 | 2023-03-30 | Kokanee Research Llc | Infrared coatings for gaze tracking systems |
| WO2023246813A1 (en) * | 2022-06-21 | 2023-12-28 | 北京七鑫易维信息技术有限公司 | Eye-tracking optical device, system, and virtual reality apparatus |
| WO2023246816A1 (en) * | 2022-06-21 | 2023-12-28 | 北京七鑫易维信息技术有限公司 | Eye-tracking optical system and head-mounted device |
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| CN205942609U (en) * | 2016-06-30 | 2017-02-08 | 北京上古视觉科技有限公司 | VR glasses with eye accuse and iris recognition function |
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| CN109725416B (en) | 2021-09-21 |
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