CN114488534A - AR glasses and related devices and methods - Google Patents
AR glasses and related devices and methods Download PDFInfo
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- CN114488534A CN114488534A CN202210095647.1A CN202210095647A CN114488534A CN 114488534 A CN114488534 A CN 114488534A CN 202210095647 A CN202210095647 A CN 202210095647A CN 114488534 A CN114488534 A CN 114488534A
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- 239000011521 glass Substances 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 44
- 210000000695 crystalline len Anatomy 0.000 claims abstract description 182
- 238000003384 imaging method Methods 0.000 claims abstract description 63
- 210000001508 eye Anatomy 0.000 claims abstract description 60
- 210000001747 pupil Anatomy 0.000 claims abstract description 57
- 230000004438 eyesight Effects 0.000 claims abstract description 51
- 230000008859 change Effects 0.000 claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 238000005259 measurement Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 24
- 239000004973 liquid crystal related substance Substances 0.000 claims description 17
- 230000003044 adaptive effect Effects 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 230000000644 propagated effect Effects 0.000 claims description 7
- 210000002858 crystal cell Anatomy 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 4
- 230000004304 visual acuity Effects 0.000 claims 3
- 238000007496 glass forming Methods 0.000 claims 1
- 210000001525 retina Anatomy 0.000 abstract description 23
- 230000003190 augmentative effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 17
- 208000001491 myopia Diseases 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000004379 myopia Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 206010020675 Hypermetropia Diseases 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000005252 bulbus oculi Anatomy 0.000 description 2
- 230000004305 hyperopia Effects 0.000 description 2
- 201000006318 hyperopia Diseases 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 206010047531 Visual acuity reduced Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/004—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid
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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
- G02B27/0093—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/12—Fluid-filled or evacuated lenses
- G02B3/14—Fluid-filled or evacuated lenses of variable focal length
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- Optics & Photonics (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention relates to the field of AR (augmented reality) glasses and discloses AR glasses and a related device and a vision self-adaption method thereof. The AR glasses include an AR frame; an AR frame for fixing the position of the AR glasses; the combined lens comprises a waveguide and a zoom lens, the zoom lens is fixed on the waveguide, the waveguide is installed on the AR spectacle frame, and a waveguide forward optical path channel comprises an entrance pupil area, an expansion pupil area and an exit pupil area. The zoom lens adjusts the curvature of the lens by externally applying direct current voltage, and automatic focusing is realized according to different methods to adapt to the vision of human eyes. A human eye vision self-adaptive method is applied to AR glasses, automatically adjusts the focal length of a zoom lens according to the change of retina imaging definition, and adapts to the vision of different human eyes. The other human eye vision self-adaptive method measures the vibration amplitude of the crystalline lens through a miniature vibration measuring device, automatically adjusts the focal length of the zoom lens according to the change of the vibration amplitude of the crystalline lens, and adapts to the vision of different human eyes.
Description
Technical Field
The invention relates to the field of AR (augmented reality) glasses, in particular to AR glasses and a related device and a vision self-adaption method thereof.
Background
AR intelligence glasses and VR intelligence glasses will become a fashion trend gradually, and nevertheless wear intelligent glasses and need be normal eyesight just can see the virtual reality picture clearly. For the myopia or hypermetropia people, the AR or VR glasses need to provide a vision degree adjusting scheme, so that the vision degree of the user with poor vision can be adjusted by himself or herself conveniently without wearing additional myopia or hypermetropia glasses.
Most VR glasses all have corresponding solution to the people that the eyesight is not good, because VR glasses can realize optical focusing, VR glasses allow the person of wearing to adjust the distance of every lens to the screen by oneself through the button and reach the effect of zooming, need not wear near-sighted glasses to the people that eyes are near-sighted or far-sighted like this also can see the virtual reality picture clearly. AR glasses are similar to ordinary glasses, and users with poor eyesight can only wear glasses by themselves or add the lenses with corresponding eyesight degrees before the AR lenses, and different users still need the lenses with different eyesight degrees, so that inconvenient AR experience is caused. Therefore, there is a need for AR eyewear technology that can automatically adjust the curvature of the lens for users with different vision.
Disclosure of Invention
The invention mainly aims to solve the technical problem that the existing AR glasses technology cannot adapt to users with different eyesight to automatically adjust the curvature of the lens.
A first aspect of the present invention provides AR glasses comprising:
an AR frame for fixing the position of the AR glasses;
a combined lens comprising a waveguide, a zoom lens, said zoom lens fixed on said waveguide, said waveguide mounted on said AR frame;
the zoom lens adjusts the curvature of the lens by applying direct current voltage, and automatic focusing is realized according to different methods to adapt to the vision of human eyes.
Optionally, in a first implementation manner of the first aspect of the present invention, the combined lens further includes: and the zoom lens and the waveguide are buckled in the buckling piece, and the zoom lens is fixed on the waveguide.
Optionally, in a second implementation manner of the first aspect of the present invention, the zoom lens includes: the liquid lens and the liquid crystal lens are used for changing the focal length of the automatic zoom lens from a positive value to a negative value and changing the focal length of the automatic zoom lens from the negative value to the positive value by adjusting the control voltage of the automatic zoom lens, so that the automatic zoom lens is suitable for people with different eyesight degrees.
Optionally, in a third implementation manner of the first aspect of the present invention, the liquid lens includes a conductive liquid and a non-conductive liquid, and is configured to adjust a lens curvature of the zoom lens by applying a dc voltage.
Optionally, in a fourth implementation manner of the first aspect of the present invention, the lc lens zoom lens includes a first plate conductive glass and a second plate conductive glass, an interlayer between the first plate conductive glass and the second plate conductive glass forms a liquid crystal cell structure, and the conductive liquid and the non-conductive liquid are encapsulated in the liquid crystal cell structure, so that a direct current voltage between the first plate conductive glass and the second plate conductive glass causes refractive index changes of the conductive liquid and the non-conductive liquid.
Optionally, in a fifth implementation manner of the first aspect of the present invention, the waveguide includes a forward optical path channel and a backward optical path channel, the forward optical path channel of the waveguide includes an entrance pupil region, an expansion pupil region, and an exit pupil region, and the backward optical path channel includes a backward optical path entrance pupil region and a backward optical path exit pupil region;
the backward light path entrance pupil area is arranged on one side in the exit pupil area and is on the same side as the TONG-in area; the backward optical path exit pupil area is arranged on one side of the backward optical path entrance pupil area and is on the same side as the TONG-in area;
an imaging device fixed to the waveguide by a connector;
the imaging device is arranged in a position opposite to an exit pupil area of the reverse light path and is respectively positioned at two sides of the waveguide with human eyes;
the entrance pupil area diffracts first incident light into second incident light, the second incident light enters the exit pupil area and is diffracted into first emergent light, the first emergent light is reflected into second emergent light by human eyes, the second emergent light is transmitted to the reverse light path entrance pupil grating and is diffracted into first imaging light, the first imaging light is transmitted to the reverse light path exit pupil grating and is diffracted into second imaging light, and the second imaging light is transmitted to the imaging device, so that the imaging device can measure the imaging definition of human eyes.
The invention provides a micro vibration measuring device, which is applied to the AR glasses and is arranged on one side of an AR glasses frame close to human eyes for measuring the crystalline lens vibration amplitude of the human eyes.
Optionally, in a first implementation manner of the second aspect of the present invention, the micro vibration measurement device includes a light source device, a light intensity detector, a reflector, and a beam splitter, the light source device excites measurement light to propagate to the beam splitter, the measurement light passes through the beam splitter and is diffracted into a first signal light, the first signal light propagates to the human eye and is reflected into a second signal light, the second signal light propagates to the beam splitter and is reflected into a third signal light, the third signal light propagates to the reflector and is reflected into a fourth signal light, the fourth signal light passes through the beam splitter and is diffracted into a fifth signal light, the fifth signal light propagates to the light intensity detector, the measurement light propagates to the beam splitter and is reflected into a reference light, and the reference light propagates to the light intensity detector, so that the reference light and the fifth signal light interfere with a change in light intensity of the light intensity detector The change of the phase difference is calculated, and the change of the vibration amplitude of the crystalline lens is calculated according to the change of the phase difference.
The third aspect of the present invention provides a method for adaptively focusing eye vision of AR glasses, which is applied to the AR glasses, and includes:
the human eye vision self-adaptive focusing method of the AR glasses comprises the following steps:
reading the imaging definition measured by the imaging device, and changing the external direct current voltage of the zoom lens according to a preset fixed trend, wherein the fixed trend comprises the following steps: an increasing trend, the increasing trend being against a corresponding decreasing trend;
judging whether the imaging definition is increased or not;
if the imaging definition is increased, changing the external direct current voltage of the zoom lens according to the fixed trend;
and if the imaging definition is not increased, reversely changing the external direct current voltage of the zoom lens according to the fixed trend.
The invention provides a method for adaptively focusing the vision of human eyes of a miniature vibration measuring device, which is applied to AR glasses and comprises the following steps:
reading the change of the light intensity value measured by the light intensity detector, calculating the change of the phase difference according to the change of the light intensity value, calculating the change of the vibration amplitude of the crystalline lens according to the change of the phase difference, and changing the external direct current voltage of the zoom lens according to a preset fixed trend, wherein the fixed trend comprises the following steps: an increasing trend, the increasing trend being against a corresponding decreasing trend;
judging whether the vibration amplitude is reduced or not;
if the vibration amplitude is reduced, changing the external direct current voltage of the zoom lens according to the fixed trend;
and if the vibration amplitude is not reduced, reversely changing the external direct current voltage of the zoom lens according to the fixed trend.
In the embodiment of the invention, the self-adaptive AR glasses of the intelligent glasses and the corresponding device of the AR glasses are provided, the automatic adjusting zoom lens (the liquid lens and the liquid crystal lens) is used, when a user wears the intelligent glasses, the control voltage of the automatic zoom lens is automatically adjusted according to the imaging definition of retina of human eyes or the vibration amplitude of crystalline lens, the self-adaptive AR glasses are adaptive to the vision degrees of different users, and the convenience and the comfort level of the experience of the AR glasses are improved.
Drawings
FIG. 1 is a schematic diagram of an AR glasses according to an embodiment of the present invention;
FIG. 2 is a schematic view of the assembly of the present invention;
FIG. 3 is a schematic diagram illustrating detection of the imaging sharpness of AR glasses according to an embodiment of the present invention;
FIG. 4 is a schematic view of the micro-vibration measuring device installed on AR glasses according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a micro vibration measurement apparatus according to an embodiment of the present invention.
FIG. 6 is a graph showing the variation of the amplitude of vibration of the lens as a function of whether the human eye sees an object according to an embodiment of the present invention;
FIG. 7a is a diagram illustrating a first example of detecting imaging of a focusing method of AR glasses according to an embodiment of the present invention;
FIG. 7b is a diagram illustrating a second example of detecting an image of the focusing method of AR glasses according to the embodiment of the present invention;
FIG. 7c is a diagram illustrating a third example of detecting imaging of the focusing method of AR glasses according to the embodiment of the present invention;
FIG. 8a is a diagram illustrating a first example of the optical path change of the focusing method of AR glasses according to an embodiment of the present invention;
FIG. 8b is a diagram illustrating a second example of the optical path change of the focusing method of AR glasses according to an embodiment of the present invention;
FIG. 8c is a diagram illustrating a third example of the optical path change of the focusing method of AR glasses according to the embodiment of the present invention;
FIG. 9a is a first schematic view of the variation of the vibration amplitude of the lens and the applied potential difference in the focusing condition of the microvibration measurement device in accordance with an embodiment of the present invention;
FIG. 9b is a second schematic view of the variation of the vibration amplitude of the lens and the applied potential difference in the focusing condition of the microvibration measurement device in accordance with an embodiment of the present invention;
FIG. 10 illustrates an embodiment of a method for focusing AR glasses in accordance with an embodiment of the present invention;
fig. 11 is a diagram illustrating an embodiment of a focusing method of a micro-vibration measuring device according to the present invention.
Description of the drawings:
100: assembling a lens;
10: a waveguide;
11: a zoom lens;
12: a fastener;
101: an entrance pupil region;
102: a pupil expanding region;
103: an exit pupil region;
201: a reverse optical path entrance pupil region;
202: a reverse optical path exit pupil region;
301: an imaging device;
302: a connecting member;
400: an AR frame;
500: a micro vibration measuring device;
51: a light source device;
52: a light intensity detector;
53: a mirror;
54: a beam splitter;
600: the human eye.
Detailed Description
The embodiment of the invention provides AR glasses and a related device and a vision self-adaption method thereof.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Moreover, the terms "comprises," "comprising," or "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For easy understanding, the following describes an embodiment of AR glasses according to an embodiment of the present invention, and referring to fig. 1, a schematic structural diagram of the AR glasses according to an embodiment of the present invention includes:
an AR frame (400) for fixing the position of the AR glasses;
the combined lens (100) comprises a waveguide (10) and a zoom lens (11), the zoom lens (11) is fixed on the waveguide (10), the waveguide (10) is installed on the AR spectacle frame (400), and the zoom lens (11) adjusts the curvature of the lens by applying direct-current voltage;
preferably, referring to fig. 2, the schematic view of the installation embodiment of the combined lens in the embodiment of the invention, the combined lens (100) further includes: and the clamping piece (12) is used for clamping the zoom lens (11) and the waveguide (10) in the clamping piece (12) to fix the zoom lens (11) on the waveguide (10), and the zoom lens (11) can be a liquid lens, a liquid crystal lens and the like.
The liquid lens contains conductive liquid and non-conductive liquid, one is conductive aqueous solution, the other is non-conductive oil, the appearance and the curvature of the crescent surface at the joint of the two different liquids, namely the focal length of the lens can be changed by adjusting the direct current voltage at the two ends of the container, and the focusing and zooming purposes can be achieved.
The liquid crystal lens is generally of a flat plate structure, a liquid crystal box structure is formed by interlayer liquid crystal between two pieces of conductive glass, the zoom lens (11) comprises first flat plate conductive glass and second flat plate conductive glass, the interlayer between the first flat plate conductive glass and the second flat plate conductive glass forms the liquid crystal box structure, and the conductive liquid and the non-conductive liquid are packaged in the liquid crystal box structure. The fundamental reason for the formation of the liquid crystal lens is that the refractive index of the liquid crystal is changed by applying voltage between the two pieces of conductive glass, so as to achieve the purpose of adjusting the focal length. The focal length of the automatic zoom lens can be changed from a positive value to a negative value by adjusting the control voltage of the automatic zoom lens, and the automatic zoom lens can also return to the positive value from the negative value, so that the automatic zoom lens is suitable for people with different eyesight degrees.
Specifically, the waveguide and the imaging device including the forward optical path channel and the reverse optical path channel according to the embodiment of the present invention are described below, and the waveguide and the imaging device are applied to the aforementioned AR glasses, and fig. 1 is a schematic installation diagram of the imaging device in the AR glasses.
The waveguide forward optical path channel (10) comprises an entrance pupil region (101), an expansion pupil region (102) and an exit pupil region (103); the waveguide reverse light path channel comprises a reverse light path entrance pupil area and a reverse light path exit pupil area; a reverse optical path entrance pupil region (201) on one side within the exit pupil region (103) and on the same side as the TONG-in region (101); a reverse optical path exit pupil region (202) on the same side of the reverse optical path entrance pupil region (201) as the TONG-in region (101); both the forward light path channel region and the reverse light path channel region of the waveguide adopt diffraction gratings (surface relief gratings or volume holographic gratings);
the imaging device can be a CCD, a CMOS, an NMOS and the like, is fixed on the back of the exit pupil area of the reverse light path, is opposite to the exit pupil area (202) of the reverse light path, is fixed on the waveguide (10) through a connecting piece (12), and is respectively positioned on two sides of the waveguide with human eyes.
Specifically, referring to fig. 3, an image sharpness detection schematic diagram of the AR glasses in the embodiment of the present invention, a first incident light ray is diffracted and propagated to the entrance pupil region (101) to be diffracted into a second incident light ray, the second incident light ray enters the exit pupil region (103) to be diffracted into a first emergent light ray, the first emergent light ray enters the human eye, light seen by the human eye according to the optical path reversibility can also return to the exit pupil region (103) in an original path, the first emergent light ray is reflected as a second emergent light ray by the human eye (600), and a reverse optical path entrance pupil grating (201) at the upper left corner of the exit pupil region (103) can receive light rays from the human eye state. Light rays from a human eye state enter the reverse light path entrance pupil grating (201) along a light propagation vector direction R1, second emergent light rays propagate to the reverse light path entrance pupil grating (201) and are diffracted into first imaging light rays, the first imaging light rays diffracted by the diffraction grating on the reverse light path entrance pupil grating (201) are totally reflected to the reverse light path exit pupil grating (202) in the waveguide along a vector direction R2, the diffracted second imaging light rays on the reverse light path exit pupil grating (202) enter the imaging device (301), the imaging device (301) can shoot the state of the human eye, and the imaging definition of the retina of the human eye is measured.
Specifically, the imaging device (301) is arranged on one side of the combined lens (100) far away from human eyes, and the imaging device (301) and the human eyes are respectively positioned on two sides of the waveguide (10).
Specifically, the imaging device (301) is arranged at the position, opposite to the light exit hole, of the reverse light path exit pupil grating (202), and the imaging definition of the retina of the human eye can be measured more accurately.
The following describes an embodiment of a micro-vibration measuring device according to an embodiment of the present invention, the micro-vibration measuring device is applied to the above AR glasses, and fig. 4 is a schematic view of the micro-vibration measuring device installed on the AR glasses, and the micro-vibration measuring device (500) is installed on one side of an AR glasses frame close to human eyes for measuring the imaging sharpness of the human eyes.
Specifically, referring to fig. 5, a schematic structural diagram of a micro vibration measurement apparatus in an embodiment of the present invention is shown, in which the micro vibration measurement apparatus (500) includes a light source device (51), a light intensity detector (52), a reflector (53), and a beam splitter (54), the light source device (51) excites a measurement light (S1) to propagate to the beam splitter (54), the measurement light (S1) passes through the beam splitter (54) to be diffracted into a first signal light (S2), the first signal light (S2) propagates to a human eye (600) to be reflected into a second signal light (S3), the second signal light (S3) propagates to the beam splitter (54) to be reflected into a third signal light (S4), the third signal light (S4) propagates to the reflector (53) to be reflected into a fourth signal light (S5), the fourth signal light (S5) passes through the beam splitter (54) to be diffracted into a fifth signal light (S6), and the fifth signal light (S6) propagates to the detector (52), the measuring light (S1) is transmitted to the spectroscope (54) and reflected as the reference light (S7), the reference light (S7) is transmitted to the light intensity detector (52), so that the reference light (S7) and the fifth signal light (S6) interfere the change of the light intensity in the light intensity detector (52), the change of the phase difference is calculated, the change of the vibration amplitude of the crystalline lens is calculated according to the change of the phase difference, and the smaller the vibration amplitude of the crystalline lens of the human eye is, the higher the definition of the human eye for seeing the object is.
Referring to the schematic diagram of the diffraction phase difference and the applied potential difference of the light intensity detector in fig. 6, the abscissa is the potential difference, the ordinate is the vibration amplitude of the crystalline lens, the crystalline lens of the human eye vibrates in the process of adjusting the visual object, the optical path difference between the signal light and the reference light changes, and the phase difference also changes. The light intensity detector detects the light intensity change of the interference fringes of the signal light and the reference light, so that the change of the phase difference can be obtained, and the vibration amplitude of the human eye lens can be obtained.
The curve is the vibration curve when the lens adjusts to see objects clearly. When people with poor eyesight gradually adjust the focal length of the eyeballs to see objects clearly, the vibration amplitude fluctuation of the crystalline lens is large, and when the eyeballs focus on the focal positions of the objects clearly, the vibration amplitude fluctuation of the crystalline lens is small and tends to be stable. The voltage of the zoom lens is continuously changed to a trend, and the vibration amplitude of the lens at the corresponding voltage is measured, and the amplitude measured before and after the comparison is performed. If the amplitude has a trend of gradually decreasing, the control voltage is changed to the same trend until the measured amplitude change of the crystalline lens is small or stable, then a signal is given out and stopped at the control voltage, and the focal length of the zoom lens under the voltage is kept to be adapted to the vision of human eyes; if the amplitude does not have the trend of gradually reducing, the voltage of the zoom lens is changed in the opposite direction until the measured amplitude change of the crystalline lens is small or stable, then a signal is given and stopped at the control voltage, and the focal length of the zoom lens at the voltage is kept to be suitable for the vision of human eyes.
As shown in fig. 10, the method for focusing AR glasses according to an embodiment of the present invention includes:
701. reading the imaging definition measured by the imaging device, and changing the external direct current voltage of the zoom lens according to a preset fixed trend, wherein the fixed trend comprises the following steps: an increasing trend, the increasing trend being against a corresponding decreasing trend;
702. judging whether the imaging definition is increased or not;
703. if the imaging definition is increased, changing the external direct current voltage of the zoom lens according to the fixed trend;
704. if the imaging definition is not increased, the external direct current voltage of the zoom lens is reversely changed according to the fixed trend.
In steps 701-704, the imaging definition of the retina is detected while the control voltage of the zoom lens is adjusted to capture the imaging state of the image in the human eye. The shooting frequency is the same as the voltage change frequency, the control voltage of the zoom lens is continuously changed towards a trend, meanwhile, the imaging definition of the retina is detected, and the measured definition of the image in the retina before and after comparison. If the image has a gradual change and clearness trend, changing the control voltage to the same trend until the detected moment when the retina is imaged clearest, then giving a signal to stop at the control voltage, and keeping the focal length of the zoom lens under the voltage to be adaptive to the vision of human eyes; if the image is more blurred than before, the voltage of the zoom lens is changed in the opposite direction until the detected moment when the retina is imaged most clearly, and then a signal is given to stop at the control voltage, and the focal length of the zoom lens at the voltage is kept to be suitable for the vision of human eyes.
Referring to fig. 7a-7c, which are diagrams illustrating examples of detection imaging of a focusing method of AR glasses according to an embodiment of the present invention, when a user with far vision wears the AR glasses, a control voltage adjustable zoom lens is used. The clear picture of the normal display picture of AR glasses, such as the picture shown in figure 7c, is shown in the AR glasses, the initial control voltage of the zoom lens is 40V, the imaging device shoots the image definition of the retina, such as the picture shown in figure 7a, continuously changes the control voltage of the zoom lens towards a trend, simultaneously detects the image definition of the retina, compares the image definition of the retina measured before and after, and then compares the image definition of the retina measured before and after, so that the image of the retina becomes clearer after the voltage is gradually reduced, the process from figure 7a to figure 7c is changed until the detected moment when the image of the retina is clearest, such as the picture 7c, and then a signal is given and stopped at the control voltage, and the focal length of the zoom lens kept at the voltage is adaptive to the vision of human eyes.
When a user with myopia wears the AR glasses, a clear picture such as a picture shown in figure 7c is normally displayed on the AR glasses, the initial control voltage of the zoom lens is 40V, the imaging device shoots the imaging definition of the retina such as figure 7a, the control voltage of the zoom lens is continuously changed towards a trend, the imaging definition of the retina is detected at the same time, the image definition of the retina is measured before and after the comparison, the image definition of the retina is measured, the image of the retina becomes clearer after the voltage is gradually increased, the process from figure 7a to figure 7c is changed until the detected moment when the image of the retina is clearest such as figure 7c, then a signal is given and stopped at the control voltage, and the focal length of the lens kept under the voltage is adaptive to the zoom vision of human eyes.
The user of normal eyesight when zoom lens's control voltage is 40V, can see clearly the object, and the formation of image of retina is clear, need not readjust control voltage.
As shown in fig. 8a-8c, which are exemplary diagrams of optical path changes of the focusing method of AR glasses, the voltage of the zoom lens is continuously changed toward a trend while measuring the vibration amplitude of the lens and adjusting the magnitude of the control voltage of the zoom lens, the measured frequency is the same as the frequency of the voltage change, and the vibration amplitudes of the lens under the corresponding voltages are measured at the same time, and the amplitudes measured before and after are compared. If the amplitude has a trend of gradually decreasing, the control voltage is changed to the same trend until the measured amplitude change of the crystalline lens is small or stable, then a signal is given out and stopped at the control voltage, and the focal length of the zoom lens under the voltage is kept to be adapted to the vision of human eyes; if the amplitude does not have the trend of gradually reducing, the voltage of the zoom lens is changed in the opposite direction until the measured amplitude change of the crystalline lens is small or stable, then a signal is given and stopped at the control voltage, and the focal length of the zoom lens at the voltage is kept to be suitable for the vision of human eyes.
A combined lens of a variable focus lens and an AR waveguide with adjustable control voltage is used, as shown in fig. 8a, the control voltage V1 is 20V, and the variable focus lens is a convex lens with a focal length of 0.17 m; as shown in fig. 8b, the zoom lens control voltage V2 is 40V, which is an initial voltage, and at this time, the zoom lens is a parallel flat plate, and light directly passes through the zoom lens, so as to adapt to normal human eyesight; as shown in fig. 8c, the zoom lens control voltage V3 is 60V, and the zoom lens is a concave lens with a focal length of-0.17 m. Adjusting the control voltage from V2 to V1, wherein the zoom lens is a convex lens, the focal length changes from 1m to 0.17m, the distance vision power changes from 100 to 600 degrees, and the zoom lens is suitable for the power of the distance vision eyes; the control voltage is adjusted from V2 to V3, the zoom lens is a concave lens, the focal length changes from-1 m to-0.17 m, the myopic vision power changes from 100 to 600 degrees, and the lens is suitable for the myopic eyes.
As shown in fig. 11, which is an embodiment of a focusing method for a micro vibration measurement apparatus, the focusing method for a micro vibration measurement apparatus according to an embodiment of the present invention is applied to eye vision adaptation of AR glasses, and the focusing method for a micro vibration measurement apparatus includes:
901. reading the change of the light intensity value measured by the light intensity detector, calculating the change of the phase difference according to the change of the light intensity value, calculating the change of the vibration amplitude of the crystalline lens according to the change of the phase difference, and changing the external direct current voltage of the zoom lens according to a preset fixed trend, wherein the fixed trend comprises the following steps: an increasing trend, the increasing trend being against a corresponding decreasing trend;
902. judging whether the vibration amplitude is reduced or not;
903. if the vibration amplitude is reduced, changing the external direct current voltage of the zoom lens according to the fixed trend;
904. if the vibration amplitude is not reduced, the external direct current voltage of the zoom lens is reversely changed according to the fixed trend.
In the 901-904 step, reference can be made to fig. 9a-9b to illustrate the variation of the vibration amplitude of the lens and the applied potential difference in the focusing condition of the micro vibration measurement device.
When a user with 200 degrees of far vision wears the AR glasses with the miniature vibration measuring device, as shown in fig. 9a, the voltage of the zoom lens is adjusted from the initial voltage of 40V, the voltage of the zoom lens is continuously changed toward a trend, meanwhile, the vibration amplitude of the lens under the corresponding voltage is measured, the amplitude measured before and after the comparison is carried out, it can be known that after the voltage is gradually reduced, the vibration amplitude of the lens is also gradually reduced, the voltage is continuously adjusted to 25V toward the direction of reduction, the voltage is stopped to adjust, the zoom lens is kept at the focal length, and the AR glasses are adapted to the vision of the user with 200 degrees of far vision.
When a user with 200 degrees of myopia wears the AR glasses with the miniature vibration measurement device, the voltage of the zoom lens is adjusted from the initial voltage of 40V as shown in fig. 9b, the voltage of the zoom lens is continuously changed towards a trend, meanwhile, the vibration amplitude of the crystalline lens under the corresponding voltage is measured, and the amplitude measured before and after the comparison is carried out, so that after the voltage is gradually increased, the vibration amplitude of the crystalline lens is gradually reduced, the voltage is continuously increased towards the 55V, only slight fluctuation but approximate stability of the vibration amplitude of the crystalline lens is detected, the voltage is stopped to be adjusted, and the zoom lens is kept at the focal length to adapt to the vision of the user with 200 degrees of myopia.
The user with normal vision can see objects clearly when the control voltage of the zoom lens is 40V, the vibration amplitude of the crystalline lens is not fluctuated greatly, and the control voltage does not need to be adjusted.
In the embodiment of the invention, the self-adaptive AR glasses of the intelligent glasses and the corresponding device of the AR glasses are provided, the automatic adjusting zoom lens (the liquid lens and the liquid crystal lens) is used, when a user wears the intelligent glasses, the control voltage of the automatic zoom lens is automatically adjusted according to the imaging definition of retina of human eyes or the vibration amplitude of crystalline lens, the self-adaptive AR glasses are adaptive to the vision degrees of different users, and the convenience and the comfort level of the experience of the AR glasses are improved.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses, and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. AR glasses, characterized in that the AR glasses comprise:
an AR frame for fixing the position of the AR glasses;
a combination optic comprising a waveguide, a zoom lens, said zoom lens secured to said waveguide, said waveguide mounted on said AR frame;
the zoom lens adjusts the curvature of the lens by applying direct current voltage, and automatic focusing is realized according to different methods to adapt to the vision of human eyes.
2. The AR glasses according to claim 1, wherein the combined lens further comprises: and the zoom lens and the waveguide are buckled in the buckling piece, and the zoom lens is fixed on the waveguide.
3. The AR glasses according to claim 1, wherein the zoom lens comprises: the liquid lens and the liquid crystal lens are used for changing the focal length of the automatic zoom lens from a positive value to a negative value and changing the focal length of the automatic zoom lens from the negative value to the positive value by adjusting the control voltage of the automatic zoom lens, so that the automatic zoom lens is suitable for people with different eyesight degrees.
4. The AR glasses according to claim 3, wherein the liquid lens contains conductive and non-conductive liquids for adjusting the lens curvature of the zoom lens by an applied dc voltage.
5. The AR glasses according to claim 3, wherein the liquid crystal zoom lens comprises a first plate conductive glass and a second plate conductive glass, an interlayer between the first plate conductive glass and the second plate conductive glass forming a liquid crystal cell structure, and the conductive liquid and the non-conductive liquid are encapsulated in the liquid crystal cell structure, such that a direct current voltage between the first plate conductive glass and the second plate conductive glass causes a refractive index change in the conductive liquid and the non-conductive liquid.
6. The AR glasses according to claim 1, wherein the waveguide comprises a forward optical path channel and a reverse optical path channel, the forward optical path channel comprising an entrance pupil region, an exit pupil region, and the reverse optical path channel comprising a reverse optical path entrance pupil region and a reverse optical path exit pupil region;
the backward light path entrance pupil area is arranged on one side in the exit pupil area and is on the same side as the TONG-in area; the backward optical path exit pupil area is arranged on one side of the backward optical path entrance pupil area and is on the same side as the TONG-in area;
an imaging device fixed to the waveguide by a connector;
the imaging device is arranged in a position opposite to an exit pupil area of the reverse light path and is respectively positioned at two sides of the waveguide with human eyes;
the entrance pupil area diffracts first incident light into second incident light, the second incident light enters the exit pupil area and is diffracted into first emergent light, the first emergent light is reflected into second emergent light by human eyes, the second emergent light is transmitted to the reverse light path entrance pupil grating and is diffracted into first imaging light, the first imaging light is transmitted to the reverse light path exit pupil grating and is diffracted into second imaging light, and the second imaging light is transmitted to the imaging device, so that the imaging device can measure the imaging definition of human eyes.
7. A micro-vibration measuring device, wherein the micro-vibration measuring device is applied to the AR glasses of any one of claims 1 to 5, and the micro-vibration measuring device is mounted on one side of the AR glasses frame close to the human eye and used for measuring the vibration amplitude of the crystalline lens of the human eye.
8. The micro vibration measurement device according to claim 7, wherein the micro vibration measurement device comprises a light source device, a light intensity detector, a reflector, a beam splitter, the light source device exciting a measurement light to propagate to the beam splitter, the measurement light being diffracted into a first signal light through the beam splitter, the first signal light being propagated to a human eye to be reflected into a second signal light, the second signal light being propagated to the beam splitter to be reflected into a third signal light, the third signal light being propagated to the reflector to be reflected into a fourth signal light, the fourth signal light being diffracted into a fifth signal light through the beam splitter, the fifth signal light being propagated to the light intensity detector, the measurement light being propagated to the beam splitter to be reflected into a reference light, the reference light being propagated to the light intensity detector, so that the reference light and the fifth signal light interfere with the change of light intensity in the light intensity detector, the change of phase difference is calculated, and the change of the vibration amplitude of the crystalline lens is calculated according to the change of the phase difference.
9. An adaptive focusing method for human eye vision of AR glasses, the adaptive focusing method for human eye vision of AR glasses being applied to the AR glasses according to any one of claims 1 to 6, the adaptive focusing method for human eye vision of AR glasses comprising:
reading the imaging definition measured by the imaging device, and changing the external direct current voltage of the zoom lens according to a preset fixed trend, wherein the fixed trend comprises the following steps: an increasing trend, the increasing trend being against a corresponding decreasing trend;
judging whether the imaging definition is increased or not;
if the imaging definition is increased, changing the external direct current voltage of the zoom lens according to the fixed trend;
and if the imaging definition is not increased, reversely changing the external direct current voltage of the zoom lens according to the fixed trend.
10. A method for focusing on the visual acuity of a miniature vibration measurement device, wherein the method for focusing on the visual acuity of a miniature vibration measurement device is applied to the miniature vibration measurement device as set forth in any one of claims 7 to 8, and the method for focusing on the visual acuity of a miniature vibration measurement device comprises:
reading the change of the light intensity value measured by the light intensity detector, calculating the change of the phase difference according to the change of the light intensity value, calculating the change of the vibration amplitude of the crystalline lens according to the change of the phase difference, and changing the external direct current voltage of the zoom lens according to a preset fixed trend, wherein the fixed trend comprises the following steps: an increasing trend, the increasing trend being against a corresponding decreasing trend;
judging whether the vibration amplitude is reduced or not;
if the vibration amplitude is reduced, changing the external direct current voltage of the zoom lens according to the fixed trend;
and if the vibration amplitude is not reduced, reversely changing the external direct current voltage of the zoom lens according to the fixed trend.
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