WO2023197849A1 - 双目辐辏可调节的ar眼镜和双目辐辏调节方法 - Google Patents

双目辐辏可调节的ar眼镜和双目辐辏调节方法 Download PDF

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Publication number
WO2023197849A1
WO2023197849A1 PCT/CN2023/083762 CN2023083762W WO2023197849A1 WO 2023197849 A1 WO2023197849 A1 WO 2023197849A1 CN 2023083762 W CN2023083762 W CN 2023083762W WO 2023197849 A1 WO2023197849 A1 WO 2023197849A1
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WO
WIPO (PCT)
Prior art keywords
light
optical
glasses
coupling
optical waveguide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/083762
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English (en)
French (fr)
Inventor
杜佳玮
张泽霖
刘冰玉
李泓
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Ningbo Sunny Opotech Co Ltd
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Ningbo Sunny Opotech Co Ltd
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Filing date
Publication date
Application filed by Ningbo Sunny Opotech Co Ltd filed Critical Ningbo Sunny Opotech Co Ltd
Priority to CN202380026885.XA priority Critical patent/CN118922765A/zh
Publication of WO2023197849A1 publication Critical patent/WO2023197849A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • 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
    • G02B2027/0178—Eyeglass type

Definitions

  • the present invention relates to AR glasses, and in particular to AR glasses with adjustable binocular vergence and a binocular vergence adjustment method.
  • the image light projected by the optical machine in the existing AR glasses is vertically coupled in and out of the working surface of the optical waveguide.
  • This method makes the convergence distance of the AR glasses infinite, and the optical machine and light of the existing AR glasses are vertically coupled in and out.
  • the position of the waveguide is not adjustable, so the convergence distance of AR glasses is generally not adjustable.
  • the focusing distance of the lens is the distance from the actual displayed object to the eyeball
  • the binocular vergence distance is the distance from the virtual object displayed by the AR glasses to the eyeball in the user's perception.
  • the convergence distance of AR glasses is infinite. Since the distance between the display object that the user focuses on in real time and the eyeball is different, the focus distance is also changing in real time. Therefore, the inconsistency between the two distances will cause convergence conflict. As for bringing dizziness and other uncomfortable experiences to users wearing AR glasses.
  • An object of the present invention is to provide binocular vergence-adjustable AR glasses and a binocular vergence adjustment method, wherein the binocular vergence of the AR glasses is adjustable to allow the AR glasses to bring a good visual experience to the user. .
  • One object of the present invention is to provide binocular vergence-adjustable AR glasses and a binocular vergence adjustment method, wherein the AR glasses are provided with a light steering element between an optical machine and an optical waveguide, and the angle of the light steering element is adjusted by adjusting the angle of the light steering element.
  • the method adjusts the direction in which the image light projected by the optical machine is coupled into the optical waveguide, thereby adjusting the binocular vergence of the AR glasses.
  • One object of the present invention is to provide binocular vergence-adjustable AR glasses and a binocular vergence adjustment method, wherein the AR glasses drive the light steering element to rotate through a driver to adjust the angle of the light steering element.
  • the driver can drive the light steering element to rotate around a specific rotation axis to adjust the angle of the light steering element, the straight line where the rotation axis of the light steering element is located and the angle of the projection lens of the light machine.
  • the straight line where the optical axis is located is vertical to accurately adjust the binocular vergence of the AR glasses.
  • An object of the present invention is to provide binocular vergence-adjustable AR glasses and a binocular vergence adjustment method.
  • Method wherein the AR glasses are provided with the driver between the two light turning elements, so that the driver drives the two light turning elements to rotate synchronously and with the same amplitude.
  • the driver is a magnetostrictive driver, which is located between the two light turning elements to drive the two light turning elements to rotate synchronously and with the same amplitude through contraction or extension.
  • the present invention provides a pair of AR glasses with adjustable eye convergence, which includes:
  • Optical waveguide wherein the optical waveguide is provided on the main body of the glasses;
  • optical machine wherein the optical machine is provided on the main body of the glasses.
  • a convergence adjustment unit wherein the convergence adjustment unit includes a light turning element, the angle of the light turning element is adjustably arranged between the optical machine and the optical waveguide, wherein the light turning element is used to make the light turning element
  • the image light projected by the optical machine is turned, and the image light that undergoes the turning effect can be coupled in through the coupling area of the optical waveguide and coupled out through the coupling area of the optical waveguide.
  • the AR glasses include two of the optical waveguides and two of the optical machines, the optical machines and the optical waveguides are arranged in parallel, wherein the convergence adjustment unit includes two Each of the light turning elements is respectively disposed between each of the optical machines and each of the optical waveguides.
  • the AR glasses include one optical waveguide and two optical machines, the optical machines and the optical waveguides are arranged in parallel, wherein the convergence adjustment unit includes two optical machines.
  • the light steering element is each disposed between each of the optical machines and each coupling area of the optical waveguide.
  • the AR glasses include two of the optical machines, the optical machines and the optical waveguide are arranged vertically, wherein the convergence adjustment unit includes two of the light turning elements, wherein
  • the AR glasses further include two light-turning parts, each of the light-turning parts is respectively disposed between each of the light machines and each of the light-turning elements, and each of the light-turning elements is respectively disposed on Between each of the light converting parts and each of the optical waveguides, the image light projected by the optical machine can radiate in the direction of the light turning element after being turned by the light converting part.
  • the AR glasses include one of the optical engines, the optical engine and the optical waveguide are arranged in parallel, wherein the convergence adjustment unit includes a semi-reflective and semi-transparent element, and the semi-reflective element
  • the convergence adjustment unit includes a semi-reflective and semi-transparent element, and the semi-reflective element
  • the angle of the semi-transparent element is adjustably arranged between the optical engine and one of the optical waveguides, and the optical engine and the light turning element are located on opposite sides of the semi-reflective element, wherein
  • the semi-reflective element It is used to turn the image light projected by the optical machine and couple it through a coupling area of the optical waveguide, and then radiate the image light toward the light turning element after passing through it.
  • the convergence adjustment unit includes a driver, and the light steering element is drivably connected to the driver, so that the driver drives the light steering element to rotate to adjust the light steering element. the tilt angle.
  • the driver is a magnetostrictive driver, which includes a first magnetostrictive part and a second magnetostrictive part, and opposite ends of the first magnetostrictive part are connected respectively. At one end of the two light redirecting elements, opposite ends of the second magnetostrictive part are respectively connected to the other ends of the two light redirecting elements.
  • the convergence adjustment unit includes two drivers, the transflective element is drivably connected to one of the drivers, and the light turning element is drivably connected to the other of the drivers. driver.
  • the present invention further provides a binocular vergence adjustment method for AR glasses, wherein the binocular vergence adjustment method includes the following steps:
  • the binocular vergence adjustment method further includes the steps:
  • step (d) Determine the deflection angle provided on the light steering element according to the focusing distance of the lens of the eyeball, wherein in step (b), the tilt angle of the light steering element is adjusted according to the determined deflection angle.
  • the AR glasses are respectively provided with one light steering element between the two optical waveguides and the two optical machines, and the optical waveguides and the optical machines are arranged in parallel. It is provided that in the step (a), the image light projected by each of the optical machines is coupled from the coupling area of each of the optical waveguides after being deflected by each of the light steering elements, In step (b), the tilt angle of each light steering element is adjusted respectively to change the angle at which the image light projected by each optical machine is coupled from the coupling area of each optical waveguide. and the angle at which the light is coupled out of the self-coupling out region, and from each of the light The image light coupled out of the coupling area of the waveguide can form an included angle.
  • the AR glasses are respectively provided with one of the light turning elements between two coupling areas of one of the optical waveguides and the two of the optical machines, and the optical waveguide and the The optical machines are arranged in parallel, wherein in the step (a), the image light projected by each of the optical machines is separated from each coupler of the optical waveguide after being deflected by each of the light steering elements. Coupling into the entrance area, wherein in the step (b), the tilt angle of each of the light turning elements is adjusted respectively to change the coupling of the image light projected by each of the optical machines from each of the optical waveguides.
  • the included angle can be formed between the coupling-in angle of the optical waveguide and the coupling-out angle of the self-coupling out-region, and the image light coupled out from each coupling-out region of the optical waveguide.
  • the AR glasses are respectively provided with one light steering element and one turning part between the two optical waveguides and the two optical machines, and the optical waveguide and the light engine
  • the machine is arranged vertically, wherein in the step (a), the image light projected by each of the light machines respectively passes through the rotation of each of the light turning parts and each of the light turning elements.
  • the coupling area of each optical waveguide is coupled, wherein in step (b), the tilt angle of each light steering element is adjusted respectively to change the image light projected by each optical machine from each The coupling angle of the coupling region of the optical waveguide.
  • the AR glasses are provided with a transflective element between one of the optical waveguides and the optical engine, and between the other optical waveguide and the transflective element.
  • One of the light turning elements is provided, wherein in the step (a), the image light projected by the optical machine is coupled from the coupling area of one of the optical waveguides after being diverted by the transflective element.
  • the image light projected by the optical machine is coupled from the coupling area of the other optical waveguide after passing through the transflective element and the steering effect of the light steering element, wherein in the step In (b), the tilt angles of the transflective element and the light steering element are respectively adjusted to change the angle at which the image light projected by the optical machine is coupled from the coupling area of each optical waveguide.
  • step (b) the inclination angles of the two light turning elements are adjusted respectively.
  • step (b) the inclination angles of the two light turning elements are adjusted synchronously.
  • the inclination angles of the two light turning elements are adjusted with the same amplitude and in opposite directions.
  • a first magnetostrictive part is provided between one end of the two light turning elements, and between the other ends of the two light turning elements.
  • Set second Magnetostrictive part wherein when the first magnetostrictive part contracts and the second magnetostrictive part expands, one of the light turning elements rotates counterclockwise and the other light turning element rotates clockwise, in the When the first magnetostrictive part expands and the second magnetostrictive part contracts, one of the light turning elements rotates clockwise and the other light turning element turns counterclockwise.
  • Figure 1 is a schematic perspective view of an AR glasses according to a preferred embodiment of the present invention.
  • FIG. 2 is a schematic diagram of the wearing state of the AR glasses according to the above-mentioned preferred embodiment of the present invention.
  • 3A to 3D are respectively schematic diagrams of the binocular vergence adjustment process of the AR glasses according to the above-mentioned preferred embodiment of the present invention.
  • FIG. 4 is a schematic perspective view of an AR glasses according to another preferred embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the relative relationship between the optical machine, the optical waveguide and the convergence adjustment unit of the AR glasses according to the above-mentioned preferred embodiment of the present invention.
  • FIG. 6 is a schematic diagram of the relative relationship between the optical machine, the optical waveguide and the convergence adjustment unit of an AR glasses according to another preferred embodiment of the present invention.
  • the term "a” should be understood as “at least one” or “one or more”, that is, in one embodiment, the number of an element may be one, and in other embodiments, the number of The number of elements may be multiple, and the term “one” shall not be construed as a limitation on the number.
  • binocular convergence-adjustable AR glasses according to a preferred embodiment of the present invention will be disclosed and elaborated in the following description, wherein the AR glasses include A glasses body 10, at least one optical waveguide 20, at least one optical engine 30 and at least one convergence adjustment unit 40.
  • the glasses body 10 is configured to allow the user to wear the AR glasses on the head.
  • the glasses body 10 includes a frame 11 and two temple legs 12 .
  • the two temple legs 12 respectively extend downwardly and rearwardly from opposite sides of the frame 11 , wherein
  • the middle part of the frame 11 of the glasses main body 10 is placed above the bridge of the user's nose, and the two temples 12 of the glasses main body 10 are respectively placed against the user's nose. above both of the user's ears.
  • the AR glasses include two optical waveguides 20, wherein each optical waveguide 20 has a coupling-in area 21 and an out-coupling area 22 respectively.
  • the image light projected by the machine 30 can be coupled in through the coupling area 21 of the optical waveguide 20 and coupled out through the coupling area 22 of the optical waveguide 20 .
  • Each optical waveguide 20 is respectively disposed on each side of the frame 11 of the glasses main body 10 , wherein when the user wears the AR glasses on the head, the glasses main body 10 is used to hold each optical waveguide 20 respectively.
  • the optical waveguide 20 is in front of each eyeball of the user, and each eyeball of the user corresponds to the decoupling area 22 of each optical waveguide 20, so that when the image light projected by the optical engine 30 passes through When the coupling-out area 22 of the optical waveguide 20 is coupled out, the user's eyeballs can receive the image light to obtain a visual experience.
  • the AR glasses include one optical waveguide 20, wherein the optical waveguide 20 has two coupling-in areas 21 and two out-coupling areas 22. , when the user wears the AR glasses on the head, the glasses main body 10 is used to hold the optical waveguide 20 in front of the user's eyeballs, and each eyeball of the user corresponds to the optical waveguide 20 respectively.
  • Each of the coupling areas 22 so that when the image projected by the optical machine 30 is coupled out through each of the coupling areas 22 of the optical waveguide 20 , the user's eyeballs can receive the image light to obtain a visual experience.
  • the optical engine 30 is disposed on the glasses body 10 , and the image light projected by the optical engine 30 can be coupled into the optical waveguide 20 through the coupling area 21 of the optical waveguide 20 .
  • the AR glasses include two optical machines 30 , and each of the optical machines 30 is respectively disposed on the glasses. the middle part of the frame 11 of the main body 10, and each Each of the optical machines 30 corresponds to each of the waveguides 20 , so that the image light projected by each of the optical machines 30 can be coupled into each optical machine through the coupling region 21 of each of the optical waveguides 20 .
  • the optical waveguide 20 is disposed on the glasses body 10 , and the image light projected by the optical engine 30 can be coupled into the optical waveguide 20 through the coupling area 21 of each of the optical waveguides 20 .
  • the convergence adjustment unit 40 includes at least one light steering element 41.
  • the light steering element 41 is disposed between the optical waveguide 20 and the optical engine 30. When the image light projected by the optical engine 30 reaches the After the light steering element 41 is described, the light steering element 41 is used to deflect the image light and then couple it into the optical waveguide 20 and all the light from the optical waveguide 20 through the coupling area 21 of the optical waveguide 20 .
  • the coupling-out region 22 couples out the optical waveguide 20 .
  • the light turning element 41 is a reflective element, such as a mirror, which has a reflective surface, and the reflection of the light turning element 41 Facing the coupling area 21 of the optical waveguide 20 and the optical engine 30 , when the image light projected by the optical engine 30 reaches the reflective surface of the light steering element 41 , the light steering element 41 .
  • the reflection mode diverts the image light reaching the light steering element 41, and after being diverted, the image light can be coupled into and out of the optical waveguide 20 through the coupling region 21 of the optical waveguide 20.
  • the coupling region 22 of 20 couples out the optical waveguide 20 .
  • the light turning element 41 may be a refractive element, such as a refractive lens.
  • the light turning element 41 turns the image light reaching the light turning element 41 in a refractive manner, and after being turned, the image light can be coupled into the optical waveguide 20 through the coupling area 21 of the optical waveguide 20 and the optical waveguide 20 is coupled out from the coupling-out region 22 of the optical waveguide 20 .
  • the optical waveguide 20 and the optical engine 30 are arranged in parallel, so that the optical axis of the projection lens of the optical engine 30 and the optical axis of the optical waveguide 20 are aligned with each other.
  • the coupling area 21 is parallel, wherein the light turning element 41 is arranged obliquely to allow the reflective surface of the light turning element 41 to face the coupling area 21 of the optical waveguide 20 and the optical machine 30, through In this way, when the image light projected by the optical engine 30 reaches the reflective surface of the light steering element 41, the reflective surface of the light steering element 41 reflects the image light projected by the optical engine 30 and turns it.
  • the image light can be coupled into the optical waveguide 20 through the coupling region 21 of the optical waveguide 20 and coupled out of the optical waveguide 20 from the coupling region 22 of the optical waveguide 20 .
  • the inclination angle of the light steering element 41 in the initial state is 45°.
  • the light steering element 41 causes the steering angle of the image light to be 90°.
  • the convergence adjustment unit 40 includes two light turning elements 41 , wherein each light turning element 41 is respectively disposed on each of the optical waveguides 20 and each of the optical waveguides 20 .
  • each light turning element 41 is respectively disposed on each of the optical waveguides 20 and each of the optical waveguides 20 .
  • an optical engine 30 and a light turning element 41 form an independent imaging system.
  • the AR glasses include one glasses main body 10 and two imaging systems provided on the glasses main body 10 .
  • Each of the imaging systems includes one of the optical waveguides 20 and one of the optical machines. 30 and a light turning element 41 disposed between the optical waveguide 20 and the optical engine 30, wherein when the user wears the AR glasses on the head, the glasses body 10 holds each of the The optical waveguide 20 of the imaging system is in front of each eyeball of the user.
  • each of the light turning elements 41 turns the image light projected by each of the light engines 30 through each light turning element.
  • the coupling region 21 of the optical waveguide 20 couples into each optical waveguide 20.
  • the AR glasses can provide virtual images in front of the user's eyes.
  • the optical waveguide 20 and the optical engine 30 are arranged in parallel, and in the initial state, the inclination angle of the light turning element 41 is 45°, so the image light projected by the optical engine 30 is reflected by the light. After reflection from the reflective surface of the steering element 41, the light is vertically coupled into the optical waveguide through the coupling area 21 of the optical waveguide 20. At this time, the binocular convergence distance of the AR glasses is infinite.
  • the inclination angle of the light steering element 41 of the convergence adjustment unit 40 of the AR glasses of the present invention is set to an adjustable Adjust to adjust the binocular vergence of the AR glasses.
  • the tilt angle of the two light steering elements 41 when adjusting the tilt angle of the two light steering elements 41 , the image light projected by the two optical machines 30 is emitted from the two optical waveguides 20
  • the coupling-in angle of the coupling-in region 21 and the coupling-out angle from the coupling-out region 22 can be changed to allow the image light coupled out from the coupling-out region 22 of the two optical waveguides 20 to be An included angle is formed between them, and the included angle is greater than 0 degrees, thus adjusting the binocular vergence of the AR glasses.
  • the tilt angle of the light steering element 41 can be adjusted by driving the light steering element 41 to rotate, thereby adjusting the binocular vergence of the AR glasses.
  • the convergence adjustment unit 40 includes at least one driver 42, the driver 42 is configured to drive the light steering element 41 to rotate, so as to adjust the inclination angle of the light steering element 41, thereby allowing the movement of the light steering element 41 from the two points.
  • the image light coupled out of the coupling area 22 of the optical waveguide 20 forms an included angle to adjust the binocular vergence of the AR glasses.
  • the straight line where the rotation axis of the light steering element 41 is located and the straight line where the optical axis of the projection lens of the optical machine 30 is located are perpendicular and intersect, so as to accurately adjust the binocular vergence of the AR glasses.
  • the driver 42 is a magnetostrictive driver, which includes a first magnetostrictive part 421 and a second magnetostrictive part 422 , wherein the first magnetostrictive part 422 .
  • the opposite ends of the telescopic part 421 are respectively connected to the upper ends of the two light redirecting elements 41
  • the opposite ends of the second magnetostrictive part 422 are respectively connected to the lower ends of the two light redirecting elements 41 .
  • the light turning element 41 on the left side is driven to rotate counterclockwise to change the image light projected by the optical machine 30 on the left side and is coupled from the coupling area 21 of the optical waveguide 20 on the left side into the left side.
  • the light turning element 41 on the right side is driven to rotate clockwise to change the image light projected by the optical engine 30 on the right side from the optical waveguide 20 on the right side.
  • the coupling area 21 couples into the direction of the optical waveguide 20 on the right side, thus adjusting the binocular vergence of the AR glasses.
  • power is supplied to the first magnetostrictive part 421 to extend the first magnetostrictive part 421 and power is supplied to the second magnetostrictive part 422 to cause the second magnetostrictive part 422 to expand.
  • the light turning element 41 on the left side is driven to rotate clockwise to change the image light projected by the light engine 30 on the left side from the coupling area 21 of the optical waveguide 20 on the left side.
  • the light turning element 41 on the right is driven to rotate counterclockwise to change the image light projected by the optical engine 30 on the right from the light on the right.
  • the coupling area 21 of the optical waveguide 20 couples into the direction of the optical waveguide 20 on the right side, thus adjusting the binocular vergence of the AR glasses.
  • the opposite ends of the first magnetostrictive part 421 and the opposite ends of the second magnetostrictive part 422 of the driver 42 are contracted or extended synchronously and with the same amplitude, so as to allow two The rotation of the light steering elements 41 is synchronous and the rotation angles are consistent.
  • the driver 42 of the convergence adjustment unit 40 may be, but is not limited to, a DC motor, a piezoelectric ceramic drive structure, and an SMA drive structure.
  • the AR glasses further include an eye tracking unit 50 and a control unit 60.
  • the eye tracking unit 50 and the control unit 60 are respectively provided on the glasses body 10, and the The eye tracking unit 50 and the driver 42 of the convergence adjustment unit 40 are respectively connected to the control unit 60 .
  • the eye tracking module 40 is configured to track the user's line of sight, determine the distance from the focus position to the eyeball and other information, and feed back relevant information to the control unit 60.
  • the control unit 60 is configured to calculate the adjustment amount and transmitted to the convergence adjustment unit 40 Driver 42, the driver 42 adjusts the angle of the light steering element 41 according to the instruction, thus changing the image light projected by the optical engine 30 from the coupling area 21 of the optical waveguide 20 into the optical waveguide. 20 direction to adjust the binocular vergence of the AR glasses.
  • the positions where the eye tracking unit 50 and the control unit 60 are disposed on the glasses body 10 are not limited in the AR glasses of the present invention.
  • the eye tracking unit 50 and the control unit 60 may be respectively disposed at different positions of the glasses body 10 , or the eye tracking unit 50 and the control unit 60 may be disposed at the eyeglass body 10 after being integrated.
  • the integrated eye tracking unit 50 and the control unit 60 may be disposed at the same position of the glasses body 10 in the middle of the frame 11 of the glasses body 10 .
  • the eye tracking unit 50 obtains the focus distance
  • the deflection angle of the light steering element 41 is obtained as ⁇ and a command is sent to the driver 42 of the convergence adjustment unit 40 .
  • the driver 42 drives the light steering element 41 to rotate at an angle of ⁇ . It can be understood that the light steering element 41 on the left rotates counterclockwise, and the light steering element 42 on the right rotates clockwise. At this time, the angle between the coupled light and the normal is 2 ⁇ , and the binocular convergence
  • the distance is adjusted to X, which is consistent with the focusing distance X of the lens of the eyeball, where PD is the interpupillary distance.
  • the deflection angle ⁇ of the light steering element 41 at this time is 3.7°
  • the angle between the coupled light and the normal is 7.4°
  • the binocular convergence distance is 250mm at this time
  • the user’s observation experience is relatively comfortable.
  • the human interpupillary distance is in the range of 52mm-72mm. According to user habits, the more comfortable focusing distance is 180mm- ⁇ , then the ⁇ range is between 0-5.7°.
  • the optical engine 30 is disposed on the temples 12 of the glasses main body 10 , and the optical axis of the projection lens of the optical engine 30 and the optical waveguide 20
  • the coupling area 21 is vertical.
  • the AR glasses further include two light converting parts 70 , each of the light converting parts 70 is respectively disposed between each of the light machines 30 and each of the light turning elements 41 , wherein when the light machines 30 After the projected image light reaches the light turning part 70 , the light turning part 70 is used to turn the light and then radiate in the direction of the light turning element 41 .
  • the light converting part 70 is a reflective element, such as a mirror, which has a reflective surface.
  • the reflective surface of the light converting part 70 towards the stated The light engine 30 and the light turning element 41, when the image light projected by the light engine 30 reaches the reflective surface of the light turning part 70, the light turning part 70 causes the light turning part 70 to reach the light turning part 70 in a reflective manner.
  • the image light is turned, and the image light radiates toward the light turning element 41 after being turned, wherein after the image light turned by the light turning part 70 reaches the light turning element 41, the light
  • the turning element 40 further turns the image light so that it can subsequently be coupled into the optical waveguide 20 through the coupling region 21 of the optical waveguide 20 .
  • the angle between the reflective surface of the light conversion part 70 and the coupling area 21 of the optical waveguide 30 is 45°.
  • the light converting part 70 may be a refractive element, such as a refractive lens.
  • the light converting part 70 redirects the image light reaching the light converting part 70 in a refractive manner, and the image light radiates toward the light steering element 41 after being turned, wherein the image light after being turned by the light converting part 70 After the image light reaches the light turning element 41 , the light turning element 40 further turns the image light so that it can subsequently be coupled into the optical waveguide 20 through the coupling region 21 of the optical waveguide 20 .
  • FIG 6 shows an AR glasses according to another preferred embodiment of the present invention.
  • the AR glasses shown in Figure 6 include the glasses main body 10 and two optical waveguides 20 , one optical engine 30 and one convergence adjustment unit 40 provided on the glasses main body 10 , wherein
  • the convergence adjustment unit 40 includes a light steering element 41 and a transflective element 43.
  • the transflective element 43 is disposed between the optical engine 30 and an optical waveguide 20.
  • the transflective element 43 When After the image light projected by the optical engine 30 reaches the transflective element 43 , the transflective element 43 allows a part of the image light to be reflected to one of the optical waveguides 20 and pass through the optical waveguide 20 The coupling region 21 is coupled into the optical waveguide 20, and the semi-transflective element 43 allows another part of the image light to pass through and radiate toward the direction of the light turning element 41. When the image light passes through The transflective element 43 can be turned after reaching the light steering element 41 and coupled into the optical waveguide 20 through the coupling area 21 of the other optical waveguide 20 .
  • the light transmittance of the transflective element 43 is not limited in the AR glasses of the present invention.
  • the transflective element 43 allows 50% of the light to be reflected and 50% of the light to pass through.
  • the transflective element 43 allows 50% of the image light to be reflected to one of the optical waveguides 20 and passed through.
  • the coupling region 21 of the optical waveguide 20 couples into the optical waveguide 20 , and at the same time, the transflective element 43 allows another 50% of the image light to pass through and toward the
  • the light steering element 41 radiates directionally, and after reaching the light steering element 41 , it is deflected again by the light steering element 41 and coupled into the optical waveguide 20 through the coupling area 21 of the other optical waveguide 20 .
  • the type of the transflective element 43 is not limited in the AR glasses of the present invention.
  • the transflective element 43 can be a PBS prism.
  • the initial angles of the light turning element 41 and the transflective element 43 are both 45°, and the tilt angles of the light turning element 41 and the transflective element 43 are both adjustable, To adjust the binocular vergence of the AR glasses. That is to say, the convergence adjustment unit 40 includes two drivers 42 , wherein the light steering element 41 is connected to one driver 42 to allow the light steering element 41 to be driven to adjust the light steering. The tilt angle of the element 41, wherein the transflective element 43 is connected to another driver 42 to allow the transflective element 41 to be driven to adjust the tilt angle of the transflective element 43 .
  • the present invention further provides a binocular vergence adjustment method for AR glasses, wherein the binocular vergence adjustment method includes the following steps:
  • the binocular vergence adjustment method further includes the steps:
  • step (d) Determine the deflection angle provided on the light steering element 41 according to the focusing distance of the lens of the eyeball, wherein in step (b), the tilt angle of the light steering element 41 is adjusted according to the determined deflection angle.
  • the eye tracking unit 50 can obtain the focusing distance X of the lens of the eyeball, and in step (d), the control unit 60 According to the formula
  • the deflection angle of the light steering element 41 can be obtained as ⁇ , so that in step (b), the tilt angle of the light steering element 41 is adjusted according to the determined deflection angle ⁇ to adjust the binoculars of the AR glasses.
  • the vergence is adjusted to X, which is consistent with the focusing distance X of the lens of the eyeball, thereby solving the problem of vergence conflict.

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Abstract

本发明公开了一双目辐辏可调节的AR眼镜和双目辐辏调节方法，其中所述AR眼镜包括眼镜主体以及分别被设置于所述眼镜主体的光波导、光机和辐辏调节单元，其中所述辐辏调节单元包括光转向元件，所述光转向元件的角度被可调节地设置于所述光机和所述光波导之间，其中所述光转向元件用于使所述光机投射的图像光转向，经过转向作用的图像光能够经所述光波导的耦入区耦入和经所述光波导的耦出区耦出。

Description

双目辐辏可调节的AR眼镜和双目辐辏调节方法 技术领域
本发明涉及AR眼镜，特别涉及一双目辐辏可调节的AR眼镜和双目辐辏调节方法。
背景技术
现有的AR眼镜中光机投射出的图像光线于光波导的工作表面垂直耦入和垂直耦出，这种方式使得AR眼镜的辐辏距离为无穷远，并且现有的AR眼镜的光机和光波导的位置不可调节，导致AR眼镜的辐辏距离一般也是不可调节的。用户在佩戴AR眼镜时，晶状体的对焦距离为实际所视的显示物体到眼球的距离，而双目辐辏距离为AR眼镜所显示的虚拟物体在用户感知中到眼球的距离。如前所述，AR眼镜的辐辏距离为无穷远，由于用户实时聚焦的显示物体到眼球的距离不同，对焦距离也在进行实时变化，因此这两个距离的不一致会造成辐辏冲突的现象，以至于给佩戴AR眼镜的用户带来眩晕等不适体验。
发明内容
本发明的一个目的在于提供一双目辐辏可调节的AR眼镜和双目辐辏调节方法，其中所述AR眼镜的双目辐辏被可调节，以允许所述AR眼镜为用户带来良好的视觉体验。
本发明的一个目的在于提供一双目辐辏可调节的AR眼镜和双目辐辏调节方法，其中所述AR眼镜在光机和光波导之间设置光转向元件，通过调节所述光转向元件的角度的方式调节所述光机投射的图像光耦入所述光波导的方向，从而调节所述AR眼镜的双目辐辏。
本发明的一个目的在于提供一双目辐辏可调节的AR眼镜和双目辐辏调节方法，其中所述AR眼镜通过驱动器驱动所述光转向元件转动，以调节所述光转向元件的角度。例如，所述驱动器能够驱动所述光转向元件绕着特定的旋转轴转动，以调节所述光转向元件的角度，所述光转向元件的旋转轴所在的直线和所述光机的投影镜头的光轴所在的直线垂直，以精准地调节所述AR眼镜的双目辐辏。
本发明的一个目的在于提供一双目辐辏可调节的AR眼镜和双目辐辏调节方 法，其中所述AR眼镜在两个所述光转向元件之间设置所述驱动器，以由所述驱动器驱动两个所述光转向元件同步和同幅度地转动。优选地，所述驱动器是磁致伸缩驱动器，其位于两个所述光转向元件之间，以通过收缩或伸展的方式驱动两个所述光转向元件同步和同幅度地转动。
依本发明的一个方面，本发明提供一双目辐辏可调节的AR眼镜，其包括：
眼镜主体；
光波导，其中所述光波导被设置于所述眼镜主体；
光机，其中所述光机被设置于所述眼镜主体；以及
辐辏调节单元，其中所述辐辏调节单元包括光转向元件，所述光转向元件的角度被可调节地设置于所述光机和所述光波导之间，其中所述光转向元件用于使所述光机投射的图像光转向，经过转向作用的图像光能够经所述光波导的耦入区耦入和经所述光波导的耦出区耦出。
根据本发明的一个实施例，所述AR眼镜包括两个所述光波导和两个所述光机，所述光机和所述光波导被平行地设置，其中所述辐辏调节单元包括两个所述光转向元件，每个所述光转向元件分别被设置于每个所述光机和每个所述光波导之间。
根据本发明的一个实施例，所述AR眼镜包括一个所述光波导和两个所述光机，所述光机和所述光波导被平行地设置，其中所述辐辏调节单元包括两个所述光转向元件，每个所述光转向元件分别被设置于每个所述光机和所述光波导的每个耦入区之间。
根据本发明的一个实施例，所述AR眼镜包括两个所述光机，所述光机和所述光波导被垂直地设置，其中所述辐辏调节单元包括两个所述光转向元件，其中所述AR眼镜进一步包括两转光部，每个所述转光部分别被设置于每个所述光机和每个所述光转向元件之间，每个所述光转向元件分别被设置于每个所述转光部和每个所述光波导之间，其中所述光机投射的图像光在经所述转光部转向后能够向所述光转向元件方向辐射。
根据本发明的一个实施例，所述AR眼镜包括一个所述光机，所述光机和所述光波导被平行地设置，其中所述辐辏调节单元包括半反半透元件，所述半反半透元件的角度被可调节地被设置于所述光机和一个所述光波导之间，并且所述光机和所述光转向元件位于所述半反半透元件的相对两侧，其中所述半反半透元件 用于使所述光机投射的图像光转向并经一个所述光波导的耦入区耦入和使图像光穿过后朝向所述光转向元件方向辐射。
根据本发明的一个实施例，所述辐辏调节单元包括驱动器，所述光转向元件被可驱动地连接于所述驱动器，以由所述驱动器驱动所述光转向元件转动而调节所述光转向元件的倾斜角度。
根据本发明的一个实施例，所述驱动器是磁致伸缩驱动器，其包括一第一磁致伸缩部和一第二磁致伸缩部，所述第一磁致伸缩部的相对两端分别被连接于两个所述光转向元件的一个端部，所述第二磁致伸缩部的相对两端分别被连接于两个所述光转向元件的另一个端部。
根据本发明的一个实施例，所述辐辏调节单元包括两驱动器，所述半反半透元件被可驱动地连接于一个所述驱动器，所述光转向元件被可驱动地连接于另一个所述驱动器。
依本发明的另一个方面，本发明进一步提供AR眼镜的双目辐辏调节方法，其中所述双目辐辏调节方法包括如下步骤：
(a)允许光机投射的图像光在经光转向元件的转向作用后自光波导的耦入区耦入；和
(b)调节所述光转向元件的倾斜角度，以改变所述光机投射的图像光自所述光波导的耦入区耦入的角度和自耦出区耦出的角度，以调节所述AR眼镜的双目辐辏。
根据本发明的一个实施例，在所述步骤(a)和所述步骤(b)之间，所述双目辐辏调节方法进一步包括步骤：
(c)获取眼球的晶状体的对焦距离；和
(d)根据眼球的晶状体的对焦距离确定被设置于所述光转向元件的偏转角，其中在所述步骤(b)中，依据确定的偏转角调节所述光转向元件的倾斜角度。
根据本发明的一个实施例，所述AR眼镜在两个所述光波导和两个所述光机之间分别设置一个所述光转向元件，并且所述光波导和所述光机被平行地设置，其中在所述步骤(a)中，每个所述光机投射的图像光在经每个所述光转向元件的转向作用后分别自每个所述光波导的耦入区耦入，其中在所述步骤(b)中，分别调节每个所述光转向元件的倾斜角度，以改变每个所述光机投射的图像光自每个所述光波导的耦入区耦入的角度和自耦出区耦出的角度，并且自每个所述光 波导的耦出区耦出的图像光之间能够形成夹角。
根据本发明的一个实施例，所述AR眼镜在一个所述光波导的两个耦入区和两个所述光机之间分别设置一个所述光转向元件，并且所述光波导和所述光机被平行地设置，其中在所述步骤(a)中，每个所述光机投射的图像光在经每个所述光转向元件的转向作用后分别自所述光波导的每个耦入区耦入，其中在所述步骤(b)中，分别调节每个所述光转向元件的倾斜角度，以改变每个所述光机投射的图像光自所述光波导的每个耦入区耦入的角度和自耦出区耦出的角度，并且自所述光波导的每个耦出区耦出的图像光之间能够形成夹角。
根据本发明的一个实施例，所述AR眼镜在两个所述光波导和两个所述光机之间分别设置一个所述光转向元件和一个转向部，并且所述光波导和所述光机被垂直地设置，其中在所述步骤(a)中，每个所述光机投射的图像光在分别经每个所述转光部和每个所述光转向元件的转动作用后分别自每个所述光波导的耦入区耦入，其中在所述步骤(b)中，分别调节每个所述光转向元件的倾斜角度，以改变每个所述光机投射的图像光自每个所述光波导的耦入区耦入的角度。
根据本发明的一个实施例，所述AR眼镜在一个所述光波导和所述光机之间设置一个半反半透元件，在另一个所述光波导和所述半反半透元件之间设置一个所述光转向元件，其中在所述步骤(a)中，所述光机投射的图像光在经所述半反半透元件的转向作用后自一个所述光波导的耦入区耦入，所述光机投射的图像光在穿过所述半反半透元件并经所述光转向元件的转向作用后自另一个所述光波导的耦入区耦入，其中在所述步骤(b)中，分别调节所述半反半透元件和所述光转向元件的倾斜角度，以改变所述光机投射的图像光自每个所述光波导的耦入区耦入的角度。
根据本发明的一个实施例，在所述步骤(b)中，两个所述光转向元件的倾斜角度分别被调节。
根据本发明的一个实施例，在所述步骤(b)中，两个所述光转向元件的倾斜角度被同步调节。
根据本发明的一个实施例，在上述方法中，两个所述光转向元件的倾斜角度被同幅度且反向地调节。
根据本发明的一个实施例，在上述方法中，在两个所述光转向元件的一个端部之间设置第一磁致伸缩部，在两个所述光转向元件的另一个端部之间设置第二 磁致伸缩部，其中在所述第一磁致伸缩部收缩和第二磁致伸缩部伸展时，一个所述光转向元件逆时针转动和另一个所述光转向元件顺时针转动，在所述第一磁致伸缩部伸展和第二磁致伸缩部收缩时，一个所述光转向元件顺时针转动和另一个所述光转向元件逆时针转动。
附图说明
图1是依本发明的一较佳实施例的一AR眼镜的立体示意图。
图2是依本发明的上述较佳实施例的所述AR眼镜的佩戴状态示意图。
图3A至图3D分别是依本发明的上述较佳实施例的所述AR眼镜的双目辐辏调节过程示意图。
图4是依本发明的另一较佳实施例的一AR眼镜的立体示意图。
图5是依本发明的上述较佳实施例的所述AR眼镜的光机、光波导和辐辏调节单元的相对关系示意图。
图6是依本发明的另一较佳实施例的一AR眼镜的光机、光波导和辐辏调节单元的相对关系示意图。
具体实施方式
在详细说明本发明的任何实施方式之前，应理解的是，本发明在其应用中并不限于以下描述阐述或以下附图图示的部件的构造和布置细节。本发明能够具有其他实施方式并且能够以各种方式实践或进行。另外，应理解的是，这里使用的措辞和术语出于描述的目的并且不应该被认为是限制性的。本文中使用“包括”、“包括”或“具有”及其变型意在涵盖下文中陈列的条目及其等同物以及附加条目。除非另有指定或限制，否则术语“安装”、“连接”、“支撑”和“联接”及其变型被广泛地使用并且涵盖直接安装和间接的安装、连接、支撑和联接。此外，“连接”和“联接”不限于物理或机械的连接或联接。
并且，第一方面，在本发明的揭露中，术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系是基于附图所示的方位或位置关系，其仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此上述术语不能理解为对本发明 的限制；第二方面，术语“一”应理解为“至少一”或“一个或多个”，即在一个实施例中，一个元件的数量可以为一个，而在另外的实施例中，该元件的数量可以为多个，术语“一”不能理解为对数量的限制。
参考说明书附图之附图1至图3D，依本发明的一较佳实施例的一双目辐辏可调节的AR眼镜在接下来的描述中将被揭露和被阐述，其中所述AR眼镜包括一眼镜主体10、至少一光波导20、至少一光机30以及至少一辐辏调节单元40。
所述眼镜主体10被设置用于允许用户将所述AR眼镜佩戴于头部。具体地，参考附图1和图2，所述眼镜主体10包括一框架11和两镜腿12，两个所述镜腿12分别自所述框架11的相对两侧向下后延伸，其中在用户将所述AR眼镜佩戴于头部时，所述眼镜主体10的所述框架11的中部被搭靠在用户的鼻梁上方，所述眼镜主体10的两个所述镜腿12分别被搭靠在用户的两个耳部上方。
优选地，在本发明的一些实施例中，所述AR眼镜包括两个所述光波导20，其中每个所述光波导20分别具有一耦入区21和一耦出区22，所述光机30投射的图像光能够经所述光波导20的所述耦入区21耦入和经所述光波导20的所述耦出区22耦出。每个所述光波导20分别被设置于所述眼镜主体10的所述框架11的每侧，其中在用户将所述AR眼镜佩戴于头部时，所述眼镜主体10用于分别保持每个所述光波导20于用户的每个眼球前方，并且用户的每个眼球分别对应于每个所述光波导20的所述耦出区22，如此当所述光机30投射的图像光经所述光波导20的所述耦出区22耦出时，用户的眼球能够接收图像光，以获得视觉体验。可选地，在本发明的另一些实施例中，所述AR眼镜包括一个所述光波导20，其中所述光波导20具有两个所述耦入区21和两个所述耦出区22，在用户将所述AR眼镜佩戴于头部时，所述眼镜主体10用于保持所述光波导20于用户的双眼眼球的前方，并且用户的每个眼球分别对应于所述光波导20的每个所述耦出区22，如此当所述光机30投射的图像经所述光波导20的每个所述耦出区22耦出时，用户的眼球能够接收图像光，以获得视觉体验。
所述光机30被设置于所述眼镜主体10，并且所述光机30投射的图像光能够经所述光波导20的所述耦入区21耦入所述光波导20。具体地，在附图1至图3D示出的所述AR眼镜的这个具体示例中，所述AR眼镜包括两个所述光机30，每个所述光机30分别被设置于所述眼镜主体10的所述框架11的中部，并且每 个所述光机30和每个所述波导20对应，如此每个所述光机30投射的图像光在后续能够分别经每个所述光波导20的所述耦入区21耦入每个所述光波导20。
所述辐辏调节单元40包括至少一光转向元件41，所述光转向元件41被设置于所述光波导20和所述光机30之间，其中当所述光机30投射的图像光到达所述光转向元件41后，所述光转向元件41用于使图像光产生转向后经所述光波导20的所述耦入区21耦入所述光波导20和自所述光波导20的所述耦出区22耦出所述光波导20。
例如，在附图1至图3D示出的所述AR眼镜的这个具体示例中，所述光转向元件41是反射元件，例如，反射镜，其具有反射面，所述光转向元件41的反射面朝向所述光波导20的所述耦入区21和所述光机30，当所述光机30投射的图像光到达所述光转向元件41的反射面时，所述光转向元件41以反射方式使到达所述光转向元件41的图像光进行转向，并且图像光在被转向后能够经所述光波导20的所述耦入区21耦入所述光波导20和自所述光波导20的所述耦出区22耦出所述光波导20。
可选地，在所述AR眼镜的其他示例中，所述光转向元件41可以是折光元件，例如，折光透镜，当所述光机30投射的图像光到达所述光转向元件41时，所述光转向元件41以折射方式使到达所述光转向元件41的图像光进行转向，并且图像光在被转向后能够经所述光波导20的所述耦入区21耦入所述光波导20和自所述光波导20的所述耦出区22耦出所述光波导20。
优选地，继续参考附图1至图3D，所述光波导20和所述光机30被平行地设置，以使所述光机30的投影镜头的光轴和所述光波导20的所述耦入区21平行，其中所述光转向元件41被倾斜地设置，以允许所述光转向元件41的反射面朝向所述光波导20的所述耦入区21和所述光机30，通过这样的方式，当所述光机30投射的图像光到达所述光转向元件41的反射面时，所述光转向元件41的反射面反射所述光机30投射的图像光而使其转向，图像光在被转向后能够经所述光波导20的所述耦入区21耦入所述光波导20和自所述光波导20的所述耦出区22耦出所述光波导20。优选地，所述光转向元件41在初始状态的倾斜角度为45°，此时，所述光转向元件41使图像光的转向角度为90°。
优选地，继续参考附图1至图3D，所述辐辏调节单元40包括两个所述光转向元件41，其中每个所述光转向元件41分别被设置于每个所述光波导20和每 个所述光机30之间，如此一个所述光波导20、一个所述光机30和一个所述光转向元件41形成一个独立的成像系统。
换言之，所述AR眼镜包括一个所述眼镜主体10和被设置于所述眼镜主体10的两个所述成像系统，每个所述成像系统分别包括一个所述光波导20、一个所述光机30以及一个被设置于所述光波导20和所述光机30之间的所述光转向元件41，其中在用户佩戴所述AR眼镜于头部时，所述眼镜主体10保持每个所述成像系统的所述光波导20于用户的每个眼球前方。当两个所述光机30投射的图像光分别到达每个所述光转向元件41后，每个所述光转向元件41分别使每个所述光机30投射的图像光转向而经每个所述光波导20的所述耦入区21耦入每个所述光波导20，当光线自每个所述光波导20的所述耦出区22耦出每个所述光波导20时，所述AR眼镜能够于用户的双眼前提供虚拟图像。
所述光波导20和所述光机30被平行地设置，并且在初始状态下，所述光转向元件41的倾斜角度为45°，因此所述光机30投射的图像光在被所述光转向元件41的反射面反射后经所述光波导20的所述耦入区21垂直耦入光波导，此时，所述AR眼镜的双目辐辏距离为无穷远。为了缓解因辐辏冲突给佩戴所述AR眼镜的用户带来眩晕等不适体验的问题，本发明的所述AR眼镜的所述辐辏调节单元40的所述光转向元件41的倾斜角度被设置为可调节，以调节所述AR眼镜的双目辐辏，具体地，在调节两个所述光转向元件41的倾斜角度时，两个所述光机30投射的图像光自两个所述光波导20的所述耦入区21耦入的角度和自所述耦出区22耦出的角度能够被改变，以允许自两个所述光波导20的所述耦出区22耦出的图像光之间形成夹角，并且夹角的角度大于0度，如此调节所述AR眼镜的双目辐辏。优选地，通过驱动所述光转向元件41转动的方式能够调节所述光转向元件41的倾斜角度，进而调节所述AR眼镜的双目辐辏。
具体地，所述辐辏调节单元40包括至少一驱动器42，所述驱动器42被设置用于驱动所述光转向元件41转动，以调节所述光转向元件41的倾斜角度，从而允许自两个所述光波导20的所述耦出区22耦出的图像光之间形成夹角，以调节所述AR眼镜的双目辐辏。优选地，所述光转向元件41的旋转轴所在的直线和所述光机30的投影镜头的光轴所在的直线垂直且相交，以精准地调节所述AR眼镜的双目辐辏。
更具体地，继续参考附图1至图3D，所述驱动器42是磁致伸缩驱动器，其包括一第一磁致伸缩部421和一第二磁致伸缩部422，其中所述第一磁致伸缩部421的相对两端分别被连接于两个所述光转向元件41的上端，所述第二磁致伸缩部422的相对两端分别被连接于两个所述光转向元件41的下端。在向所述第一磁致伸缩部421供电而使所述第一磁致伸缩部421收缩和向所述第二磁致伸缩部422供电而使所述第二磁致伸缩部422伸展时，位于左侧的所述光转向元件41被驱动进行逆时针旋转，以改变左侧的所述光机30投射的图像光自左侧的所述光波导20的所述耦入区21耦入左侧的所述光波导20的方向，位于右侧的所述光转向元件41被驱动进行顺时针旋转，以改变右侧的所述光机30投射的图像光自右侧的所述光波导20的所述耦入区21耦入右侧的所述光波导20的方向，如此调节所述AR眼镜的双目辐辏。相应地，在向所述第一磁致伸缩部421供电而使所述第一磁致伸缩部421伸展和向所述第二磁致伸缩部422供电而使所述第二磁致伸缩部422收缩时，位于左侧的所述光转向元件41被驱动进行顺时针旋转，以改变左侧的所述光机30投射的图像光自左侧的所述光波导20的所述耦入区21耦入左侧的所述光波导20的方向，位于右侧的所述光转向元件41被驱动进行逆时针旋转，以改变右侧的所述光机30投射的图像光自右侧的所述光波导20的所述耦入区21耦入右侧的所述光波导20的方向，如此调节所述AR眼镜的双目辐辏。
优选地，所述驱动器42的所述第一磁致伸缩部421的相对两端和所述第二磁致伸缩部422的相对两端均是同步且同幅度地收缩或伸展，以允许两个所述光转向元件41的转动同步且转动角度一致。
值得一提的是，在本发明的所述AR眼镜的其他示例中，所述辐辏调节单元40的所述驱动器42可以是但不限于直流电机、压电陶瓷驱动结构以及SMA驱动结构。
继续参考附图1至图3D，所述AR眼镜进一步包括一眼球追踪单元50和一控制单元60，所述眼球追踪单元50和所述控制单元60分别被设置于所述眼镜主体10，并且所述眼球追踪单元50和所述辐辏调节单元40的所述驱动器42分别被连接于所述控制单元60。所述眼球追踪模块40被设置用于追踪用户视线，确定聚焦位置到眼球的距离等信息，并将相关信息反馈至所述控制单元60，所述控制单元60被设置用于计算得到调节量并传输至所述辐辏调节单元40的所述 驱动器42，所述驱动器42依据指令进行调节所述光转向元件41的角度，如此改变所述光机30投射的图像光自所述光波导20的所述耦入区21耦入所述光波导20的方向，以调节所述AR眼镜的双目辐辏。
值得一提的是，所述眼球追踪单元50和所述控制单元60被设置于所述眼镜主体10的位置在本发明的所述AR眼镜中不受限制。例如，所述眼球追踪单元50和所述控制单元60可以分别被设置于所述眼镜主体10的不同位置，或者所述眼球追踪单元50和所述控制单元60在被集成后被设置于所述眼镜主体10的同一个位置，例如，集成后的所述眼球追踪单元50和所述控制单元60可以被设置于所述眼镜主体10的所述框架11的中部。
参考附图3A至图3D，当用户注视位置发生改变时，所述眼球追踪单元50获取眼球的晶状体的对焦距离X，所述控制单元60根据公式得到所述光转向元件41的偏转角为Δθ并发送指令给所述辐辏调节单元40的所述驱动器42，所述驱动器42带动所述光转向元件41旋转Δθ角度。可以理解的是，左侧的所述光转向元件41为逆时针旋转，右侧的所述光转向元件42为顺时针旋转，此时耦入光线与法线的夹角为2Δθ，双目辐辏距离调节为X，与眼球的晶状体的对焦距离X一致，其中PD为瞳距。例如，假设用户的瞳距为65mm，眼球的晶状体的对焦位置与眼球的距离为250mm，则此时所述光转向元件41的偏转角Δθ角度为3.7°，耦出光线与法线夹角为7.4°，此时双目辐辏距离为250mm，用户观察体验相对舒适。通常人的瞳距为52mm-72mm范围内，根据用户习惯，较为舒适的对焦距离在180mm-∞，那么的Δθ范围在0-5.7°之间。
附图4和图5示出了依本发明的另一较佳实施例的一AR眼镜，与附图1至图3D示出的所述AR眼镜不同的是，在附图4和图5示出的所述AR眼镜的这个具体示例中，所述光机30被设置于所述眼镜主体10的所述镜腿12，并且所述光机30的投影镜头的光轴和所述光波导20的所述耦入区21垂直。
所述AR眼镜进一步包括两转光部70，每个所述转光部70分别被设置于每个所述光机30和每个所述光转向元件41之间，其中当所述光机30投射的图像光到达所述转光部70后，所述转光部70用于使光线产生转向后向所述光转向元件41方向辐射。
例如，在附图4和图5示出的所述AR眼镜的这个具体示例中，所述转光部70是反射元件，例如反射镜，其具有反射面，所述转光部70的反射面朝向所述 光机30和所述光转向元件41，当所述光机30投射的图像光到达所述转光部70的反射面时，所述转光部70以反射方式使到达所述转光部70的图像光进行转向，并且图像光在被转向后朝向所述光转向元件41方向辐射，其中在在被所述转光部70转向后的图像光到达所述光转向元件41后，所述光转向元件40进一步使图像光转向，以在后续能够经所述光波导20的所述耦入区21耦入所述光波导20。优选地，所述转光部70的反射面和所述光波导30的所述耦入区21的夹角为45°。
可选地，在所述AR眼镜的其他示例中，所述转光部70可以是折光元件，例如折光透镜，当所述光机30投射的图像光到达所述转光部70时，所述转光部70以折射方式使到达所述转光部70的图像光进行转向，并且图像光在被转向后朝向所述光转向元件41方向辐射，其中在被所述转光部70转向后的图像光到达所述光转向元件41后，所述光转向元件40进一步使图像光转向，以在后续能够经所述光波导20的所述耦入区21耦入所述光波导20。
附图6示出了依本发明的另一较佳实施例的一AR眼镜，与附图1至图3D示出的所述AR眼镜不同的是，在附图6示出的所述AR眼镜的这个具体示例中，所述AR眼镜包括所述眼镜主体10以及被设置于所述眼镜主体10的两个所述光波导20、一个所述光机30和一个所述辐辏调节单元40，其中所述辐辏调节单元40包括一个所述光转向元件41和一个半反半透元件43，所述半反半透元件43被设置于所述光机30和一个所述光波导20之间，当所述光机30投射的图像光到达所述半反半透元件43后，所述半反半透元件43允许图像光中的一部分被反射至一个所述光波导20并经所述光波导20的所述耦入区21耦入所述光波导20，所述半反半透元件43允许图像光中的另一部分穿过并朝向所述光转向元件41的方向辐射，在图像光穿过所述半反半透元件43并到达所述光转向元件41后能够被转向，并经另一个所述光波导20的所述耦入区21耦入所述光波导20。
值得一提的是，所述半反半透元件43的透光率在本发明的所述AR眼镜中不受限，例如，在附图6示出的所述AR眼镜的这个具体示例中，所述半反半透元件43允许50％的光线被反射和允许50％的光线穿过。换言之，打当所述光机30投射的图像光到达所述半反半透元件43后，所述半反半透元件43允许图像光中的50％被反射至一个所述光波导20并经所述光波导20的所述耦入区21耦入所述光波导20，同时，所述半反半透元件43允许图像光中的另外50％穿过并朝向 所述光转向元件41方向辐射，在到达所述光转向元件41后再次被所述光转向元件41转向并经另一个所述光波导20的所述耦入区21耦入所述光波导20。
值得一提的是，所述半反半透元件43的类型在本发明的所述AR眼镜中不受限制，例如所述半反半透元件43可以是PBS棱镜。
优选地，所述光转向元件41和所述半反半透元件43的初始角度均为45°，并且所述光转向元件41和所述半反半透元件43的倾斜角度均被可调节，以调节所述AR眼镜的双目辐辏。也就是说，所述辐辏调节单元40包括两个所述驱动器42，其中所述光转向元件41被连接于一个所述驱动器42，以允许所述光转向元件41被驱动而调节所述光转向元件41的倾斜角度，其中所述半反半透元件43被连接于另一个所述驱动器42，以允许所述半反半透元件41被驱动而调节所述半反半透元件43的倾斜角度。
依本发明的另一个方面，本发明进一步提供AR眼镜的双目辐辏调节方法，其中所述双目辐辏调节方法包括如下步骤：
(a)允许所述光机30投射的图像光在经所述光转向元件41的转向作用后自所述光波导20的所述耦入区21耦入；和
(b)调节所述光转向元件41的倾斜角度，以改变所述光机30投射的图像光自所述光波导20的所述耦入区21耦入的方向，以调节所述AR眼镜的双目辐辏，从而允许所述AR眼镜为用户带来良好的视觉体验。
优选地，在所述步骤(a)和所述步骤(b)之间，所述双目辐辏调节方法进一步包括步骤：
(c)获取眼球的晶状体的对焦距离；和
(d)根据眼球的晶状体的对焦距离确定被设置于所述光转向元件41的偏转角，其中在所述步骤(b)中，依据确定的偏转角调节所述光转向元件41的倾斜角度。
例如，在用户佩戴所述AR眼镜时，在所述步骤(c)中，所述眼球追踪单元50能够获取眼球的晶状体的对焦距离X，在所述步骤(d)中，所述控制单元60根据公式能够得到所述光转向元件41的偏转角为Δθ，以在所述步骤(b)中，依据确定的偏转角Δθ调节所述光转向元件41的倾斜角度，以将所述AR眼镜的双目辐辏调节为X，与眼球的晶状体的对焦距离X一致，从而解决辐辏冲突的问题。
本领域的技术人员应理解，上述描述及附图中所示的本发明的实施例只作为举例而并不限制本发明。本发明的目的已经完整并有效地实现。本发明的功能及结构原理已在实施例中展示和说明，在没有背离所述原理下，本发明的实施方式可以有任何变形或修改。

Claims (18)

  1. 双目辐辏可调节的AR眼镜，其特征在于，包括：
    眼镜主体；
    光波导，其中所述光波导被设置于所述眼镜主体；
    光机，其中所述光机被设置于所述眼镜主体；以及
    辐辏调节单元，其中所述辐辏调节单元包括光转向元件，所述光转向元件的角度被可调节地设置于所述光机和所述光波导之间，其中所述光转向元件用于使所述光机投射的图像光转向，经过转向作用的图像光能够经所述光波导的耦入区耦入和经所述光波导的耦出区耦出。
  2. 根据权利要求1所述的AR眼镜，其中所述AR眼镜包括两个所述光波导和两个所述光机，所述光机和所述光波导被平行地设置，其中所述辐辏调节单元包括两个所述光转向元件，每个所述光转向元件分别被设置于每个所述光机和每个所述光波导之间。
  3. 根据权利要求1所述的AR眼镜，其中所述AR眼镜包括一个所述光波导和两个所述光机，所述光机和所述光波导被平行地设置，其中所述辐辏调节单元包括两个所述光转向元件，每个所述光转向元件分别被设置于每个所述光机和所述光波导的每个耦入区之间。
  4. 根据权利要求1所述的AR眼镜，其中所述AR眼镜包括两个所述光机，所述光机和所述光波导被垂直地设置，其中所述辐辏调节单元包括两个所述光转向元件，其中所述AR眼镜进一步包括两转光部，每个所述转光部分别被设置于每个所述光机和每个所述光转向元件之间，每个所述光转向元件分别被设置于每个所述转光部和每个所述光波导之间，其中所述光机投射的图像光在经所述转光部转向后能够向所述光转向元件方向辐射。
  5. 根据权利要求1所述的AR眼镜，其中所述AR眼镜包括一个所述光机，所述光机和所述光波导被平行地设置，其中所述辐辏调节单元包括半反半透元件，所述半反半透元件的角度被可调节地被设置于所述光机和一个所述光波导之间，并且所述光机和所述光转向元件位于所述半反半透元件的相对两侧，其中所述半反半透元件用于使所述光机投射的图像光转向并经一个所述光波导的耦入区耦入和使图像光穿过后朝向所述光转向元件方向辐射。
  6. 根据权利要求2所述的AR眼镜，其中所述辐辏调节单元包括驱动器，所述光转向元件被可驱动地连接于所述驱动器，以由所述驱动器驱动所述光转向元件转动而调节所述光转向元件的倾斜角度。
  7. 根据权利要求6所述的AR眼镜，其中所述驱动器是磁致伸缩驱动器，其包括一第一磁致伸缩部和一第二磁致伸缩部，所述第一磁致伸缩部的相对两端分别被连接于两个所述光转向元件的一个端部，所述第二磁致伸缩部的相对两端分别被连接于两个所述光转向元件的另一个端部。
  8. 根据权利要求5所述的AR眼镜，其中所述辐辏调节单元包括两驱动器，所述半反半透元件被可驱动地连接于一个所述驱动器，所述光转向元件被可驱动地连接于另一个所述驱动器。
  9. AR眼镜的双目辐辏调节方法，其特征在于，所述双目辐辏调节方法包括如下步骤：
    (a)允许光机投射的图像光在经光转向元件的转向作用后自光波导的耦入区耦入；和
    (b)调节所述光转向元件的倾斜角度，以改变所述光机投射的图像光自所述光波导的耦入区耦入的角度和自耦出区耦出的角度，以调节所述AR眼镜的双目辐辏。
  10. 根据权利要求9所述的双目辐辏调节方法，其中在所述步骤(a)和所述步骤(b)之间，所述双目辐辏调节方法进一步包括步骤：
    (c)获取眼球的晶状体的对焦距离；和
    (d)根据眼球的晶状体的对焦距离确定被设置于所述光转向元件的偏转角，其中在所述步骤(b)中，依据确定的偏转角调节所述光转向元件的倾斜角度。
  11. 根据权利要求10所述的双目辐辏调节方法，其中所述AR眼镜在两个所述光波导和两个所述光机之间分别设置一个所述光转向元件，并且所述光波导和所述光机被平行地设置，其中在所述步骤(a)中，每个所述光机投射的图像光在经每个所述光转向元件的转向作用后分别自每个所述光波导的耦入区耦入，其中在所述步骤(b)中，分别调节每个所述光转向元件的倾斜角度，以改变每个所述光机投射的图像光自每个所述光波导的耦入区耦入的角度和自耦出区耦出的角度，并且自每个所述光波导的耦出区耦出的图像光之间能够形成夹角。
  12. 根据权利要求10所述的双目辐辏调节方法，其中所述AR眼镜在一个所述光波导的两个耦入区和两个所述光机之间分别设置一个所述光转向元件，并且所述光波导和所述光机被平行地设置，其中在所述步骤(a)中，每个所述光机投射的图像光在经每个所述光转向元件的转向作用后分别自所述光波导的每个耦入区耦入，其中在所述步骤(b)中，分别调节每个所述光转向元件的倾斜角度，以改变每个所述光机投射的图像光自所述光波导的每个耦入区耦入的角度和自耦出区耦出的角度，并且自所述光波导的每个耦出区耦出 的图像光之间能够形成夹角。
  13. 根据权利要求10所述的双目辐辏调节方法，其中所述AR眼镜在两个所述光波导和两个所述光机之间分别设置一个所述光转向元件和一个转向部，并且所述光波导和所述光机被垂直地设置，其中在所述步骤
    (a)中，每个所述光机投射的图像光在分别经每个所述转光部和每个所述光转向元件的转动作用后分别自每个所述光波导的耦入区耦入，其中在所述步骤(b)中，分别调节每个所述光转向元件的倾斜角度，以改变每个所述光机投射的图像光自每个所述光波导的耦入区耦入的角度。
  14. 根据权利要求10所述的双目辐辏调节方法，其中所述AR眼镜在一个所述光波导和所述光机之间设置一个半反半透元件，在另一个所述光波导和所述半反半透元件之间设置一个所述光转向元件，其中在所述步骤(a)中，所述光机投射的图像光在经所述半反半透元件的转向作用后自一个所述光波导的耦入区耦入，所述光机投射的图像光在穿过所述半反半透元件并经所述光转向元件的转向作用后自另一个所述光波导的耦入区耦入，其中在所述步骤(b)中，分别调节所述半反半透元件和所述光转向元件的倾斜角度，以改变所述光机投射的图像光自每个所述光波导的耦入区耦入的角度。
  15. 根据权利要求11所述的双目辐辏调节方法，其中在所述步骤(b)中，两个所述光转向元件的倾斜角度分别被调节。
  16. 根据权利要求11所述的双目辐辏调节方法，其中在所述步骤(b)中，两个所述光转向元件的倾斜角度被同步调节。
  17. 根据权利要求16所述的双目辐辏调节方法，其中在上述方法中，两个所述光转向元件的倾斜角度被同幅度且反向地调节。
  18. 根据权利要求17所述的双目辐辏调节方法，其中在上述方法中，在两个所述光转向元件的一个端部之间设置第一磁致伸缩部，在两个所述光转向元件的另一个端部之间设置第二磁致伸缩部，其中在所述第一磁致伸缩部收缩和第二磁致伸缩部伸展时，一个所述光转向元件逆时针转动和另一个所述光转向元件顺时针转动，在所述第一磁致伸缩部伸展和第二磁致伸缩部收缩时，一个所述光转向元件顺时针转动和另一个所述光转向元件逆时针转动。
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