WO2021179786A1 - Ar光学系统和ar显示设备 - Google Patents

Ar光学系统和ar显示设备 Download PDF

Info

Publication number
WO2021179786A1
WO2021179786A1 PCT/CN2021/071039 CN2021071039W WO2021179786A1 WO 2021179786 A1 WO2021179786 A1 WO 2021179786A1 CN 2021071039 W CN2021071039 W CN 2021071039W WO 2021179786 A1 WO2021179786 A1 WO 2021179786A1
Authority
WO
WIPO (PCT)
Prior art keywords
half mirror
light
mirror unit
condensing lens
optical system
Prior art date
Application number
PCT/CN2021/071039
Other languages
English (en)
French (fr)
Inventor
栗可
武玉龙
董瑞君
刘亚丽
王晨如
张�浩
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/424,506 priority Critical patent/US20220317448A1/en
Publication of WO2021179786A1 publication Critical patent/WO2021179786A1/zh

Links

Images

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
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies
    • G02B27/026—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies and a display device, e.g. CRT, LCD, for adding markings or signs or to enhance the contrast of the viewed object
    • 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0905—Dividing and/or superposing multiple light beams
    • 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
    • G02B27/40—Optical focusing aids
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0075—Arrays characterized by non-optical structures, e.g. having integrated holding or alignment means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T19/00—Manipulating 3D models or images for computer graphics
    • G06T19/006—Mixed reality
    • 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
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0127—Head-up displays characterised by optical features comprising devices increasing the depth of field
    • 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
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/013—Head-up displays characterised by optical features comprising a combiner of particular shape, e.g. curvature
    • 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
    • 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
    • G02B27/0179—Display position adjusting means not related to the information to be displayed
    • G02B2027/0185—Displaying image at variable distance

Definitions

  • the present disclosure relates to, but is not limited to, the field of augmented reality technology. Specifically, the present disclosure relates to an AR optical system and an AR display device.
  • AR Augmented Reality
  • AR Augmented Reality
  • Its principle is to apply virtual information to the real world through computer technology.
  • the real environment and virtual objects are superimposed on the same screen or space in real time.
  • people can interact with the real world through wearable devices, such as AR glasses or AR helmets.
  • the display screen creates a stereoscopic feeling through binocular parallax, but because the distance between the display screen corresponding to the two eyes and the human eye is the same, when viewing stereo images of different depths, the focus depth of the single eye It is always a plane, which does not match the rotation angle of the eyes, which can cause dizziness after long-term use. In severe cases, it can cause strabismus and amblyopia in both eyes.
  • an embodiment of the present disclosure provides an AR optical system, including:
  • the depth-of-field separation structure is used to convert the light emitted by the image source into multiple light beams with different depths of field;
  • a condensing lens located on the exit light path of the depth-of-field separation structure, for receiving and shaping the multiple light beams with different depths of field;
  • the first half mirror is located on the side of the condensing lens away from the depth-of-field separation structure, and is used to reflect the shaped multiple light beams with different depths of field to a set direction;
  • a concave mirror with a preset transmittance and reflection ratio is located on one side of the first half mirror in the direction of light reflection, and the concave surface of the concave mirror faces the first half mirror, and is used to combine a plurality of The light beams with different depths of field are reflected and converged, and then enter the set observation position through the first half mirror.
  • the depth-of-field separation structure is a transflective lens assembly
  • the transflective mirror assembly includes: a plurality of semi-transparent and semi-reflective mirror units with a preset transmittance; a plurality of the semi-transparent and semi-transparent The mirror units are arranged at intervals to correspond to the image sources with different object distances;
  • the output light path of the half mirror unit faces the light incident surface of the condensing lens; A part of the output light path of the half mirror unit is transmitted and/or reflected by the other half mirror unit toward the light incident surface of the condensing lens; a plurality of the half mirror unit
  • the mirror unit is used to respectively reflect and/or transmit the light emitted by the respective corresponding image sources to form a plurality of light beams with different depths of field and project them toward the condensing lens.
  • the half mirror unit closest to the condensing lens is the first half mirror unit, and the half mirror unit farthest from the condensing lens Is the second half mirror unit; the half mirror units located between the first half mirror unit and the second half mirror unit are all third half mirror units Mirror unit
  • the second half mirror unit is used to reflect the second light of the corresponding second image source, so that after the second light passes through each of the third half mirror units, the second light is absorbed by the first half mirror unit.
  • the half mirror unit reflects to the light incident surface of the condensing lens;
  • the N-th third half mirror unit is also used to reflect the third light of the corresponding third image source, so that the third light is reflected by the first half mirror unit to the convergence The light incident surface of the lens; or, after the third light passes through the N-1th to the first third half mirror unit, it is reflected by the first half mirror unit to the The light incident surface of the condensing lens; N is a positive integer; the third half mirror unit closest to the first half mirror unit is the first third half mirror unit ;
  • the first half mirror unit is also used to transmit the first light of the corresponding first image source to the light incident surface of the condensing lens.
  • the half mirror unit close to the condensing lens is a first half mirror unit, and the half mirror unit far away from the condensing lens is a second half mirror unit.
  • the second half mirror unit is used to reflect the second light of the corresponding second image source, so that the second light is reflected by the first half mirror unit to the incident light of the condensing lens
  • the first half mirror unit is also used to transmit the first light of the corresponding first image source to the light incident surface of the condensing lens.
  • the plurality of half mirror units are at least one of a flat mirror, a concave mirror, or a convex mirror;
  • the first half mirror is one of a flat mirror, a concave mirror or a convex mirror.
  • the number of the half mirror unit is three.
  • the depth-of-field separation structure is a microlens array, and the microlens array is arranged in parallel with the converging lens;
  • the micro lens array is used for receiving the light emitted by the image source and forming a plurality of light beams with different depths of field to emit.
  • the condensing lens includes at least an aspheric lens
  • the surface of the condensing lens is coated with an anti-reflection coating.
  • the main optical axis of the concave mirror and the main optical axis of the condensing lens intersect with the first half mirror.
  • embodiments of the present disclosure also provide an AR display device, including: an image source and the AR optical system described in the first aspect, and the depth-of-field separation structure in the AR optical system corresponds to the image source set up.
  • the AR display device further includes an optical system frame; the AR optical system is fixed on the optical system frame; or, the AR optical system and the image source are both fixed on the optical system frame.
  • the AR display device further includes an optical system frame; the AR optical system is fixed on the optical system frame; or, the AR optical system and the image source are both fixed on the optical system frame.
  • the system framework On the system framework.
  • FIG. 1 is a schematic structural diagram of an AR optical system and a corresponding image source provided by an embodiment of the disclosure
  • FIG. 2 is a schematic structural diagram of another AR optical system and corresponding image source provided by an embodiment of the disclosure
  • FIG. 3 is a schematic diagram of another structure of an AR optical system and a corresponding image source provided by an embodiment of the disclosure, and an image depth corresponding to the structure.
  • an embodiment of the present disclosure provides an AR optical system, including: a depth-of-field separation structure 10, a converging lens 5, a first half mirror 7 and a concave mirror 6 with a preset transmission/reflection ratio.
  • the depth-of-field separation structure 10 is arranged corresponding to the image source, and the depth-of-field separation structure 10 is used to convert the light emitted by the image source into multiple light beams with different depths of field.
  • the condensing lens 5 is located on the exit light path of the depth-of-field separation structure 10, and is used for receiving and shaping multiple light beams with different depths of field.
  • the first half mirror 7 is located on the side of the condensing lens 5 away from the depth-of-field separation structure 10, and is used to reflect a plurality of shaped light beams with different depths of field to a set direction.
  • the concave mirror 6 is located on the side of the first half mirror 7 in the direction in which the light is reflected.
  • the concave surface of the concave mirror 6 faces the first half mirror 7, and is used to reflect and converge multiple light beams with different depths of field. It passes through the first half mirror 7 and enters the set observation position.
  • the AR optical system provided in this embodiment uses the depth-of-field separation structure 10 to convert the light emitted by the image source into multiple light beams with different depths of field. Because the light beams with different depths of field correspond to different object distances, the image distances of different images are different, thus forming The focal planes of different distances enable users to see images of different depths, so as to reduce the convergence and conflict of the user during use, and improve the user experience.
  • the image source may be set to be multiple or single according to actual needs.
  • the image sources in this embodiment include at least one of the first image source 1, the second image source 8 or the first image source 1 in the figure, which can be referred to in the following embodiments.
  • light beams with different depths of field mean that the light path distances of the light beams in the entire optical system are different, and each light beam refers to the collection of all rays of the same depth of field. describe.
  • a light beam representing the same depth of field can represent the collection of all the light rays emitted by the image source, of course, it can also It is a collection of part of the emitted light, and each light beam can produce the corresponding depth image effect.
  • the number of light beams can be determined according to the specific implementation structure of the depth-of-field separation structure 10, and there is no specific limitation here.
  • the condensing lens 5 is arranged on the exit light path of the depth-of-field separation structure 10. Since the condensing lens 5 is a lens with a thicker center and a thinner edge, it has the function of condensing light, thereby separating the depth-of-field structure. 10 The multiple beams with different depths of field are converged and shaped to improve the light output effect.
  • the concave mirror 6 receives more light.
  • the number of light beams with different depths of field is consistent with the number of multiple light beams with different depths of field shaped by the condenser lens 5.
  • the concave mirror 6 with a preset transmittance ratio can be a concave mirror 6 with total reflection (that is, the transmittance is zero).
  • the concave mirror 6 converges the light beams reflected by the first half mirror 7 and the concave
  • the concave surface of the mirror 6 faces the first half-mirror 7, and reflects the light in the multiple beams with different depths of field to the front focal point of the concave mirror 6, and the light from the multiple beams with different depths of field converge at this focal point. Then through the first half mirror 7 shot into the set observation position.
  • the concave mirror 6 may also be a lens with both transmission and reflection effects to ensure that part of the ambient light enters the AR optical system and enters the set observation position, so as to improve the fusion effect with the real scene.
  • the overall thickness of the concave mirror 6 needs to be uniformly set to ensure the imaging effect.
  • the set observation position generally refers to the position of the human eye.
  • the image source in this embodiment may be a liquid crystal on silicon (LCOS, Liquid Crystal on Silicon) display panel, an organic light emitting semiconductor (OLED, Organic Light Emitting Diode) display panel, or a liquid crystal display panel (LCD, Liquid). Crystal Display).
  • LCOS liquid crystal on silicon
  • OLED Organic Light Emitting Diode
  • LCD liquid crystal display panel
  • the ratio of transmission and reflection can have various combinations, and it is not limited to half as Transmittance and half reflectance (that is, the transmittance ratio is 50% to 50%), it can also include: the transmittance ratio is 30% to 70% or 60% to 90%, etc.
  • the specific transmittance ratio is based on the optical The actual requirements of the system are set, and there is no specific limitation here.
  • multiple refers to two or more than two
  • multiple refers to two or more, and so on.
  • the inventor of the present disclosure considers that for multiple image sources, it is necessary to set up corresponding transflective mirrors, and use the combination of transflective mirrors to realize different image sources and converging lenses 5
  • the distance of the light path is different, so that light beams with different depths of field corresponding to different image sources are formed.
  • the embodiment of the present disclosure provides the following exemplary implementation for the depth-of-field separation structure 10:
  • the depth-of-field separation structure 10 is a transflective lens assembly, and the transflective mirror assembly includes: a plurality of semi-transparent and half-mirror units with preset transmittance ratio; Image source.
  • the output light path of the half mirror unit faces the light incident surface of the condensing lens 5; towards the part of the half mirror other than the light incident surface of the condensing lens 5
  • the exit light path of the unit directly faces the light incident surface of the converging lens 5 after being transmitted and/or reflected by other half mirror units.
  • the multiple half mirror units are used to respectively emit the light emitted by the respective corresponding image sources through reflection or transmission, or a combination of reflection and transmission, so as to form multiple light beams with different depths of field and irradiate them to the condensing lens 5.
  • the exit light paths of all the half mirror units may face the light incident surface of the condensing lens 5, for example: a plurality of half mirror units. After the mirror units are all reflected, the corresponding reflected light path is directed toward the light incident surface of the condensing lens 5.
  • the half mirror units in different positions may need to pass through other half mirror units before they can be directly directed toward the convergence. The light incident surface of the lens 5, but the directions of the reflection and exit light paths of the half mirror units are the same.
  • the light incident surface directly facing the condensing lens 5 in this embodiment only indicates the light exit direction, and does not mean that the exit light path of the half mirror unit is directly directed to the light incident surface of the condensing lens 5, and other translucent lenses may pass through in the middle.
  • the transmission or reflection of the mirror unit can be directly directed to the light incident surface of the condenser lens.
  • the semi-transmissive mirror unit's exit light path faces outside the light incident surface of the condenser lens 5.
  • This part of the semi-transparent half mirror unit refers to the incident light toward the condenser lens 5
  • the outgoing light path of the half mirror unit can be directed to the light entrance surface of the condensing lens 5 after the transmission or reflection of other half mirror units among the multiple half mirror units, or through The combination of transmission and reflection then faces the light incident surface of the condensing lens 5.
  • the light emitted by the corresponding image source is emitted by a combination of reflection or transmission, or reflection and transmission (the number of reflections and transmissions can be specifically set according to the actual structure requirements) by multiple half mirror units, because the image
  • the object distances of the sources are different, and multiple light beams with different depths of field can be formed when they reach the light incident surface of the condensing lens 5.
  • the image sources with different object distances in this embodiment mean that the light emitted from the light-emitting surface of the image source has different propagation distances from the light-incident surface of the condensing lens 5 or the observation position of the human eye, so as to form multiple different depths of field through reflection or transmission. Beam.
  • the light path toward the light incident surface of the condensing lens 5 in the present embodiment means that it can be incident from the condensing lens 5 and converged and shaped to be incident on the first half mirror 7.
  • the half mirror unit closest to the condenser lens 5 is the first half mirror unit 3, and the half mirror unit farthest from the condenser lens 5 is the second half mirror unit 9;
  • the half mirror unit between the half mirror unit 3 and the second half mirror unit 9 is the third half mirror unit 4.
  • the second half mirror unit 9 is used to reflect the second light of the corresponding second image source 8, so that after the second light passes through each of the third half mirror units 4, it is transmitted by the first half.
  • the mirror unit 3 reflects to the light incident surface of the condensing lens 5.
  • the number of the third half mirror unit 4 is N, and N is a positive integer.
  • the N-th third half mirror unit 4 is also used to reflect the third light of the corresponding third image source 2, so that the third light is reflected by the first half mirror unit 3 to the incident light of the condensing lens 5. Or, after the third light passes through the N-1th to the first third half mirror unit 4, it is reflected by the first half mirror unit 3 to the light incident surface of the condensing lens 5.
  • the third half mirror unit 4 closest to the first half mirror unit 3 is the first third half mirror unit 4.
  • the first half mirror unit 3 is also used to transmit the first light from the corresponding first image source 1 to the light incident surface of the condensing lens 5.
  • the number N of the third half mirror unit 4 can be one or more. It can be set according to actual needs.
  • Each third half mirror unit 4 corresponds to one third half mirror unit. Image source 2.
  • a third half mirror unit 4 is taken as an example for description.
  • the reflected light direction and the transmitted light direction of the first half mirror unit 3 are parallel, and both face the light incident surface of the condensing lens 5.
  • the first half mirror unit 3 transmits and emits the light emitted by the first image source 1 Or, after reflection, a beam with the same depth of field is formed and directed toward the condensing lens 5.
  • the first half mirror unit 3 uses transmission and emission of the first light emitted by the first image source 1 as an example for description.
  • the second half mirror unit 9 transmits or reflects the second light emitted by the second image source 8 and then emits.
  • the reflection of the second half mirror unit 9 is taken as an example for description.
  • the light beam reflected by the second half mirror unit 9 is directed to the third half mirror unit 4 as the incident light path (which may be transmission or reflection) of the third half mirror unit 4.
  • the light beam reflected by the second half mirror unit 9 is used as the transmitted incident light path of the third half mirror unit 4 as an example for description.
  • the reflection of the third half mirror unit 4 is taken as an example for description in this embodiment.
  • the reflection and exit light path of the third half mirror unit 4 is consistent with the exit direction of the transmission and exit light path of the third half mirror unit 4, and both are directed toward the reflective surface of the first half mirror unit 3. It is used as the reflected incident light of the first half mirror unit 3.
  • the reflected light path of the third half mirror unit 4 and the transmitted light path of the third half mirror unit 4 (equivalent to the second half mirror unit
  • the reflected light path of the mirror unit 9) forms two light beams with different depths of field, and they merge with a light beam with the same depth of field transmitted by the first half mirror unit 3, and all of them are directed toward the condensing lens 5.
  • the half mirror unit close to the condensing lens 5 is the first half mirror unit 3, which is far away
  • the half mirror unit of the condensing lens 5 is the second half mirror unit 9; the second half mirror unit 9 is used to reflect the second light of the corresponding second image source 8, so that the second light is
  • the first half mirror unit 3 reflects to the light incident surface of the condensing lens 5; the first half mirror unit 3 is also used to transmit the first light from the corresponding first image source 1 to the entrance of the condensing lens 5. Glossy.
  • the first half mirror unit 3 directly transmits the light emitted by the first image source 1 to the condenser lens 5, and the second half mirror unit 9 transmits the second image
  • the light emitted by the source 8 is reflected as the reflected incident light path of the first half mirror unit 3, and the reflected light rays reflected by the first half mirror unit 3 are the same as those of the first half mirror unit 3.
  • the transmitted light rays are parallel or overlapped to form two light beams with different depths of field and directed toward the condensing lens 5.
  • the plurality of half mirror units are at least one of a flat mirror, a concave mirror or a convex mirror, that is, all of them can be a flat mirror, a concave mirror or a convex mirror. It can also be that only one of the half mirror units is a flat mirror, and the remaining half mirrors are concave mirrors.
  • the first half mirror 7 is one of a flat mirror, a concave mirror, or a convex mirror, so as to ensure that it has both transmission and reflection effects.
  • the concave mirror or convex mirror in this embodiment refers to a lens with transmission and reflection effects. Both concave and convex are relative to the plane and refer to the half mirror unit or the first half mirror unit. The shape of the mirror 7 surface.
  • transflective ratios of the above-mentioned transflective mirrors of different shapes can be set as required.
  • the above examples of the specific surface shapes of each half mirror unit and the first half mirror 7 are only partial options, and do not represent an enumeration of all cases.
  • the inventors of the present disclosure found that based on the comprehensive consideration of the design difficulty and imaging quality of the AR optical system, the number of half mirror units is generally set to three, which can be used for the number of corresponding image sources. There are also three, namely the AR optical system illustrated in Figure 1.
  • this embodiment also provides another depth-of-field separation structure 10.
  • the depth-of-field separation structure 10 is a microlens array, and the microlens array and the converging lens 5 are arranged in parallel;
  • the lens array is used to receive the light emitted by the image source and form multiple light beams with different depths of field to emit.
  • the AR optical system provided in this embodiment adopts a microlens array as the depth-of-field separation structure 10, uses multiple microlens units of the microlens array, and uses multiple microlens units to convert the light emitted by the image source into multiple lines with different depths of field.
  • the light beams form focal planes at different distances, so that users can see images of different depths, so as to reduce the user’s convergence and conflict during use, and improve user experience; and the microlens array makes the entire AR device compact and easy to wear or carry.
  • the microlens array can be composed of a plurality of microlens units according to a set dimension and a set arrangement pitch, and each microlens unit can reach the micrometer level.
  • the microlens array corresponds to a single image source (the first image source 1 in Figure 3).
  • the light waves emitted by the first image source 1 can be divided into many tiny parts spatially through multiple microlens units, and each part is correspondingly divided.
  • the micro lens unit is focused on the focal plane, and a series of micro lens units can obtain a plane composed of a series of focal points, thereby forming multiple beams with different depths of field.
  • the converging lens 5 provided by the embodiments of the present disclosure includes at least an aspheric lens.
  • the radius of curvature of the aspheric lens continuously changes from the center to the edge of the curvature, which can maintain good aberration correction to obtain The required performance.
  • the application of aspheric lenses brings excellent sharpness and higher resolution, and at the same time the miniaturization of the lens design becomes possible.
  • the surface of the aspheric lens is coated with an antireflection coating to increase the light transmittance of the condensing lens 5 and improve the imaging effect of the image.
  • the main optical axis of the concave mirror 6 and the main optical axis of the condensing lens 5 are set to intersect, and the intersection point is located at the second Half mirror 7 on.
  • the intersection of the main optical axis of the concave mirror 6 and the main optical axis of the condensing lens 5 is located at the optical center of the first half mirror 7.
  • the first half mirror 7 is used for The surface area for reflection and the surface area for transmission are both the largest, which further improves the brightness of the image.
  • embodiments of the present disclosure also provide an AR display device, including: an image source and the AR optical system in the foregoing embodiments, and the depth separation structure 10 in the AR optical system is arranged corresponding to the image source.
  • the AR display device includes an AR optical system with a depth-of-field separation structure 10.
  • the depth-of-field separation structure 10 is used to convert the light emitted by the image source into multiple beams with different depths of field.
  • the beams with different depths of field correspond to different object distances. , Resulting in different image distances of different images, thus forming focal planes of different distances, so that users can see images of different depths, so as to reduce the conflict between users during use and improve user experience.
  • the depth-of-field separation structure 10 is a transflective lens assembly, and the transflective mirror unit includes a plurality of half-transparent half-mirror units respectively corresponding to a plurality of image sources, and the light emitted from the respective image sources can be passed through After reflection or transmission or a combination of reflection and transmission, they are combined and projected to the condensing lens 5 to form multiple light beams with different depths of field.
  • the depth-of-field separation structure 10 may also be a microlens array, which can convert light emitted by a single image source into multiple light beams with different depths of field.
  • the AR display device provided in this embodiment further includes: an optical system frame.
  • the AR optical system can be separately fixed on the optical system frame, such as: AR glasses are formed, and the light emitted by the image source in front can be viewed through the AR glasses.
  • the specific structure of the optical system frame may not be specifically limited, and it is sufficient to ensure that each component in the AR optical system can be installed in a preset position.
  • both the AR optical system and the image source may be fixed on the optical system frame, such as forming an AR helmet or an AR device that can be directly observed, and viewing the corresponding AR device directly through the human eye. Image screen.
  • the specific structure of the optical system frame may not be specifically limited, and it is sufficient to ensure that the components and the image source in the AR optical system can be installed according to a preset position.
  • transflective components to project or reflect the light emitted from image sources with different image distances or combine transmission and reflection to form beams with different depths of field, so that different images have different depths.
  • the microlens array is used as the depth of field separation structure, the multiple microlens units of the microlens array, and the multiple microlens units can convert the light emitted by the image source into multiple light beams with different depths of field; and the microlens array makes the entire
  • the AR device has a compact structure and is easy to wear or carry.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present disclosure, unless otherwise specified, “plurality” means two or more.
  • connection should be understood in a broad sense.
  • they can be fixed or detachable.
  • the specific meanings of the above-mentioned terms in the present disclosure can be understood in specific situations.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Graphics (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Lenses (AREA)

Abstract

一种AR光学系统和AR显示设备，其中，AR光学系统包括：对应于图像源（1，2，8）的景深分离结构（10），景深分离结构（10）用于将图像源（1，2，8）射出的光线转换为多条不同景深的光束；会聚透镜（5），位于景深分离结构（10）的出射光路上，用于接收多条不同景深的光束并整形；第一半透半反镜（7），位于会聚透镜（5）远离景深分离结构（10）的一侧，用于将整形后的多条不同景深的光束向一设定方向进行反射；具有预设透反比的凹面镜（6），位于第一半透半反镜（7）的反射出光方向的一侧，凹面镜（6）的凹面朝向第一半透半反镜（7），用于将多条不同景深的光束，反射并会聚后透过第一半透半反镜（7）射入设定的观测位置。

Description

AR光学系统和AR显示设备
本申请要求于2020年3月12日提交中国专利局、申请号为202010172569.1、发明名称为“AR光学系统和AR显示设备”的中国专利申请的优先权，其内容应理解为通过引用的方式并入本申请中。
技术领域
本公开涉及但不限于增强现实技术领域，具体而言，本公开涉及一种AR光学系统和AR显示设备。
背景技术
AR(Augmented Reality，增强现实)也被称为混合现实，其原理是通过电脑技术，将虚拟的信息应用到真实世界，真实的环境和虚拟的物体实时地叠加到了同一个画面或空间同时存在。目前，人们可以通过穿戴式设备，如AR眼镜或AR头盔等，与真实世界进行互动。
正常人眼在进行视物时，双眼视线的夹角与单眼的对焦深度成一定比例关系，当打破这种关系时，人眼会感觉不舒适，甚至出现头晕恶心的症状，这种现象被作辐辏冲突。
由于在传统的AR眼镜或AR头盔中，显示屏通过双眼视差来营造立体的感觉，但是由于双眼对应的显示屏与人眼的距离相同，因此在观看不同深度的立体图像时，单眼的聚焦深度始终为一个平面，与双眼的旋转角度不相符，导致长时间使用出现头晕的症状，严重时更能导致双眼的斜视及弱视等症状。
发明内容
以下是对本公开详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
第一个方面，本公开实施例提供了一种AR光学系统，包括：
对应于图像源的景深分离结构，所述景深分离结构用于将所述图像源射出的光线转换为多条不同景深的光束；
会聚透镜，位于所述景深分离结构的出射光路上，用于接收所述多条不同景深的光束并进行整形；
第一半透半反镜，位于所述会聚透镜远离所述景深分离结构的一侧，用于将整形后的多条所述不同景深的光束向一设定方向进行反射；
具有预设透反比的凹面镜，位于所述第一半透半反镜的反射出光方向的一侧，所述凹面镜的凹面朝向所述第一半透半反镜，用于将多条所述不同景深的光束，反射并会聚后透过所述第一半透半反镜射入设定的观测位置。
在一个示例性的实现方式中，所述景深分离结构为透反镜组件，所述透反镜组件包括：多个具有预设透反比的半透半反镜单元；多个所述半透半反镜单元间隔布置，用于分别对应不同物距的所述图像源；
多个所述半透半反镜单元中，至少部分的所述半透半反镜单元的出射光路朝向所述会聚透镜的入光面；朝向所述会聚透镜的入光面之外的那一部分所述半透半反镜单元的出射光路，经其他的所述半透半反镜单元的透射和/或反射后朝向所述会聚透镜的入光面；多个所述半透半反镜单元用于分别将各自对应的所述图像源射出的光线经反射和/或透射后形成多条所述不同景深的光束并射向述会聚透镜。
在一个示例性的实现方式中，距离所述会聚透镜最近的所述半透半反镜单元为第一半透半反镜单元，距离所述会聚透镜最远的所述半透半反镜单元为第二半透半反镜单元；位于所述第一半透半反镜单元与所述第二半透半反镜单元之间的所述半透半反镜单元均为第三半透半反镜单元；
所述第二半透半反镜单元用于反射对应的第二图像源的第二光线，使得所述第二光线透过各所述第三半透半反镜单元后，被所述第一半透半反镜单元反射至所述会聚透镜的入光面；
第N个所述第三半透半反镜单元还用于反射对应的第三图像源的第三光线，使得所述第三光线被所述第一半透半反镜单元反射至所述会聚透镜的入光面；或者，使得所述第三光线透过第N-1至第1个所述第三半透半反镜单 元后，被所述第一半透半反镜单元反射至所述会聚透镜的入光面；N为正整数；最靠近所述第一半透半反镜单元的所述第三半透半反镜单元为第1个所述第三半透半反镜单元；
所述第一半透半反镜单元还用于将对应的第一图像源的第一光线透射至所述会聚透镜的入光面。
在一个示例性的实现方式中，靠近所述会聚透镜的所述半透半反镜单元为第一半透半反镜单元，远离所述会聚透镜的所述半透半反镜单元为第二半透半反镜单元；
所述第二半透半反镜单元用于反射对应的第二图像源的第二光线，使得所述第二光线被所述第一半透半反镜单元反射至所述会聚透镜的入光面；所述第一半透半反镜单元还用于将对应的第一图像源的第一光线透射至所述会聚透镜的入光面。
在一个示例性的实现方式中，多个所述半透半反镜单元为平面镜、凹面镜或凸形面镜中的至少一种；
和/或，所述第一半透半反镜为平面镜、凹形面镜或凸形面镜中的一种。
在一个示例性的实现方式中，所述半透半反镜单元的数量为三个。
在一个示例性的实现方式中，所述景深分离结构为微透镜阵列，所述微透镜阵列与所述会聚透镜平行布置；
所述微透镜阵列用于接收所述图像源射出的光线并形成多条所述不同景深的光束射出。
在一个示例性的实现方式中，所述会聚透镜至少包括非球面透镜；
和/或，所述会聚透镜的表面镀有增透膜。
在一个示例性的实现方式中，所述凹面镜的主光轴与所述会聚透镜的主光轴相交于所述第一半透半反镜。
第二个方面，本公开实施例还提供了一种AR显示设备，包括：图像源以及第一个方面所述的AR光学系统，所述AR光学系统中的景深分离结构与所述图像源对应设置。
在一个示例性的实现方式中，AR显示设备还包括光学系统框架；所述AR光学系统固定在所述光学系统框架上；或者，所述AR光学系统和所述图像源均固定在所述光学系统框架上。
本公开实施例提供的技术方案带来的有益技术效果是：
本公开附加的方面和优点将在下面的描述中部分给出，这些将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解，其中：
图1为本公开实施例提供的一种AR光学系统和对应图像源的结构示意图；
图2为本公开实施例提供的另一种AR光学系统和对应图像源的结构示意图；
图3为本公开实施例提供的又一种AR光学系统和对应图像源的结构以及该结构所对应的图像深度示意图。
具体实施方式
下面详细描述本公开，本公开的实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的部件或具有相同或类似功能的部件。此外，如果已知技术的详细描述对于示出的本公开的特征是不必要的，则将其省略。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能解释为对本公开的限制。
本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)，具有与本公开所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语，应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非像这里一 样被特定定义，否则不会用理想化或过于正式的含义来解释。
本技术领域技术人员可以理解，除非特意声明，这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是，本公开的说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件，但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和/或它们的组。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。
下面以具体地实施例对本公开的技术方案以及本公开的技术方案进行详细说明。
如图1所示，本公开实施例提供了一种AR光学系统，包括：景深分离结构10、会聚透镜5、第一半透半反镜7和具有预设透反比的凹面镜6。
其中，景深分离结构10与图像源对应设置，景深分离结构10用于将图像源射出的光线转换为多条不同景深的光束。
会聚透镜5位于景深分离结构10的出射光路上，用于接收多条不同景深的光束并进行整形。
第一半透半反镜7位于会聚透镜5远离景深分离结构10的一侧，用于将整形后的多条不同景深的光束向一设定方向进行反射。
凹面镜6位于第一半透半反镜7的反射出光方向的一侧，凹面镜6的凹面朝向第一半透半反镜7，用于将多条不同景深的光束，反射并会聚后透过第一半透半反镜7射入设定的观测位置。
本实施例提供的AR光学系统，利用景深分离结构10将图像源射出的光线转换为多条不同景深的光束，由于不同景深的光束对应不同的物距，导致不同像的像距不同，从而形成不同距离的焦面，使得用于能够看到不同深度的图像，以减弱用户在使用时的辐辏冲突，提升用户体验。
在一示例性的实施方式中，根据景深分离结构10的具体实现结构，图像源根据实际需要可以设置为多个，也可以设置为单个。以图1为例，本实施例中的图像源至包括图中第一图像源1、第二图像源8或者第一图像源1中的至少一个，以下各实施例中可同样参考。
本实施例中，不同景深的光束是指光束在整个光学系统中的光路距离不同，且每一条光束指代同一景深的所有光线的集合，将所有光线抽象为一条光束以便于对整个光路系统的描述。
在一示例性的实施方式中，对于单个图像源(一般为面光源，由多个点光源组成)而言，代表同一景深的一条光束可以表示该图像源的所有射出光线的集合，当然也可以是部分射出光线的集合，每一条光束即可产生对应深度的图像效果。其中，光束的数量可根据景深分离结构10的具体实现结构确定，此处可不作具体限定。
在本实施例中，对于多条不同景深的光束，各条光束中的光线是由图像源中的多个点光源发散射出，导致光束中的部分光线呈发散状态，降低了成像效果。因此，需要对光线进行会聚整形以提高出光效果。在一示例性的实施方式中，将会聚透镜5布置在景深分离结构10的出射光路上，由于会聚透镜5是中央较厚、边缘较薄的透镜，具有会聚光线的作用，从而将景深分离结构10射出的多条不同景深的光束进行会聚整形，提高出光效果。
在一示例性的实施方式中，由会聚透镜5射出的整形后的多条不同景深的光束，其中有部分无效光线直接经第一半透半反镜7透射出去，但对整个有效光线的传播基本无影响，因此，可以将第一半透半反镜7反射至凹面镜6的光束数量看作是没有变化，仅光束中的部分无效的光线直接透射射出，即凹面镜6接收到的多条不同景深的光束的数量与经会聚透镜5整形后的多条不同景深的光束的数量保持一致。
本实施例中，具有预设的透反比凹面镜6可以是全反射的凹面镜6(即透射率为零)，凹面镜6对第一半透半反镜7反射过来的光束进行会聚，凹面镜6的凹面朝向第一半透半反镜7，将多条不同景深的光束中的光线反射至凹面镜6的镜前焦点，多条不同景深的光束中的光线均在该焦点处会聚，然后透过第一半透半反镜7射入设定的观测位置。
在一示例性的实施方式中，凹面镜6还可以是同时具有透射和反射效果的透镜，保证部分环境光进入AR光学系统射入设定的观测位置，以提高与现实场景的融合效果。对于具有透射和反射效果的凹面镜6而言，凹面镜6的整体厚度需要均匀设置，以保证成像效果。其中，设定的观测位置一般是 指人眼所在的位置。
本实施例中的图像源可以是液晶附硅(LCOS，Liquid Crystal on Silicon)显示面板，也可以是有机发光半导体(OLED，Organic Light Emitting Diode)显示面板，还可以是液晶显示面板(LCD，Liquid Crystal Display)。
本实施例中的第一半透半反镜7以及后续各实施例中的半透半反镜单元中，透射和反射的比例(简称透反比)可以有多种组合，并不局限表示一半为透射和一半为反射(即透反比为50％比50％)的情况，还可以包括：透反比为30％比70％或者60％与90％等其它透反比的情况，具体的透反比根据光学系统的实际需求进行设定，此处不作具体限定。
此外，本实施例及以下各实施例中的“多个”指两个或者两个以上，“多条”指两条或者两条以上，依此类推。
在上述实施例的基础上，本公开的发明人考虑到，对于多个图像源而言，需要设置对应的透反镜，并利用透反镜的组合实现才能实现不同图像源与会聚透镜5的光路距离不同，从而形成对应不同图像源的具有不同景深的光束。为此，本公开实施例为景深分离结构10提供如下一种示例性的实现方式：
景深分离结构10为透反镜组件，透反镜组件包括：多个具有预设透反比的半透半反镜单元；多个半透半反镜单元间隔布置，用于分别对应不同物距的图像源。
多个半透半反镜单元中，至少部分的半透半反镜单元的出射光路朝向会聚透镜5的入光面；朝向会聚透镜5的入光面之外的那一部分半透半反镜单元的出射光路，经其他的半透半反镜单元的透射和/或反射后直接朝向会聚透镜5的入光面。
多个半透半反镜单元用于分别将各自对应的图像源射出的光线经反射或者透射、或者反射与透射相结合的方式射出，从而形成多条不同景深的光束并射向会聚透镜5。
在一示例性的实施方式中，多个半透半反镜单元中，可以是全部的半透半反镜单元的出射光路朝向会聚透镜5的入光面，例如：多个半透半反镜单元在均通过反射后使对应的反射光路朝向会聚透镜5的入光面，只不过不同 位置的半透半反镜单元可能需要经过其他的半透半反镜单元透射之后才能直接射向会聚透镜5的入光面，但是各半透半反镜单元的反射出射光路的方向是一致的。
本实施例中的直接朝向会聚透镜5的入光面仅表示出光方向，不表示半透半反镜单元的出射光路直接射向会聚透镜5的入光面，中间可能会经过其他半透半反镜单元的透射或者反射才能直接射向聚透镜的入光面。
当然，也可能会存在仅有部分的半透半反镜单元的出射光路朝向会聚透镜5的入光面之外的情况，这一部分半透半反镜单元(指朝向会聚透镜5的入光面之外的半透半反镜单元)的出射光路可借助多个半透半反镜单元中其它的半透半反镜单元的透射或者反射之后朝向会聚透镜5的入光面，或者通过透射与反射的组合之后朝向会聚透镜5的入光面。
各自对应的图像源射出的光线，经多个半透半反镜单元的反射或者透射、或者反射与透射(反射和透射的次数可以根据实际结构需要具体设定)相结合的方式射出，由于图像源的物距不同，到达会聚透镜5的入光面时即可形成多条不同景深的光束。
本实施例中不同物距的图像源是指图像源的发光面发射的光线距离会聚透镜5的入光面或者人眼观测位置的传播距离不相同，以便于通过反射或者透射形成多条不同景深的光束。
此外，本实施例中的朝向会聚透镜5的入光面的光路是指能够从会聚透镜5射入并会聚整形后射向第一半透半反镜7。
在上述实施例的基础上，继续参阅1，当透反镜组件中的半透半反镜单元的数量为三个或者三个以上时，首先对多个半透半反镜单元进行分类，具体分类如下：
距离会聚透镜5最近的半透半反镜单元为第一半透半反镜单元3，距离会聚透镜5最远的半透半反镜单元为第二半透半反镜单元9；位于第一半透半反镜单元3与第二半透半反镜单元9之间的半透半反镜单元均为第三半透半反镜单元4。
其中，第二半透半反镜单元9用于反射对应的第二图像源8的第二光线， 使得第二光线透过各第三半透半反镜单元4后，被第一半透半反镜单元3反射至会聚透镜5的入光面。
第三半透半反镜单元4的个数为N，N为正整数。第N个第三半透半反镜单元4还用于反射对应的第三图像源2的第三光线，使得第三光线被第一半透半反镜单元3反射至会聚透镜5的入光面；或者，使得第三光线透过第N-1至第1个第三半透半反镜单元4后，被第一半透半反镜单元3反射至会聚透镜5的入光面。在一示例性的实施方式中，最靠近第一半透半反镜单元3的第三半透半反镜单元4为第1个第三半透半反镜单元4。
第一半透半反镜单元3还用于将对应的第一图像源1的第一光线透射至会聚透镜5的入光面。
本实施例中，第三半透半反镜单元4的数量N可以是1个，也可以是多个，根据实际需要进行设置，每个第三半透半反镜单元4均对应一个第三图像源2。本实施例和附图中以一个第三半透半反镜单元4为例进行说明。
第一半透半反镜单元3的反射出光方向和透射出光方向平行，且均朝向会聚透镜5的入光面，第一半透半反镜单元3将第一图像源1射出的光线透射射出或者反射后形成一条具有同一景深的光束射向会聚透镜5。本实施例中的第一半透半反镜单元3将第一图像源1射出的第一光线以透射射出为例进行说明。
第二半透半反镜单元9将第二图像源8射出的第二光线经透射或者反射后射出，本实施例中以第二半透半反镜单元9的反射为例进行说明。经第二半透半反镜单元9反射后的光束射向第三半透半反镜单元4，作为第三半透半反镜单元4的入射光路(可以为透射或者反射)，本实施例中将第二半透半反镜单元9反射出的光束作为第三半透半反镜单元4的透射入射光路为例进行说明。
同时，第三半透半反镜单元4将第三图像源8射出的第三光线经透射或者反射后，本实施例中以第三半透半反镜单元4的反射为例进行说明。第三半透半反镜单元4的反射出射光路与第三半透半反镜单元4的透射出射光路的出射方向一致，均射向第一半透半反镜单元3的反射面，以作为第一半透半反镜单元3的反射入光光线。经第一半透半反镜单元3反射后，第三半透 半反镜单元4的反射出射光路以及第三半透半反镜单元4的透射出射光路(相当于第二半透半反镜单元9的反射出射光路)形成两条不同景深的光束，并且与第一半透半反镜单元3透射出的一条同一景深的光束汇合，并全部射向会聚透镜5。
在一示例性的实施方式中，参考图2，半透半反镜单元的数量仅为两个时，靠近会聚透镜5的半透半反镜单元为第一半透半反镜单元3，远离会聚透镜5的半透半反镜单元为第二半透半反镜单元9；第二半透半反镜单元9用于反射对应的第二图像源8的第二光线，使得第二光线被第一半透半反镜单元3反射至会聚透镜5的入光面；第一半透半反镜单元3还用于将对应的第一图像源1的第一光线透射至会聚透镜5的入光面。
在一示例性的实施方式中，第一半透半反镜单元3直接将第一图像源1射出的光线经透射后射向会聚透镜5，第二半透半反镜单元9将第二图像源8射出的光线经反射后作为第一半透半反镜单元3的反射入射光路，经第一半透半反镜单元3反射后的反射出光光线与第一半透半反镜单元3的透射出光光线平行或者重合，以形成两条不同景深的光束并射向会聚透镜5。
在上述各实施例的基础上，多个半透半反镜单元为平面镜、凹形面镜或凸形面镜中的至少一种，即可以全部为平面镜、凹形面镜或者凸形面镜，还可以是仅其中一个半透半反镜单元为平面镜，其余的半透半反镜为凹形面镜。可选地，第一半透半反镜7为平面镜、凹形面镜或凸形面镜中的一种，保证同时具有透射和反射效果即可。本实施例中的凹形面镜或凸形面镜是指具有透射和反射效果的透镜，凹形和凸形均相对于平面而言，指代半透半反镜单元或者第一半透半反镜7表面的形状。
上述不同面型的半透半反镜均可以根据需要设置各自对应的透反比。此外，以上关于各半透半反镜单元和第一半透半反镜7的具体面型示例仅为部分可选方式，不代表全部情况的列举。
在上述各实施例中，本公开的发明人发现，基于AR光学系统设计难度和成像质量的综合考虑，半透半反镜单元的数量设置一般设置为三个，可用于对应的图像源的数量也为三个，即图1中所示例的AR光学系统。
在上述各实施例的基础上，本实施例还提供了另外一种景深分离结构10， 如图3所示，该景深分离结构10为微透镜阵列，微透镜阵列与会聚透镜5平行布置；微透镜阵列用于接收图像源射出的光线并形成多条不同景深的光束射出。
本实施例提供的AR光学系统，采用微透镜阵列作为景深分离结构10，利用微透镜阵列的多个微透镜单元，利用多个微透镜单元可将图像源射出的光线转换为多条不同景深的光束，从而形成不同距离的焦面，使得用于能够看到不同深度的图像，以减弱用户在使用时的辐辏冲突，提升用户体验；而且微透镜阵列使得整个AR设备的结构紧凑，便于佩戴或携带。
在一示例性的实施方式中，微透镜阵列可由多个微透镜单元按照设定维度以及设定排列间距组成，每个微透镜单元可达到微米级。微透镜阵列对应单个图像源设置(图3中为第一图像源1)，通过多个微透镜单元可将第一图像源1发出的光波在空间上分成许多微小的部分，每一部分都被相应的微透镜单元聚焦在焦平面上，一系列微透镜单元就可以得到由一系列焦点组成的平面，从而形成多条不同景深的光束。
如图3所示，多条不同景深的光束依次经过会聚透镜5的整形、第一半透半反镜7的反射、凹面镜6的反射和会聚以及第一半透半反镜7的透射之后射入设定的观测位置，以便人眼能够观察到不同深度d的图像画面。
在上述各实施例的基础上，本公开实施例提供的会聚透镜5至少包括非球面透镜，非球面透镜的曲率半径从中心到边缘之曲率连续发生变化，可以维持良好的像差修正，以获得所需要的性能。非球面透镜的应用，带来出色的锐度和更高的分辨率，同时镜头的小型化设计成为了可能。
在一示例性的实施方式中，非球面透镜的表面镀有增透膜，用于增大会聚透镜5的透光率，提高图像的成像效果。
在上述各实施例中，为了使图像源射出的光线尽可能地射入人眼，将凹面镜6的主光轴与会聚透镜5的主光轴设置成相交的状态，且相交的交点位于第一半透半反镜7上。
本实施例中，通过上述结构设置，能够保证从会聚透镜5射出的光线尽可能地反射到凹面镜6靠近主光轴的反射面位置，从而提高了图像亮度。
在一示例性的实施方式中，凹面镜6的主光轴与会聚透镜5的主光轴的交点位于第一半透半反镜7的光心，此时第一半透半反镜7用于反射的表面积和用于透射的表面积均最大，进一步提高图像亮度。
基于同一发明构思，本公开实施例还提供了一种AR显示设备，包括：图像源以及前述各实施例中的AR光学系统，AR光学系统中的景深分离结构10与图像源对应设置。
本实施例提供的AR显示设备，包括具有景深分离结构10的AR光学系统，利用景深分离结构10将图像源射出的光线转换为多条不同景深的光束，由于不同景深的光束对应不同的物距，导致不同像的像距不同，从而形成不同距离的焦面，使得用于能够看到不同深度的图像，以减弱用户在使用时的辐辏冲突，提升用户体验。
在一示例性的实施方式中，景深分离结构10为透反镜组件，透反镜组件包括的多个半透半反镜单元分别对应多个图像源，可分别将各自图像源射出的光线经反射或者透射或者反射和透射的组合后汇合并射向会聚透镜5，形成多条不同景深的光束。此外，景深分离结构10还可以是微透镜阵列，微透镜阵列可将单个图像源射出的光线转换为多条不同景深的光束。关于AR光学系统的其它结构可参照前述各实施例的内容，此处不再详细赘述。
在上述实施例的基础上，本实施例提供的AR显示设备还包括：光学系统框架。AR光学系统可单独固定在光学系统框架上，如：形成AR眼镜，通过AR眼镜观看前方的图像源所射出的光线。本实施例中，对光学系统框架的具体结构可不作具体限定，保证能够将AR光学系统中的各部件按照预先设定的位置安装即可。
在一示例性的实施方式中，也可以将AR光学系统和图像源均固定在光学系统框架上，如：形成AR头盔或者能够直接观测的AR设备，直接通过人眼在该AR设备中观看相应的图像画面。本实施例中，对光学系统框架的具体结构可不作具体限定，保证能够将AR光学系统中的各部件以及图像源按照预先设定的位置安装即可。
本公开各实施例至少具有以下技术效果：
1、利用景深分离结构将图像源射出的光线转换为多条不同景深的光束，由于不同景深的光束对应不同的物距，导致不同像的像距不同，从而形成不同距离的焦面，使得用于能够看到不同深度的图像，以减弱用户在使用时的辐辏冲突，提升用户体验。
2、利用透反组件将不同像距的图像源射出的光线经投射或者反射或者透射与反射的结合后分别形成不同景深的光束，使不同画面的具有不同的深度。
3、采用微透镜阵列作为景深分离结构，利用微透镜阵列的多个微透镜单元，利用多个微透镜单元可将图像源射出的光线转换为多条不同景深的光束；而且微透镜阵列使得整个AR设备的结构紧凑，便于佩戴或携带。
4、通过将凹面镜的主光轴与会聚透镜的主光轴设置成相交的状态，且交点位于第一半透半反镜上，能够保证从会聚透镜射出的光线尽可能地反射到凹面镜靠近主光轴的反射面位置，从而提高了图像亮度。
在本公开的描述中，需要理解的是，术语“中心”、“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为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，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，因此不能理解为对本公开的限制。
术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本公开的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本公开中的具体含义。
在本公开的描述中，具体特征、结构、材料或者特点可以在任何的一个 或多个实施例或示例中以合适的方式结合。
以上所述仅是本公开的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (11)

  1. 一种增强现实AR光学系统，包括：
    对应于图像源的景深分离结构(10)，所述景深分离结构(10)用于将所述图像源射出的光线转换为多条不同景深的光束；
    会聚透镜(5)，位于所述景深分离结构(10)的出射光路上，用于接收多条所述不同景深的光束并进行整形；
    第一半透半反镜(7)，位于所述会聚透镜(5)远离所述景深分离结构(10)的一侧，用于将整形后的多条所述不同景深的光束向一设定方向进行反射；
    具有预设透反比的凹面镜(6)，位于所述第一半透半反镜(7)的反射出光方向的一侧，所述凹面镜(6)的凹面朝向所述第一半透半反镜(7)，用于将多条所述不同景深的光束，反射并会聚后透过所述第一半透半反镜(7)射入设定的观测位置。
  2. 根据权利要求1所述的AR光学系统，其中，所述景深分离结构(10)包括透反镜组件，所述透反镜组件包括：多个具有预设透反比的半透半反镜单元；多个所述半透半反镜单元间隔布置，用于分别对应不同物距的所述图像源；
    多个所述半透半反镜单元中，至少部分的所述半透半反镜单元的出射光路朝向所述会聚透镜(5)的入光面；朝向所述会聚透镜(5)的入光面之外的那一部分所述半透半反镜单元的出射光路，经除自身之外的其它所述半透半反镜单元的透射和/或反射后朝向所述会聚透镜(5)的入光面；
    多个所述半透半反镜单元用于分别将各自对应的所述图像源射出的光线经反射和/或透射后形成多条所述不同景深的光束并射向述会聚透镜(5)。
  3. 根据权利要求2所述的AR光学系统，其中，距离所述会聚透镜 (5)最近的所述半透半反镜单元为第一半透半反镜单元(3)，距离所述会聚透镜(5)最远的所述半透半反镜单元为第二半透半反镜单元(9)；
    位于所述第一半透半反镜单元(3)与所述第二半透半反镜单元(9)之间的所述半透半反镜单元均为第三半透半反镜单元(4)；所述第二半透半反镜单元(9)用于反射对应的第二图像源(8)的第二光线，使得所述第二光线透过所述第三半透半反镜单元(4)后，被所述第一半透半反镜单元(3)反射至所述会聚透镜(5)的入光面；
    第N个所述第三半透半反镜单元(4)还用于反射对应的第三图像源(2)的第三光线，使得所述第三光线被所述第一半透半反镜单元(3)反射至所述会聚透镜(5)的入光面；或者，使得所述第三光线透过第N-1至第1个所述第三半透半反镜单元(4)后，被所述第一半透半反镜单元(3)反射至所述会聚透镜(5)的入光面；其中，N为正整数；最靠近所述第一半透半反镜单元(3)的所述第三半透半反镜单元(4)为第1个所述第三半透半反镜单元(4)；
    所述第一半透半反镜单元(3)还用于将对应的第一图像源(1)的第一光线透射至所述会聚透镜(5)的入光面。
  4. 根据权利要求2所述的AR光学系统，其中，靠近所述会聚透镜(5)的所述半透半反镜单元为第一半透半反镜单元(3)，远离所述会聚透镜(5)的所述半透半反镜单元为第二半透半反镜单元(9)；
    所述第二半透半反镜单元(9)用于反射对应的第二图像源(8)的第二光线，使得所述第二光线被所述第一半透半反镜单元(3)反射至所述会聚透镜(5)的入光面；
    所述第一半透半反镜单元(3)还用于将对应的第一图像源的第一光线透射至所述会聚透镜(5)的入光面。
  5. 根据权利要求2所述的AR光学系统，其中，多个所述半透半反 镜单元为平面镜、凹形面镜或凸形面镜中的至少一种；
    和/或，所述第一半透半反镜(7)为平面镜、凹形面镜或凸形面镜中的一种。
  6. 根据权利要求3所述的AR光学系统，其中，所述半透半反镜单元的数量为三个。
  7. 根据权利要求1所述的AR光学系统，其中，所述景深分离结构(10)为微透镜阵列，所述微透镜阵列与所述会聚透镜(5)平行布置；
    所述微透镜阵列用于接收所述图像源射出的光线并形成多条所述不同景深的光束射出。
  8. 根据权利要求1所述的AR光学系统，其中，所述会聚透镜(5)至少包括非球面透镜；
    和/或，所述会聚透镜(5)的表面镀有增透膜。
  9. 根据权利要求1至8中任一项所述的AR光学系统，其中，所述凹面镜(6)的主光轴与所述会聚透镜(5)的主光轴相交于所述第一半透半反镜(7)。
  10. 一种AR显示设备，包括：图像源以及如权利要求1至8中任一项所述的AR光学系统，所述AR光学系统中的景深分离结构(10)与所述图像源对应设置。
  11. 根据权利要求10所述的AR显示设备，还包括光学系统框架；
    其中，所述AR光学系统固定在所述光学系统框架上；
    或者，所述AR光学系统和所述图像源均固定在所述光学系统框架上。
PCT/CN2021/071039 2020-03-12 2021-01-11 Ar光学系统和ar显示设备 WO2021179786A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/424,506 US20220317448A1 (en) 2020-03-12 2021-01-11 AR Optical System and AR Display Device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010172569.1 2020-03-12
CN202010172569.1A CN111338081A (zh) 2020-03-12 2020-03-12 Ar光学系统和ar显示设备

Publications (1)

Publication Number Publication Date
WO2021179786A1 true WO2021179786A1 (zh) 2021-09-16

Family

ID=71182404

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/071039 WO2021179786A1 (zh) 2020-03-12 2021-01-11 Ar光学系统和ar显示设备

Country Status (3)

Country Link
US (1) US20220317448A1 (zh)
CN (1) CN111338081A (zh)
WO (1) WO2021179786A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111338081A (zh) * 2020-03-12 2020-06-26 京东方科技集团股份有限公司 Ar光学系统和ar显示设备
CN112882240A (zh) * 2021-03-16 2021-06-01 拾斛科技(南京)有限公司 显示装置以及显示方法
CN113376837A (zh) * 2021-06-09 2021-09-10 Oppo广东移动通信有限公司 近眼显示光学系统、近眼显示设备及方法
CN114002861A (zh) * 2021-10-14 2022-02-01 北京航空航天大学 一种深度增强的集成成像3d显示装置
WO2023133733A1 (en) * 2022-01-12 2023-07-20 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Display device
CN115291412B (zh) * 2022-09-30 2023-01-24 南方科技大学 基于ar几何光波导的三维显示装置和三维显示方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102053377A (zh) * 2010-10-08 2011-05-11 刘武强 一种三维立体成像设备和系统
CN109581678A (zh) * 2017-09-29 2019-04-05 中强光电股份有限公司 近眼光场显示装置及近眼显示装置
CN110095870A (zh) * 2019-05-28 2019-08-06 京东方科技集团股份有限公司 光学显示系统、显示控制装置和增强现实设备
US20190317320A1 (en) * 2018-04-11 2019-10-17 Korea Institute Of Science And Technology Multi-focal augmented reality device
CN110727111A (zh) * 2019-10-23 2020-01-24 深圳惠牛科技有限公司 一种头戴显示光学系统及头戴显示设备
CN111338081A (zh) * 2020-03-12 2020-06-26 京东方科技集团股份有限公司 Ar光学系统和ar显示设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201128225A (en) * 2010-02-12 2011-08-16 Young Optics Inc Light-mixing device
JP7165029B2 (ja) * 2017-12-05 2022-11-02 信越化学工業株式会社 反射防止積層膜、反射防止積層膜の形成方法、及び眼鏡型ディスプレイ
CN108803026A (zh) * 2018-03-26 2018-11-13 成都理想境界科技有限公司 一种近眼显示系统
CN208421423U (zh) * 2018-07-09 2019-01-22 深圳市昊日科技有限公司 一种基于透明屏幕的ar成像系统
CN108761794A (zh) * 2018-07-09 2018-11-06 深圳市昊日科技有限公司 一种基于透明屏幕的ar成像系统
CN111610636A (zh) * 2019-02-26 2020-09-01 弗提图德萨沃有限公司 一种光学模组中显示器件的装调系统及方法
CN110208951A (zh) * 2019-07-19 2019-09-06 业成科技（成都）有限公司 头戴虚拟现实显示装置之薄轻光学系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102053377A (zh) * 2010-10-08 2011-05-11 刘武强 一种三维立体成像设备和系统
CN109581678A (zh) * 2017-09-29 2019-04-05 中强光电股份有限公司 近眼光场显示装置及近眼显示装置
US20190317320A1 (en) * 2018-04-11 2019-10-17 Korea Institute Of Science And Technology Multi-focal augmented reality device
CN110095870A (zh) * 2019-05-28 2019-08-06 京东方科技集团股份有限公司 光学显示系统、显示控制装置和增强现实设备
CN110727111A (zh) * 2019-10-23 2020-01-24 深圳惠牛科技有限公司 一种头戴显示光学系统及头戴显示设备
CN111338081A (zh) * 2020-03-12 2020-06-26 京东方科技集团股份有限公司 Ar光学系统和ar显示设备

Also Published As

Publication number Publication date
CN111338081A (zh) 2020-06-26
US20220317448A1 (en) 2022-10-06

Similar Documents

Publication Publication Date Title
WO2021179786A1 (zh) Ar光学系统和ar显示设备
US10436951B2 (en) Display device with total internal reflection
US20170059869A1 (en) Optical system for head mount display
WO2020010703A1 (zh) 光学系统、头戴显示设备及智能眼镜
JP2010538313A (ja) 広視野角を有する現実的画像表示装置
CN115268082A (zh) 头戴式显示装置
US11754838B2 (en) Near-eye optical system
CN111417891B (zh) 光导、成像设备和具有分开的成像通道的hmd
CN209400804U (zh) 增强现实光学模组及头戴式显示装置
US11209653B2 (en) Near-eye display apparatus
US10989956B2 (en) Display device
WO2020124627A1 (zh) 一种近眼显示系统及眼镜式虚拟显示器
CN112444979A (zh) 近眼显示光学系统和近眼显示设备
CN102253491A (zh) 不对等焦距、高放大倍率的虚像显示光机
US20220276471A1 (en) Camera module using small reflector, and optical device for augmented reality using same
US11644673B2 (en) Near-eye optical system
WO2019087996A1 (ja) 網膜投影装置、網膜投影システム
CN114326123B (zh) 一种近眼显示装置
CN115657310A (zh) 近眼显示模组以及头戴显示设备
CN210982912U (zh) 近眼显示光学系统和近眼显示设备
KR20040005031A (ko) 단판식 헤드마운트 디스플레이의 광학시스템
CN111474719A (zh) 波导装置和增强现实设备
CN115857177B (zh) 一种增强现实显示设备
CN215729102U (zh) 一种双焦面ar光学系统及ar显示设备
CN218675347U (zh) 光学模组以及头戴显示设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21767953

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21767953

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 03/05/2023)

122 Ep: pct application non-entry in european phase

Ref document number: 21767953

Country of ref document: EP

Kind code of ref document: A1