WO2022002140A1 - 光学装置及近眼显示设备 - Google Patents
光学装置及近眼显示设备 Download PDFInfo
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- WO2022002140A1 WO2022002140A1 PCT/CN2021/103589 CN2021103589W WO2022002140A1 WO 2022002140 A1 WO2022002140 A1 WO 2022002140A1 CN 2021103589 W CN2021103589 W CN 2021103589W WO 2022002140 A1 WO2022002140 A1 WO 2022002140A1
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- light
- unit
- polarizing
- angle
- angle selection
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays 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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/288—Filters employing polarising elements, e.g. Lyot or Solc filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
-
- 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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B2027/0178—Eyeglass type
Definitions
- the present application relates to the field of optical technology, and in particular, to an optical device and a near-eye display device.
- a near-eye display system it is usually necessary to zoom in and display a picture to be displayed.
- the distance between a light-emitting source (eg, a display screen of an electronic device) and an optical device (eg, a near-eye display device) is usually distanced.
- the distance is used to increase the field of view of the light entering the optical device, so as to enlarge the image, and then enter the human eye after changing the direction of the optical path through the optical device.
- the optical device in order for the optical device to completely receive all the light within the field of view, it is usually necessary to form a light inlet with a larger diameter on the optical device, which will lead to the problem of a larger overall thickness of the optical device.
- the embodiments of the present application provide an optical device and a near-eye display device to solve the problem of the relatively thick overall thickness of the near-eye display device in the prior art.
- an embodiment of the present application provides an optical device, including a light source, an angle selection unit, a light conversion unit, a first polarizing unit, a second polarizing unit, and a lens, the first polarizing unit is disposed on the the light-emitting side of the light source, and the first surface of the first polarizing unit faces the light-emitting surface of the light-emitting source; the angle selection unit is arranged opposite to the first polarizing unit, and the light conversion unit is arranged at the angle The selection unit is away from the side of the first polarization unit; the second polarization unit is arranged opposite to the angle selection unit, and the mirror is arranged opposite to the light conversion unit.
- embodiments of the present application provide a near-eye display device, including the optical device.
- the first polarization unit is disposed on the light-emitting side of the light-emitting source, and the first surface of the first polarization unit faces the light-emitting surface of the light-emitting source;
- the angle selection unit is disposed opposite to the first polarization unit, and the light conversion unit is disposed at the angle The side of the selection unit away from the first polarization unit, so that the light can penetrate the angle selection unit after being reflected at least once between the angle selection unit and the second polarization unit, and after the vibration direction of the light is converted by the light conversion unit, from the first polarization unit.
- Two polarizing units pass through.
- the propagation distance of the light emitted by the light emitting source inside the optical device can be extended, so that the image can be enlarged inside the optical device. Since the image can be enlarged inside the optical device, the difference between the light source and the optical device can be appropriately reduced The distance between the optical devices, that is, to reduce the field of view angle of the light emitted by the light-emitting source entering the optical device, so that the size of the light inlet of the optical device can be adaptively reduced, thus solving the problem of The problem that the overall thickness of the optical device is too large due to the large light inlet opening on the optical device.
- FIG. 1 is one of the schematic structural diagrams of an optical device provided by an embodiment of the present application.
- FIG. 2 is a second schematic structural diagram of an optical device provided by an embodiment of the present application.
- FIG. 3 is a third schematic structural diagram of an optical device provided by an embodiment of the present application.
- FIG. 4 is a fourth schematic structural diagram of an optical device provided by an embodiment of the present application.
- FIG. 5 is a fifth schematic structural diagram of an optical device provided by an embodiment of the present application.
- first, second and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and distinguish between “first”, “second”, etc.
- the objects are usually of one type, and the number of objects is not limited.
- the first object may be one or more than one.
- “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the associated objects are in an "or” relationship.
- the optical device includes a light source 100, an angle selection unit 200, a light conversion unit 300, a first polarizing unit 400, a second polarizing unit 500 and Lens 600, the first polarizing unit 400 is disposed on the light-emitting side of the light-emitting source 100, and the first surface of the first polarizing unit 400 faces the light-emitting surface of the light-emitting source 100; the angle selection unit 200 and the The first polarizing unit 400 is disposed opposite to each other, and the light converting unit 300 is disposed on the side of the angle selecting unit 200 away from the first polarizing unit 400 ; the second polarizing unit 500 and the angle selecting unit 200 Oppositely disposed, the lens 600 is disposed opposite to the light conversion unit 300 .
- the light-emitting source 100 can be a point light source or a surface light source, for example, it can be a surface light source formed by a display screen of an electronic device when displaying a picture, and the propagation path of the light emitted by the light-emitting source 100 can be changed by the above-mentioned optical device, so as to facilitate the display of the light source 100.
- the content displayed on the screen is enlarged, the content displayed on the screen is projected in the specified direction.
- the above-mentioned first polarizing unit 400 may include one or more first polarizers arranged in layers, wherein the first polarizer may be an absorbing polarizer.
- the first polarizing unit 400 may also be a lens group formed by a combination of multiple optical lenses, and the light emitted by the light-emitting source 100 may be reflected and/or refracted multiple times through the multiple optical lenses to form polarization Light.
- the first direction is denoted as the direction of the light transmission axis of the first polarizing unit 400 . In this way, when the light emitted by the light source 100 enters the first polarizing unit 400 , only the light vibrating in the first direction can pass through, and the light vibrating in other directions will be blocked by the first polarizing unit 400 .
- the first end of the angle selection unit 200 and the first end of the second polarization unit 500 are spaced apart, so as to form an intrusion between the angle selection unit 200 and the second polarization unit 500 In the light port 120 , the light emitted by the light source 100 can enter between the angle selection unit 200 and the second polarizing unit 500 through the light entrance port 120 .
- the first end of the angle selection unit 200 is the end of the angle selection unit 200 close to the first polarization unit 400
- the first end of the second polarization unit 500 is the end of the second polarization unit 500 close to the One end of the first polarizing unit 400 .
- the above-mentioned first polarizing unit 400 may be disposed facing the light entrance 120, so that the light emitted by the light exit surface of the light source 100 can pass through the first polarizing unit 400, and then enter the angle selection from the light entrance 120. between the unit 200 and the second polarizing unit 500 . Since the direction of the light transmission axis of the first polarizing unit 400 is the first direction, that is, only the light oscillating in the first direction of the light emitted by the light emitting source 100 can penetrate the first polarizing unit 400, thereby ensuring that it enters the first polarizing unit 400.
- the light between the angle selection unit 200 and the second polarizing unit 500 is all linearly polarized light polarized in the first direction.
- all the light rays entering the optical device can have the same vibration direction, and at the same time, the second polarizing unit 500 is arranged, and the second polarizing unit 500 is opposite to the angle selection unit.
- the direction of the optical axis can further avoid the influence of stray light on the imaging effect, thereby improving the imaging effect of the optical device.
- the above-mentioned angle selection unit 200 may include a light-transmitting body and an angle-selective film disposed on the surface of the light-transmitting body, wherein the angle-selective film can reflect incident light within a certain angle range (eg, 0 to 45°), At the same time, incident light outside the angular range (eg, 45° to 90°) may be transmitted.
- the first interval is used to represent the angle interval that will be able to penetrate the angle selective film
- the second interval is used to represent the angle interval reflected by the angle selective film.
- the angle selection film may adopt the structure of the angle selection film commonly used in the prior art, for example, a Bragg mirror layer or a distributed Bragg reflector (Distributed Bragg reflector, DBR) layer may be used.
- the DBR layer exhibits angle-selective reflectivity, so it can reflect light beams within a certain range of incident angles and transmit other light beams with incident angles outside the range.
- the angle-selective film can also be a laminated structure of TiO2 and SiO2. By matching the thickness of each layer in the laminated structure, light with an incident angle greater than 45° is mainly transmitted, while light with an incident angle of less than 45° is mainly reflected.
- the angle parameters can be adjusted by different ones of the coating films.
- the above-mentioned second polarizing unit 500 may include one or more second polarizers arranged in layers, wherein the second polarizer may be a reflective polarizer, when the second polarizing unit 500 includes a plurality of second polarizers arranged in layers.
- the direction of the light transmission axis of each of the second polarizers is the same, and the second direction is hereinafter referred to as the direction of the light transmission axis of the second polarizing unit 500 .
- the second direction is hereinafter referred to as the direction of the light transmission axis of the second polarizing unit 500 .
- the above-mentioned light conversion unit 300 can be a vibration direction phase retarder for converting light, for example, can be a quarter glass, and the quarter glass can be made of double-layered quartz, calcite, or mica with precise thickness.
- Refractive wafers are made with the transmission axis parallel to the wafer surface. Taking the linearly polarized light incident vertically on the wafer as an example, its vibration direction and the wafer optical axis include an angle ⁇ ( ⁇ 0°), the incident light vibration can be decomposed into perpendicular to the optical axis (o vibration) and parallel to the optical axis (e vibration). vibration) two components.
- the wave plate that can produce ⁇ /4 additional optical path difference between o light and e light is called quarter wave plate.
- the light conversion unit 300 when the light conversion unit 300 is a quarter glass, and the angle between the optical axis direction of the quarter glass and the light transmission axis direction of the first polarizing unit 900 is 45° When °, the light conversion unit 300 can change the polarization direction of the received linearly polarized light by 45° to form circularly polarized light.
- the above-mentioned mirror 600 may be a mirror with a reflective function.
- a reflective film may be provided on the surface of the mirror 600 .
- the transmitted light conversion unit 300 can be re-reflected to the light conversion unit 300 through the lens 600, so that the light passes through the light conversion unit 300 again, so as to further change the polarization direction.
- the above-mentioned lens 600 may also have a transmissive portion, so that the user can see the external environment through the lens 600 .
- the first polarizing unit 400 can only pass the polarized light with vibration in the second direction. Therefore, the first direction and the second direction can be set as different directions, so that the incident light from the second direction can be avoided.
- the light entering the port 120 directly passes through the second polarizing unit 500 .
- the angle selection unit 200 can only transmit the light with the incident angle in the first section, and the light with the incident angle in the second section will be reflected by the angle selection unit 200 .
- the target light beam entering the angle selection unit 200 at the first incident angle will be reflected between the angle selection unit 200 and the second polarization unit 500, wherein the The first incident angle is located in the second interval. Since the angle selection unit 200 and the second polarization unit 500 are disposed opposite to each other, for example, the angle between the two surfaces facing the angle selection unit 200 and the second polarization unit 500 is an acute angle, therefore, the target beam is After the second polarizing unit 500 is reflected, the size of the incident angle entering the angle selecting unit 200 will change. When the incident angle of the target beam entering the angle selecting unit 200 is in the first interval, the target The beam penetration angle selection unit 200 .
- the first polarizing unit can be arranged on the light-emitting side of the light-emitting source, and the first surface of the first polarizing unit faces the light-emitting surface of the light-emitting source; the angle selection unit is arranged opposite to the first polarizing unit, and the light conversion unit is arranged On the side of the angle selection unit away from the first polarizing unit, so that the light can be reflected between the angle selection unit 200 and the second polarizing unit 500 at least once, and then pass through the angle selection unit 200 and be converted by the light conversion unit 300. After the vibration direction of , it passes through the second polarizing unit 500 .
- the propagation distance of the light emitted by the light-emitting source 100 inside the optical device can be extended, so that the image can be enlarged inside the optical device. Since the image can be enlarged inside the optical device, the light-emitting source can be appropriately reduced
- the distance between 100 and the optical device that is, reducing the field of view angle of the light emitted by the light source 100 entering the optical device, so that the size of the light inlet of the optical device can be adaptively reduced, thereby solving the problem in the prior art.
- the overall thickness of the optical device is too large due to the need to set a larger light inlet on the optical device.
- the first light emitted by the light-emitting source 100 passes through the first polarization unit 400 and enters the angle selection unit 200;
- the first light ray is transmitted through the angle selection unit 200 and transmitted to the light conversion unit 300, and the light ray is transmitted to the light conversion unit 300.
- the conversion unit 300 converts the first light into a second light, the second light is reflected back to the light conversion unit 300 by the lens 600 , and the light conversion unit 300 converts the second light into a third light light, the third light is incident on the angle selection unit 200;
- the third light ray passes through the angle selection unit 200 and is transmitted to the second polarizing unit 500 , and penetrate the second polarizing unit 500 .
- the above-mentioned first light rays can be directly incident from the first polarizing unit 400 to the angle selecting unit 200 , or can be reflected by the second polarizing unit 500 and then incident to the angle selecting unit 200 .
- the above-mentioned first preset condition may refer to that the incident angle of the first light ray is within the above-mentioned first interval. When the incident angle of the first light ray entering the angle selection unit 200 is in the first interval, the first light ray penetrates the angle selection unit 200 and enters the light conversion unit 300.
- the second light is reflected back to the light conversion unit 300 by the lens 600, and the light conversion unit 300 converts the second light into a third light, wherein the vibration direction of the first light is the same as the vibration direction of the first light.
- the included angle between the vibration directions of the third light rays is 2 ⁇ .
- the third light passing through the light converting unit 300 is incident on the angle selecting unit 200 again, and the second preset condition may be the same as the first preset condition, that is, the incident angle is within the first interval In this way, when the incident angle of the third light entering the angle selection unit 200 is in the first interval, the third light penetrates the angle selection unit 200 and enters the second polarizing unit 500 . When the incident angle of the third light is in the second interval, the third light will be reflected between the angle selection unit 200 and the lens until the incident angle of the third light is in the first interval , passing through the angle selection unit 200 . After the third light passes through the angle selection unit 200 and is transmitted to the second polarizing unit 500, it can penetrate the second polarizing unit 500 to enter the human eye 800 for imaging.
- the second polarizing unit 500 is disposed opposite to the first polarizing unit 400;
- the first light emitted by the light-emitting source 100 passes through the first polarization unit 400 and enters the angle selection unit 200, including:
- the first light emitted by the light emitting source 100 passes through the first polarizing unit 400 , enters the second polarizing unit 500 , and is reflected by the second polarizing unit 500 , and then enters the angle selecting unit 200 .
- the first light can also be directly incident on the second polarizing unit 500 .
- the first light After the first light is incident on the second polarizing unit 500 , it is reflected by the second polarizing unit 500 and then enters the second polarizing unit 500 .
- the angle selection unit 200 penetrates the angle selection unit 200 when the incident angle of the first light entering the angle selection unit 200 is within the first interval, and when the first light enters the angle selection unit 200 When the incident angle is within the second interval, it is reflected by the angle selection unit 200 and incident on the second polarizing unit 500; the above process is repeated until the incident angle of the first light entering the angle selection unit 200 is at Within the first interval, the angle selection unit 200 is then penetrated.
- the device further includes an absorption unit 700, the absorption unit 700 is disposed on the side of the second polarizing unit 500 away from the angle selection unit 200, and the light transmission axis direction of the absorption unit 700 is the same as the direction of the light transmission axis of the absorption unit 700.
- the light transmission axis directions of the second polarizing unit 500 are the same.
- the above-mentioned absorption unit 700 may use one or more third polarizers arranged in layers, and the third polarizer may be an absorption type polarizer. Since the transmission axis direction of the absorption unit 700 is the same as the transmission axis direction of the second polarizing unit 500, the absorption unit 700 can only transmit the polarized light along the second direction. The polarized light in other directions than the two directions penetrates the second polarized lens, and can also be blocked by the absorption unit 700, thereby reducing the influence of the interference light on the imaging effect. At the same time, it can be ensured that the linearly polarized light having the second direction is transmitted, so as to facilitate normal imaging.
- the included angle between the second surface of the first polarizing unit 400 and the third surface of the second polarizing unit 500 is the first angle.
- the second surface of the first polarizing unit 400 is the surface of the first polarizing unit 400 facing the second polarizing unit 500
- the third surface of the second polarizing unit 500 is the second polarizing unit 500
- the polarizing unit 500 faces the surface on the side of the first polarizing unit 400 .
- the first angle may be 90°.
- the first angle is equal to 90°. In this way, the entry into the second polarizing unit 500 and the angle selecting unit 200 from the light entrance can be improved. between the light rays, the reflection effect between the second polarizing unit 500 and the angle selection unit 200 .
- the direction of the light transmission axis of the first polarizing unit 400 is perpendicular to the direction of the light transmission axis of the second polarizing unit 500 .
- the light conversion unit 300 can use a quarter glass, so that the angle between the vibration direction of the first light and the vibration direction of the third light can be ensured to be 90°, and the first light
- the vibration direction is the same as the light transmission axis direction of the first polarizing unit 400. Therefore, by setting the light transmission axis direction of the first polarizing unit 400 to be perpendicular to the light transmission axis direction of the second polarizing unit 500, it is convenient to The third light obtained after being converted by the light converting unit 300 can smoothly pass through the second polarizing unit 500 and the absorbing unit 700 to enter the human eye 800 for imaging.
- the included angle between the direction of the light transmission axis of the first polarizing unit 400 and the direction of the light transmission axis of the light conversion unit 300 is the second angle.
- the second angle may be 45°.
- the polarization direction of the light can be changed by 45° after each time the light passes through the light conversion unit 300 , thereby ensuring that the third light passing through the light conversion unit 300 can smoothly pass through the second polarizing unit 500 .
- the included angle between the fourth surface of the second polarizing unit 500 and the fifth surface of the angle selection unit 200 is a third angle, wherein the fourth surface faces the angle selection unit 200 , the fifth surface faces the first polarizing unit 400 .
- the third angle may be between 10° and 50°, for example, in a near-eye display device, the third angle is set to 27°.
- the image can be enlarged in the optical device. Since the image can be enlarged in the optical device, the distance between the light-emitting source 100 and the optical device can be appropriately reduced, that is, the field of view angle of the light emitted by the light-emitting source 100 entering the optical device can be reduced, so as to adapt to the In order to reduce the size of the light entrance 120 of the optical device, the overall thickness of the optical device can be reduced. By setting the above, the overall thickness of the optical device can be reduced to less than 15 mm.
- the device further includes a light-transmitting substrate 110 , the light-transmitting substrate 110 is disposed opposite to the second polarizing unit 500 , and the light-transmitting substrate 110 is located at an angle away from the second polarizing unit 500 Select one side of cell 200.
- the transparent substrate 110 may be a transparent glass sheet or a transparent plastic sheet. By disposing the transparent substrate 110, it is possible to ensure that the light can penetrate the transparent substrate 110 and realize the optical Protection of optics inside the unit.
- the device further includes a lens group 900, the lens group 900 is disposed between the light source 100 and the first polarizing unit 400, and the sixth surface of the lens group 900 faces the The light-emitting surface of the light-emitting source 100 .
- the number of the lens group 900 may be 1 or N, wherein the N is an integer greater than 1, and the sixth surface of the lens group 900 is facing the light-emitting source 100 side. surface, by arranging the lens group 900 between the light-emitting source 100 and the first polarizing unit 400, and making the sixth surface of the lens group 900 face the light-emitting surface of the light-emitting source 100, so that , the light emitted by the light emitting source 100 needs to pass through the lens group 900 before entering the first polarizing unit 400 , thereby improving the light distribution of the natural light emitted by the light emitting source 100 , thereby improving the image quality of the image transmitted through the optical device and entering the human eye 800 . image quality.
- the device further includes a first mirror 130 , the first mirror 130 is arranged parallel to the second polarizing unit 500 , and the first mirror 130 is located on the first polarizing mirror
- the first lens 130 is a convex lens or a concave lens.
- the linearly polarized light passing through the first polarizing lens needs to pass through the first lens 130 after Only then can it enter the human eye 800 , so that the definition of the picture entering the human eye 800 can be improved. It ensures that even users with nearsightedness or farsightedness can clearly view the picture with the naked eye through the optical device.
- the first lens 130 and the second polarizing unit 500 are detachably connected.
- the first lens 130 may be located on the side of the absorption unit 700 away from the angle selection unit 200 or at the side of the transparent substrate 110 away from the absorption unit 700 .
- a lens mounting position can be set on the side of the transparent substrate 110 away from the angle selection unit 200 , and all The first lens 130 is detachably connected to the lens mounting position, so as to realize the detachable connection between the first lens 130 and the second polarizing unit 500 .
- the first lens 130 and the second polarizing unit 500 by detachably connecting the first lens 130 and the second polarizing unit 500, it is convenient for different users to replace different types of the first lens 130 according to their own vision requirements, and at the same time, it is also convenient for eyesight A normal user removes the first lens 130 for viewing, so that individual needs of different users can be met.
- the second polarizing unit 500 and the angle selecting unit 200 are both sheet-like structures, so that a cavity can be formed between the second polarizing unit 500 and the angle selecting unit 200 .
- a solid structure may also be formed between the second polarizing unit 500 and the angle selecting unit 200 .
- the angle selection unit 200 includes a light-transmitting body with a triangular cross-section and an angle-selecting film disposed on the surface of the light-transmitting body. Specifically, the light-transmitting body can be close to the light conversion The surface on one side of the unit 300 is provided with the angle selection film.
- one surface of the angle selection unit 200 is in contact with the second polarizing unit 500
- the other surface of the angle selection unit 200 is in contact with the light conversion unit 300
- the angle selection unit 200 is in contact with the light conversion unit 300.
- the shape matches the cavity formed between the second polarizing unit 500 and the light converting unit 300 .
- the optical device When a solid structure is formed between the second polarizing unit 500 and the angle selection unit 200, the optical device further includes a second lens 140, the second lens 140 and the angle selection unit 200 have the same shape and size, and The second lens 140 and the angle selection unit 200 are spliced together to form a solid lens structure with a parallelogram in cross section.
- the second polarizing unit 500 and the absorbing unit 700 are disposed at the connection between the second lens 140 and the angle selecting unit 200 .
- Embodiments of the present application provide a near-eye display device including an optical device.
- the near-eye display device may be a common near-eye display device such as AR glasses.
- For the structure of the optical device reference may be made to the descriptions of the above embodiments, and details are not repeated here. Since the near-eye display device provided by the embodiment of the present invention adopts the structure of the optical device in the above-mentioned embodiment, the near-eye display device provided by the embodiment of the present invention can realize all the beneficial effects of the optical device in the above-mentioned embodiment.
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Abstract
Description
Claims (11)
- 一种光学装置,包括发光源、角度选择单元、光线转换单元、第一偏振单元、第二偏振单元和镜片,所述第一偏振单元设置在所述发光源的出光侧,且所述第一偏振单元的第一表面朝向所述发光源的出光面;所述角度选择单元与所述第一偏振单元相对设置,所述光线转换单元设置于所述角度选择单元远离所述第一偏振单元的一侧;所述第二偏振单元与所述角度选择单元相对设置,所述镜片与所述光线转换单元相对设置。
- 根据权利要求1所述的装置,其中,所述发光源发出的第一光线经过所述第一偏振单元,并入射到所述角度选择单元;在所述第一光线在所述角度选择单元的入射角满足第一预设条件的情况下,所述第一光线透过所述角度选择单元并传输至光线转换单元,所述光线转换单元将所述第一光线转换为第二光线,所述第二光线经所述镜片反射回所述光线转换单元,所述光线转换单元将所述第二光线转换为第三光线,所述第三光线入射到所述角度选择单元;在所述第三光线在所述角度选择单元的入射角满足第二预设条件的情况下,所述第三光线透过所述角度选择单元并传输至所述第二偏振单元,并穿透所述第二偏振单元。
- 根据权利要求2所述的装置,其中,所述第二偏振单元与第一偏振单元相对设置;所述发光源发出的第一光线经过所述第一偏振单元,并入射到所述角度选择单元包括:所述发光源发出的第一光线经过所述第一偏振单元,并入射到第二偏振单元,经第二偏振单元反射后,入射到所述角度选择单元。
- 根据权利要求1所述的装置,还包括吸收单元,所述吸收单元设置于所述第二偏振单元远离所述角度选择单元的一侧,所述吸收单元的透光轴方向与所述第二偏振单元的透光轴方向相同。
- 根据权利要求1所述的装置,其中,所述第一偏振单元的第二表面与所述第二偏振单元的第三表面之间的夹角为第一角度。
- 根据权利要求1所述的装置,其中,所述第一偏振单元的透光轴方向与所述第二偏振单元的透光轴方向垂直。
- 根据权利要求1所述的装置,其中,所述第一偏振单元的透光轴方向与所述光线转换单元的透光轴方向之间的夹角为第二角度。
- 根据权利要求1所述的装置,其中,所述第二偏振单元的第四表面与所述角度选择单元的第五表面之间的夹角为第三角度,其中,所述第四表面朝向所述角度选择单元,所述第五表面朝向所述第一偏振单元。
- 根据权利要求1所述的装置,还包括透光基板,所述透光基板与所述第二偏振单元相对设置,且所述透光基板位于所述第二偏振单元远离所述角度选择单元的一侧。
- 根据权利要求1所述的装置,还包括透镜组,所述透镜组设置在所述发光源的与所述第一偏振单元之间,且所述透镜组的第六表面朝向所述发光源的出光面。
- 一种近眼显示设备,包括权利要求1-10中任意一项所述的光学装置。
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