CN218630356U - Selective absorption and transmittance-adjustable optical device and augmented reality device - Google Patents
Selective absorption and transmittance-adjustable optical device and augmented reality device Download PDFInfo
- Publication number
- CN218630356U CN218630356U CN202122467343.7U CN202122467343U CN218630356U CN 218630356 U CN218630356 U CN 218630356U CN 202122467343 U CN202122467343 U CN 202122467343U CN 218630356 U CN218630356 U CN 218630356U
- Authority
- CN
- China
- Prior art keywords
- wave plate
- polarizer
- light
- optical
- optical sheet
- 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.)
- Active
Links
Images
Landscapes
- Polarising Elements (AREA)
Abstract
The utility model relates to a selective absorption and transmissivity adjustable optical device and augmented reality device, optical device includes: a first optical sheet assembly; the front surface of the first optical sheet assembly is provided with at least one first type polarizer; the first type polarizer is a polarizer rotatable with respect to the first optical sheet assembly; the reverse side of the first optical sheet component is selectively provided with at least one second optical sheet component; the first optical sheet assembly comprises: the first polaroid, the first wave plate and the second polaroid are sequentially and parallelly arranged; the first wave plate is used for rotating the vibration direction of the light with the wavelength corresponding to the first wave plate in the light after the light is incident into the first wave plate; each second optical sheet assembly comprises a second wave plate and a third polaroid which are sequentially arranged in parallel; the second wave plate is used for rotating the vibration direction of the light with the wavelength corresponding to the second wave plate in the light after the light is incident into the second wave plate.
Description
Technical Field
The utility model relates to an augmented reality technical field especially relates to a selective absorption and transmissivity adjustable optical device and augmented reality device.
Background
Augmented Reality (AR) is a technology that organically integrates an image of a virtual world and a scene of a real world, can superimpose virtual information on the real world, and has wide application in various industries. Existing augmented reality display devices (such as waveguide Birdbath and prism) have a part of light emitted to the outside, and have a light leakage phenomenon. Although a reflection eliminating device and an augmented reality display device are disclosed in patent document CN111399232a, and the reflection eliminating device eliminates or reduces light reflected and scattered to the outside by human eyes and surrounding skin when the augmented reality display device is worn, the existing augmented reality display device still has many problems, for example, in an environment with high brightness, ambient light can submerge light for displaying a virtual image, so that a wearer cannot comfortably obtain the virtual image. Meanwhile, when the existing augmented reality display device is used in an environment with high brightness, the problems of insufficient brightness or large power consumption exist.
In addition, as shown in fig. 4, the existing augmented reality display device is composed of an optical module, an optical combiner, and the like. The optical-mechanical module is used for generating optics carrying virtual image information; the light that shows virtual image partly sends the back from ray apparatus module, arrives the light combiner, then gets into people's eye from people's eye side through modes such as reflection, diffraction, and another part can be followed the outside of light combiner (facing to external environment) and launched, makes other people can see, and then probably causes the leakage of augmented reality display device demonstration information, and influences the nature of the person of wearing, pleasing to the eye, looks strangely comparatively. The wearer's location is easily exposed if the augmented reality display device is worn to participate in night military operations or other activities that require concealment.
It can be seen that the augmented reality display device in the prior art has the problems that the wearer cannot comfortably obtain a virtual image due to the inability to adjust the transmittance of light, and the wearer's position is easily exposed due to the inability to selectively absorb light of a specified wavelength in the prior art.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the above-mentioned shortcoming, the deficiency of prior art, the utility model provides an optical device and augmented reality device that selective absorption and transmissivity are adjustable, it has solved the technical problem that augmented reality device among the prior art exists because of can not adjust the transmissivity of light and lead to the unable comfortable virtual image of obtaining of wearer and can not selective absorption appointed wavelength's light among the prior art makes the position of wearer expose easily.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
an embodiment of the utility model provides a selective absorption and transmittance adjustable optical device, include:
a first optical sheet assembly;
the front surface of the first optical sheet assembly is provided with at least one first type polarizer 24;
the first type polarizer 24 is a polarizer that is rotatable with respect to the first optical sheet assembly;
at least one second optical sheet component is selectively arranged on the reverse side of the first optical sheet component;
the first optical sheet assembly includes: a first polarizer 23, a first wave plate 22 and a second polarizer 21 which are arranged in parallel in sequence;
the first wave plate 22 is used for rotating the vibration direction of the light with the wavelength corresponding to the first wave plate in the light after the light is incident on the first wave plate 22;
each second optical sheet assembly comprises a second wave plate 42 and a third polaroid 41 which are sequentially arranged in parallel;
the second wave plate 42 is configured to rotate a vibration direction of the light with a wavelength corresponding to the second wave plate after the light enters the second wave plate.
Preferably, the first and second liquid crystal materials are,
in the first optical sheet assembly, an included angle between a transmission axis of the second polarizer 21 and an optical axis of the first wave plate 22 is 45 degrees;
the transmission axis of the first polarizer 23 and the transmission axis of the second polarizer 21 are at 90 ° or 180 °.
In a preferred embodiment of the method of the invention,
the first wave plate 22 rotates the vibration direction of the light with the first designated wavelength corresponding to the first wave plate by 90 ° after the light enters the first wave plate.
Preferably, the first and second liquid crystal materials are,
the optical axis of the second wave plate 42 in each second optical sheet assembly forms an angle of 45 degrees with the transmission axis of the third polarizer 41; and the transmission axis of the third polarizer (41) or the second polarizer 21 adjacent to the first side of each second wave plate 42 is 90 degrees or 180 degrees with respect to the transmission axis of the third polarizer 41 adjacent to the second side of the second wave plate 42.
Preferably, the first and second liquid crystal materials are,
each of the first waveplate 22 and the second waveplate 42 corresponds to light with different wavelengths.
Preferably, the first and second liquid crystal materials are,
the first wave plate 22 and the second wave plate 42 are both multi-stage wave plates.
Preferably, the first and second liquid crystal materials are,
each of the first and second waveplates 22 and 42 is of the same material and of different thickness.
On the other hand, the embodiment also provides an augmented reality device, which includes any one of the above optical devices with selective absorption and adjustable transmittance.
Preferably, the optical device with selective absorption and adjustable transmittance is arranged on the outward side of the optical combiner of the augmented reality device.
(III) advantageous effects
The utility model has the advantages that: the utility model discloses an optical device with selective absorption and adjustable transmittance and an augmented reality device, which is matched with a polaroid to realize the wavelength selective absorption function due to different phase delay amounts of different wavelengths; the transmittance is adjusted by adjusting the included angle of the transmission axis of the polaroid.
Drawings
FIG. 1 is a schematic diagram of a selective absorption and transmittance adjustable optical device according to the present invention;
fig. 2 is a schematic diagram of an optical device with selective absorption and adjustable transmittance according to an embodiment of the present invention;
FIG. 3 is a diagram showing transmittance and phase retardation of light passing through a 0.5mm quartz crystal disposed in the middle of a parallel polarizer according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a conventional augmented reality device.
[ description of reference ]
23: a first polarizing plate;
22: a first wave plate;
21: a second polarizing plate;
24: a first type polarizer;
42: a second wave plate;
41: a third polarizing plate.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1, the present embodiment provides a selectively absorbing and transmittance adjustable optical device, including:
a first optical sheet assembly.
The front side of the first optical sheet assembly is provided with at least one first type polarizer 24.
The first type polarizer 24 is a polarizer that is rotatable with respect to the first optical sheet assembly.
Referring to fig. 1 and 2, at least one second optical sheet assembly is selectively disposed on the opposite side of the first optical sheet assembly.
The first optical sheet assembly comprises: a first polarizer 23, a first wave plate 22 and a second polarizer 21 arranged in sequence and in parallel.
The first wave plate 22 is used for rotating the vibration direction of the light with the wavelength corresponding to the first wave plate in the light after the light is incident into the first wave plate 22.
Each of the second light sheet assemblies includes a second wave plate 42 and a third polarizer 41 which are sequentially arranged in parallel.
The second wave plate 42 is configured to rotate a vibration direction of the light with a wavelength corresponding to the second wave plate after the light enters the second wave plate.
In practical applications of this embodiment, in the first optical sheet assembly, an included angle between a transmission axis of the second polarizer 21 and an optical axis of the first wave plate 22 is 45 °.
The transmission axis of the first polarizer 23 and the transmission axis of the second polarizer 21 are at 90 ° or 180 °.
In practical applications of this embodiment, the first wave plate 22 realizes that after the light enters the first wave plate, the vibration direction of the light with the first specified wavelength corresponding to the first wave plate in the light is rotated by 90 °.
In practical application of this embodiment, the optical axis of the second wave plate 42 in each second optical sheet assembly is 45 ° to the transmission axis of the third polarizer 41; and, the transmission axis of the third polarizer 41 or the second polarizer 21 adjacent to the first side of each second wave plate 42 is 90 ° or 180 ° to the transmission axis of the third polarizer 41 adjacent to the second side of the second wave plate 42.
In a specific application, when the optical device is not provided with the second optical sheet assembly, the optical device is as shown in fig. 2, wherein if the phase retardation of the light with the wavelength corresponding to the first wave plate 22 is even times of pi, the phase retardation of the light with other wavelengths is not even times of pi or even odd times of pi/2 because the thickness of the first wave plate 22 is fixed; the included angle between the transmission axis of the second polarizer 21 and the optical axis of the wave plate 22 is 45 °, and when a light ray enters from the second polarizer 21 side:
1) When the included angle between the transmission axis of the first polarizer 23 and the transmission axis of the second polarizer 21 is 90 °:
the linearly polarized light having the vibration direction coincident with the transmission axis direction of the second polarizing plate 21 is converted by the second polarizing plate 21.
The light rays with even-numbered wave retardation of pi corresponding to the first wave plate 22 pass through the first wave plate 22, and then the vibration direction is unchanged, perpendicular to the transmission axis of the first polarizer 23, and cannot pass through the first polarizer 23.
Light rays having a wavelength phase retardation of an odd multiple of pi corresponding to the first wave plate 22 may pass through the first polarizer 23 with their vibration directions rotated by 90 ° after passing through the first wave plate 22, parallel to the transmission axis of the first polarizer 23.
2) When the transmission axes of the first polarizer 23 and the second polarizer 21 are parallel:
the linearly polarized light whose vibration direction coincides with the transmission axis direction of the second polarizing plate 21 is changed by the second polarizing plate 21.
The light rays having a phase retardation of a certain wavelength which is an even multiple of pi, pass through the first wave plate 22, and then pass through the first polarizer 23 in parallel with the transmission axis of the first polarizer 23 without changing the vibration direction.
The light rays having a wavelength phase retardation of an odd multiple of pi corresponding to the first wave plate 22 pass through the first wave plate 22, and then the vibration direction is rotated by 90 ° perpendicularly to the transmission axis of the first polarizer 23, and cannot pass through the first polarizer 23. Through the above steps, the optical device in the present embodiment can realize the performance of wavelength selective absorption.
In a particular application, when the optical device is not provided with the second optical sheet assembly, the optical device is shown in fig. 2, the first type polarizer 24 may be rotated with respect to the first polarizer 23; when a light ray is incident from the first-type polarizer 24 side, it first passes through the first-type polarizer 24 to become a vibration direction parallel to the transmission axis of the first-type polarizer 24; by rotating the first type polarizer 24, the angle of the vibration direction of the transmitted polarized light with respect to the first polarizer 23 can be adjusted: when the angle is 90 °, the light passing through the first type polarizer 24 cannot pass through the first polarizer 23; when the angle is 0 °, the light passing through the first type polarizer 24 passes through the first polarizer 23, and after passing through the first polarizer 23:
a) When the included angle between the transmission axis of the first polarizer 23 and the transmission axis of the second polarizer 21 is 90 °:
linearly polarized light having a vibration direction coincident with the transmission axis direction of the first polarizing plate 23 is converted by the first polarizing plate 23.
The light rays with even-numbered wave retardation of pi corresponding to the first wave plate 22 pass through the first wave plate 22, and then the vibration direction is unchanged, perpendicular to the transmission axis of the second polarizer 21, and cannot pass through the second polarizer 21.
Light rays having a wavelength phase retardation of an odd multiple of pi corresponding to the first wave plate 22 pass through the first wave plate 22 and then rotate 90 ° in the vibration direction, parallel to the transmission axis of the second polarizer 21, and pass through the second polarizer 21.
b) When the transmission axis of the polarizing plate 23 and the transmission axis of the polarizing plate 21 are parallel:
the linearly polarized light whose vibration direction coincides with the transmission axis direction of the first polarizing plate 23 is changed by the first polarizing plate 23.
The light rays corresponding to the first wave plate 22 having the even-numbered multiples of pi in the retardation of the wavelength phase, which pass through the first wave plate 22, pass through the first polarizer 23 without changing the vibration direction, parallel to the transmission axis of the first polarizer 23.
The light rays having a phase retardation of odd times pi for the wavelength corresponding to the first wave plate 22 pass through the first wave plate 22 and then rotate 90 ° in the vibration direction, perpendicular to the transmission axis of the second polarizer 21, and cannot pass through the polarizer 23. Thus, the optical transpose proposed in this embodiment can realize the adjustment of transmittance.
For example, when the transmission axes of the first polarizer 23 and the second polarizer 21 are parallel, the first wave plate 22 is a quartz crystal, and has a birefringence coefficient of about 0.00925 and a thickness of 0.5mm; as shown in fig. 3, the transmittance and the retardation of the light after passing through the second polarizer 21, the first wave plate 22 and the first polarizer 23 are such that the light with the retardation of an even multiple of pi (e.g., 510nm,9 λ =18 pi) can be completely transmitted and the light with the retardation of an odd multiple of pi (e.g., 540nm,17 λ/2=17 pi) cannot be transmitted, thereby realizing the wavelength selective absorption performance.
In order to achieve a wider wavelength absorption range or a better absorption effect in this embodiment, a plurality of wave plates and polarizing plates may be used, the wave plates and the polarizing plates are alternately arranged, and the phase retardation amounts of the wave plates for the same wavelength are different (wave plates of different materials or wave plates with different thicknesses are used). As shown in figure 1: the optical axes of the second polarizer 21, the first polarizer 23 and the third polarizer 41 are parallel, and the angle between the transmission axis of the third polarizer 41 and the optical axis of the second wave plate 42 is 45 °. The phase retardation of the first wave plate 22 is set to be an odd multiple of pi when passing through the first wave plate 22 by the wavelengths of the third polarizer 41, the second wave plate 42, and the second polarizer 21, and the vibration direction is rotated by 90 ° perpendicularly to the first polarizer 23 and is not transmitted therethrough, thereby increasing the absorption range of the wavelength.
In practical applications of the present embodiment, each of the first wave plate 22 and the second wave plate 42 corresponds to light with different wavelengths.
In practical applications of the present embodiment, the first wave plate 22 and the second wave plate 42 are both multi-stage wave plates.
In practical applications of the present embodiment, each of the first wave plate 22 and the second wave plate 42 is made of different materials.
In practical applications of the present embodiment, each of the first wave plate 22 and the second wave plate 42 has the same material and different thickness.
In the optical device with selective absorption and adjustable transmittance and the augmented reality device, the optical device adopts different phase retardation amounts for different wavelengths, and is matched with the polaroid to realize the wavelength selective absorption function; the transmittance is adjusted by adjusting the included angle of the transmission axis of the polaroid.
The embodiment also provides an augmented reality device, which comprises any one of the above optical devices with selective absorption and adjustable transmittance.
In a specific embodiment, the optical device with selective absorption and adjustable transmittance is arranged on the outward side of the light combiner of the augmented reality device. To prevent light emitted outward from the light combiner from being viewed by a person.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that modifications, alterations, substitutions and variations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (9)
1. A selectively absorptive and transmittance-tunable optical device, comprising:
a first optical sheet assembly;
the front surface of the first optical sheet assembly is provided with at least one first type polarizer (24);
the first type polarizer (24) is a polarizer rotatable with respect to the first optical sheet assembly;
the reverse side of the first optical sheet component is selectively provided with at least one second optical sheet component;
the first optical sheet assembly comprises: a first polarizer (23), a first wave plate (22) and a second polarizer (21) which are arranged in sequence and in parallel;
the first wave plate (22) is used for rotating the vibration direction of the light with the wavelength corresponding to the first wave plate in the light after the light is emitted into the first wave plate (22);
each second optical sheet assembly comprises a second wave plate (42) and a third polaroid (41) which are sequentially arranged in parallel;
the second wave plate (42) is used for rotating the vibration direction of the light with the wavelength corresponding to the second wave plate in the light after the light is incident into the second wave plate.
2. The optical device of claim 1,
in the first optical sheet assembly, an included angle between a transmission axis of the second polarizer (21) and an optical axis of the first wave plate (22) is 45 degrees;
the transmission axis of the first polarizer (23) and the transmission axis of the second polarizer (21) are at 90 DEG or 180 deg.
3. The optical device according to claim 2,
the first wave plate (22) rotates the vibration direction of the light with the first specified wavelength corresponding to the first wave plate by 90 degrees after the light enters the first wave plate.
4. The optical device according to claim 3,
the optical axis of the second wave plate (42) in each second optical sheet assembly and the transmission axis of the third polarizer (41) form an angle of 45 degrees; and the transmission axis of the third polarizer (41) or the second polarizer (21) adjacent to the first side of each second wave plate (42) is 90 degrees or 180 degrees with the transmission axis of the third polarizer (41) adjacent to the second side of the second wave plate (42).
5. The optical device according to claim 4,
each of the first wave plate (22) and the second wave plate (42) respectively corresponds to light rays with different wavelengths one by one.
6. The optical device according to claim 5,
the first wave plate (22) and the second wave plate (42) are both multi-stage wave plates.
7. The optical device according to claim 6,
each of the first waveplate (22) and the second waveplate (42) is of the same material and of different thickness.
8. An augmented reality device comprising the selectively absorbing and tunable transmittance optical device of any one of claims 1-7.
9. The augmented reality device of claim 8, wherein the selectively absorbing and transmittance-adjustable optical device is disposed on an outward-facing side of a light combiner of the augmented reality device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122467343.7U CN218630356U (en) | 2021-10-13 | 2021-10-13 | Selective absorption and transmittance-adjustable optical device and augmented reality device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122467343.7U CN218630356U (en) | 2021-10-13 | 2021-10-13 | Selective absorption and transmittance-adjustable optical device and augmented reality device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218630356U true CN218630356U (en) | 2023-03-14 |
Family
ID=85422102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122467343.7U Active CN218630356U (en) | 2021-10-13 | 2021-10-13 | Selective absorption and transmittance-adjustable optical device and augmented reality device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218630356U (en) |
-
2021
- 2021-10-13 CN CN202122467343.7U patent/CN218630356U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7418706B2 (en) | Augmented reality device and optical system therefor | |
| US20220179221A1 (en) | Substrate-guide optical device | |
| RU2324960C2 (en) | Light-conducting optical element | |
| US6693749B2 (en) | Low-observability, wide-field-of-view, situation awareness viewing device | |
| EP0718645B1 (en) | Optical device and head-mounted display using said optical device | |
| CN111443491A (en) | Optical display system, control method and display device | |
| JPH02132411A (en) | Optical combiner collimator apparatus | |
| CN111025659A (en) | Augmented reality optical module and augmented reality equipment | |
| CN214751111U (en) | Ultra-short distance ocular lens system | |
| CN205539752U (en) | Short distance optical enlargement module and subassembly thereof | |
| CN108572457A (en) | A kind of optical presentation system | |
| CN218630356U (en) | Selective absorption and transmittance-adjustable optical device and augmented reality device | |
| CN216248599U (en) | Augmented reality display system and AR glasses | |
| AU2007203023B2 (en) | A Light Guide Optical Device | |
| CN113848649A (en) | Selective absorption and transmittance-adjustable optical device and augmented reality device | |
| CN116243483A (en) | Augmented reality display system and AR glasses | |
| CN220855351U (en) | AR/VR dual-mode display system and device | |
| CN214151259U (en) | Optical imaging system and head-mounted display device | |
| KR102595351B1 (en) | Thin, flat and wide -FOV near-eye displaying apparatus and method | |
| CN112925102A (en) | Optical imaging system and head-mounted display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |