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Optical device, system and optical apparatus

A technology of optical devices and optical systems, applied in optical components, optics, instruments, etc., can solve the problems of poor system flexibility, difficulty in realizing light field display, and can not replace lens/reflector light compression or expansion, etc., and achieve volume reduction. Effect

Pending Publication Date: 2021-04-20
SHANGHAI INTELIGHT ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing technologies are often realized by waveguide systems (such as diffractive waveguides, arrayed waveguides, etc.), but the above-mentioned waveguides themselves only have the ability to expand pupils, and cannot replace optical devices such as lenses / mirrors to achieve modulation such as compression or expansion of light function, and the incident light must be parallel light, there are problems such as poor system flexibility, and it is difficult to realize light field display. In addition, due to the multiple transmission and reflection of light on the grating or array surface (pupil expansion), the utilization rate of light is low. It often cannot meet the needs of use in bright environments

Method used

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  • Optical device, system and optical apparatus
  • Optical device, system and optical apparatus
  • Optical device, system and optical apparatus

Examples

Experimental program
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Embodiment 1

[0048] Such as Figure 1a , 1b , 1c, the present embodiment is used as a combiner in an augmented reality display system, and is composed of two Fresnel lenses with tooth surfaces fitted (gluing or bonding for the convenience of production, the Fresnel lenses The teeth can be of equal height, and the size of each tooth can be between 10 and 30 microns. The teeth here can be a single tooth, or a row or column of teeth in a one-dimensional direction, or teeth with the same center. Ring or belt, or a combination of the above forms), the optical parameters corresponding to each tooth can be designed independently (for example, the curvature corresponding to each tooth is different), and one Fresnel lens fits with the other Fresnel lens The surface is coated with an angle-selective AR coating. One side of one of the Fresnel lenses is glued with a dielectric waveguide, the refractive index of which is the same as or close to that of the Fresnel lens. Incidence from one side of the...

Embodiment 2

[0057] Such as Figure 7 As shown, another combiner in an augmented reality display system is made of two sheets with matching structures on each side surface (it can be a structure with a certain diopter designed off-axis, or a periodically repeated microstructure ) optical device, wherein the surface of one device and the other device is coated with a polarization-selective anti-reflection film. The image light is linearly polarized light (for example, the pixel uses an LCOS device, and the image light is P light relative to the tooth surface of the Fresnel lens), incident from one side of a device, when it enters the interface of two devices, it is completely reflective (or partially reflective in some embodiments, such as 50% reflective). Ambient light is incident from one side of another device, and when it is incident on the interface of two devices, the S component with the polarization direction is completely transmitted (or it can be mostly transmitted, such as 95%),...

Embodiment 3

[0062] Such as Figure 8 As shown in , another combiner in an augmented reality display system is composed of two optical devices with matching tooth-shaped structures prepared on each side surface. The image light is incident from a surface of a piece of structure at a certain angle range, and then reaches its tooth-shaped surface after passing through the structure. For light rays, these tooth-shaped structures are equivalent to mirrors with certain optical parameters (radius of curvature, conic coefficient, high-order terms of aspheric surfaces, etc.). The surface opposite to the incident direction of the image light is coated with an anti-reflection coating (if the refractive index of the two devices is close to or the same, the anti-reflection coating may not be coated), the external ambient light is incident from another device, and passes through the other device. When a piece of device reaches the interface, the light incident on the surface coated with anti-reflectio...

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Abstract

The invention provides an optical device, a system and an optical apparatus, the optical device is composed of a plurality of parts, light rays satisfying a predetermined characteristic propagate on an interface of the plurality of parts in one manner, and light rays not satisfying the predetermined characteristic propagate on the interface in another manner. According to the invention, at least part of parts with matched tooth surfaces are adopted, and the ambient light is equivalent to transmitting a flat medium and is not influenced by the parts to change the focal power. And the image light is equivalently reflected by a reflector with focal power after being reflected by the tooth-shaped structure of one part, so that the focal power of the image light is changed.

Description

technical field [0001] The present invention relates to the field of optical devices, in particular to an optical device, a system and an optical device. Background technique [0002] In some optical applications such as AR display and transparent display, it is necessary to combine light rays, and the corresponding combined image light often needs to be modulated (such as compression or expansion, focusing, etc.), and often requires optical devices (such as lenses) The modulated light travels a certain distance, so that the entire optical system must occupy a certain amount of space. In some volume-sensitive applications, such as head-mounted AR / VR systems, mobile phones, and camera lenses for wearable devices, it is a design challenge to compress the volume of the optical system and improve light efficiency. [0003] Just as the patent document "Diffraction waveguide capable of pupil expansion and uniform light output" (CN111123524A), waveguide substrate, incident grating...

Claims

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Application Information

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IPC IPC(8): G02B5/124G02B27/28G02B27/01
CPCG02B27/01G02B27/28G02B5/124
Inventor 谈顺毅陈理军
Owner SHANGHAI INTELIGHT ELECTRONICS TECH CO LTD
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