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Optical machine module based on colored double-layer grating waveguide sheet

A grating waveguide and optical-mechanical module technology, applied in the directions of light guides, optics, optical components, etc., can solve the problems of decreased light intensity, sacrifice of color uniformity, etc., and achieve the effect of reducing blocking, maximizing diffraction efficiency, and uniform intensity distribution

Inactive Publication Date: 2021-06-22
SHENZHEN LOCHN OPTICS HI-TECH CO LTD
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  • Summary
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  • Claims
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Problems solved by technology

This optical-mechanical design method effectively reduces the volume of the lighting module, but the intensity of light emitted from the lighting waveguide will be greatly reduced, and the color uniformity will also be sacrificed

Method used

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  • Optical machine module based on colored double-layer grating waveguide sheet
  • Optical machine module based on colored double-layer grating waveguide sheet
  • Optical machine module based on colored double-layer grating waveguide sheet

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specific Embodiment

[0043] In the present embodiment, the grating selects a sparkle grating structure, coupled out of the grating, a cylindrical grating structure, a hexagonal distribution, red, blue, and green light is 617 nm, 460 nm, 525 nm, respectively. According to the waveguide design theory, one embodiment is obtained, as shown in the following table.

[0044]Table 1 Design parameters of blue, green light waveguide

[0045] Coupled grating cycle 410nm Coupled area diameter 2mm Coupled grating height 300nm Coupling area size 5.8928 × 4.4196mm Coupled raster cycle 810nm Coupled raster height 300nm Coupled raster diameter 210nm Substrate thickness 0.4mm Basal material H-K9

[0046] Table 2 Design parameters of red light wave

[0047]

[0048]

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Abstract

The invention discloses an optical machine module based on a colored double-layer grating waveguide sheet. The optical machine module comprises an LED lamp, a Fresnel lens, the colored double-layer grating waveguide sheet, a PBS device and a reflective image source chip, wherein the substrate thickness of the grating waveguide sheet is controllable, the light path is foldable, the size of the illumination light path can be controlled, and blocking during wearing is reduced. Meanwhile, the light of the LED can be modulated by changing the grating structure of the double-layer waveguide, so that the +1-order diffraction efficiency of the required wavelength is maximized, and the intensity distribution is uniform.

Description

Technical field [0001] The present invention relates to the field of illumination devices, and in particular, to an optical machine module based on a color double-layer grating waveguide. Background technique [0002] Augment Reality, AR is a technology that projections the real world information and virtual world information to the human eye after superimposing the transparent or translucent display device, and combines the related algorithm to achieve the desired function. Since AR technology enhances the output of real environment information, it has a wide range of applications in military, three-dimensional modeling, real-time tracking, medical technology. At present, there are two main design directions of transmission AR products in the market, one is the geometric optical waveguide direction, one is the direction of the diffraction light waveguide. The geometric optical waveguide is mainly transmitted to the human eye through the array of mirrors to propagate light to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01G02B6/124
CPCG02B27/0172G02B6/124
Inventor 邹小慧宋强郭晓明黄浩马国斌汪涛
Owner SHENZHEN LOCHN OPTICS HI-TECH CO LTD
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