Method, optical system and wearable equipment for color visual display by means of holographic waveguide

A holographic waveguide and optical system technology, applied in the field of optical equipment for display, can solve the problems of loss of image information, unable to complete color image output from a single color image source, etc. Effect

Inactive Publication Date: 2015-04-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent application with publication number CN102928981A discloses a holographic optical waveguide head-mounted display optical system, which includes a relay collimation optical system, a holographic optical waveguide component, and a display image source. Users can see the image coupled out of the holographic optical waveguide for projection. The method is superimposed on the external scene; although this technology solves the problem of off-axis transmission of the optical path and reduces the weight and volume of the system, but only a single color image source cannot complete the output of color images, thus losing image information

Method used

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  • Method, optical system and wearable equipment for color visual display by means of holographic waveguide
  • Method, optical system and wearable equipment for color visual display by means of holographic waveguide
  • Method, optical system and wearable equipment for color visual display by means of holographic waveguide

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Embodiment 1

[0047] Such as figure 1 and Figure 4 As shown, along the direction of light propagation, the holographic waveguide color visual display system sequentially includes a red LD light source, an LCOS image source, a collimator lens optical train 1, a green LD light source, an LCOS image source, and a collimator lens optical train 2 , blue LD light source, LCOS image source, collimating lens optical train 3, the prism 4 (or holographic grating 16) that couples red light into the holographic waveguide, and the prism 5 (or holographic grating 17) that couples green light into the holographic waveguide , the prism 6 (or holographic grating 18) that couples the blue light into the holographic waveguide, the holographic waveguide element 7 that is used to expand the exit pupil and realize the penetration display, and the holographic grating 8 that guides the light out of the holographic waveguide element 7, and finally the human eye 9 is used to accept the image light signal of the ho...

Embodiment 2

[0049] Such as figure 2 As shown, along the direction of light propagation, the holographic waveguide for color visual display system sequentially includes a red, green and blue three-color LD light source, an LCOS image source 10, a convex lens 11 for generating parallel light, and a prism 12 for coupling light into the holographic waveguide. , the holographic waveguide original 7 used to expand the exit pupil and realize the penetrating display, the holographic grating 8 that guides the light out of the holographic waveguide original 7, and finally the human eye 9 is used to accept the image light signal of the holographic waveguide of the present invention for color visual display system . Specifically, one LCOS image source is used for output after being illuminated by the LD light source 10 , and the light emitted by each is coupled into the holographic waveguide element 7 through the prism 12 . The light is transmitted forward through multiple total reflections in the ...

Embodiment 3

[0051] Such as image 3 and Figure 5As shown, along the direction of light propagation, the holographic waveguide for color visual display system sequentially includes a red LD light source, an LCOS image source, a collimator lens optical train 1, a green and blue two-color LD light source, and an LCOS image source 13 for generating Convex lens 14 for parallel light, prism 4 (or holographic grating 16) that couples red light into the holographic waveguide, prism 15 that couples green and blue dichroic light into the holographic waveguide, used to expand the exit pupil and realize the holographic waveguide that penetrates the display The original 7 is the holographic grating 8 that guides light out of the holographic waveguide original 7, and finally the human eye 9 is used to receive the image light signal of the holographic waveguide of the present invention for color visual display system. Specifically, the red LD light source, LCOS image source, collimating lens optical t...

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PUM

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Abstract

The invention discloses a method for color visual display by means of a holographic waveguide. At least two beams of light rays different in color are adopted for illuminating corresponding LCOS image sources, light rays carrying image information are coupled into the holographic waveguide to be subjected to total reflection transmission, the light rays carrying image information are emitted at the same angle to form color output, after light rays of real scene images penetrate through the holographic waveguide, images are formed on human eye retinas, and output image information and real scenes are overlaid. The invention further discloses an optical system and wearable equipment for color visual display by means of the holographic waveguide. Through the holographic waveguide technology, exit pupil extension can be achieved, human eyes can have a large activity range, color display can be achieved by adjusting incident angles of different light sources, and image information is more complete.

Description

technical field [0001] The invention relates to the field of display optical equipment, in particular to a method for color visual display using a holographic waveguide, an optical system and a wearable device. Background technique [0002] With the rapid development of the information society, head-mounted display technology has shown great application value and development potential in many fields, and penetrating head-mounted display technology has always been the focus of research. Head-mounted display (HMD) is an image display device, which can be used in military applications, industrial production, simulation training, microscopic technology, medical instruments, game entertainment and other fields. The helmet-mounted display can integrate the external scene with the data of the display, so that people can learn important information without turning their heads to look up, which is of great significance for obtaining information in a convenient and timely manner. [...

Claims

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Application Information

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IPC IPC(8): G02B27/01G02B27/00G02B6/122
CPCG02B27/0101G02B6/122G02B2027/0112G02B2027/0178
Inventor 郑臻荣刘思奇袁飞陈安秋张海裕朱林靖常胜倩刘静李海峰刘旭
Owner ZHEJIANG UNIV
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