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Color structure light projection device

A structured light projection and structured light technology, applied in the field of projection display, can solve problems such as stroboscopic effect, and achieve the effect of eliminating stroboscopic effect, strong stability and small size

Inactive Publication Date: 2019-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the defects of the prior art, the object of the present invention is to provide a color structured light projection device, aiming to solve the problem of stroboscopic effect existing in the existing color structured light projection device

Method used

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] like figure 1 As shown, the present invention provides a color structured light projection device, comprising: a first monochromatic light source 1, a second monochromatic light source 6, a third monochromatic light source 9, a first dodging sheet 2, a second dodging sheet 5. The third dodging sheet 8, the first grating 3, the second grating 4, the third grating 7, the combining prism 10 and the projection lens 11;

[0040] Place the first grating 3, the first homogenizing sheet 2 and the first monochromatic light source 1 in sequence in front of the light combining prism 10; the front side...

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Abstract

The invention discloses a color structure light projection device, and belongs to the field of projection display. The projection device comprises a first single-color light source, a second single-color light source and a third single-color light source, wherein the first single-color light source is subjected to light homogenization by a first light homogenization sheet and forms uniform illumination distribution on a first grating; the second single-color light source is subjected to light homogenization by a second light homogenization sheet and forms uniform illumination distribution on asecond grating; the third single-color light source is subjected to light homogenization by a third light homogenization sheet and forms uniform illumination distribution on a third grating; the first grating, the second grating and the third grating are located on three side surfaces of a light combination prism, and are mechanical transmission gratings; distances of the gratings and the corresponding side surfaces of the light combination prism are equal; and a projection lens simultaneously projects images of the first grating, the second grating and the third grating to a to-be-measured three-dimensional object. Relative positions of the mechanical transmission gratings adopted by the projection device are adjustable; a stroboscopic effect can be completely eliminated; and the single-color light sources can adopt different color combination to form different color structure light. Therefore, the color structure light projection device is wide in application demand.

Description

technical field [0001] The invention belongs to the field of projection display, and more specifically relates to a color structured light projection device. Background technique [0002] It is well known that color images can provide more information than monochrome grayscale images. In the field of non-contact 3D profile measurement, using phase demodulated color structured light to project onto the surface of a 3D object, multiple images of grayscale information can be separated from one frame of color image to achieve rapid measurement of the profile of a 3D object. At present, the main means of realizing color structured light projection is to use digital projection technology, including DLP (Digital Light Processing) projection, LCOS (Liquid Crystal on Silicon) projection and LCD (Liquid Crystal Display) projection, etc. Common projection equipment is commercial projector. Due to the large size of the digital projector, it is not suitable for mobile and hand-held thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20H04N9/31
CPCG03B21/2013G03B21/206H04N9/3141H04N9/3164
Inventor 马冬林朱正波丁传厚
Owner HUAZHONG UNIV OF SCI & TECH
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