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Structured light projector

A projector and structured light technology, which is applied in optics, instruments, optical components, etc., can solve the problems of difficulty in miniaturization and high cost of structured light projectors

Active Publication Date: 2018-10-12
SHENZHEN GUANGJIAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional microlenses are made of glass materials with a certain curved shape, however, the alignment of such microlenses is very challenging and expensive
In addition, the placement of complex microlenses also makes the miniaturization of structured light projectors very difficult

Method used

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Embodiment Construction

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Please refer to Figure 1-6 , figure 1 It is a structural schematic diagram of a structured light projector provided by the present invention; figure 2 It is a schematic diagram of the first arrangement of each grating strip when the grating strip is a straight strip structure; image 3 yes figure 2 The phase distribution diagram corresponding to each grating bar in ; Figure 4 It is a schematic diagram of the second arrangement of each grating strip when the grating strip is a straight strip structure; Figure 5 is a structural schematic diagram of a grating lens provided with two layers of grating strips; Image 6 It is a schematic diagram of the structure of the grating lens when the grating strip is a ri...

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Abstract

The invention relates to a structured light projector. The projector comprises a random lattice light source and multiple grating lenses arranged on light outlet sides of the random lattice light source, and each grating lens corresponds to each light outlet spot of the random lattice light source one by one; the grating lenses comprise substrates and multiple grating strips arranged on the surfaces of the substrates at intervals, the refractivity of the grating strips is greater than that of the substrates, wherein the grating strips can be of straight strip structures or annular structures.Len alignment during the assembly process is conveniently achieved by means of the structured light projector, and miniaturization of the whole structure is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of depth sensing equipment, in particular to a structured light projector. Background technique [0002] In recent years, with the continuous development of the consumer electronics industry, the 3D camera with depth sensing function has been paid more and more attention by the consumer electronics industry. At present, the relatively mature depth measurement method is the structured light scheme, which projects a specific structured light pattern on the object, and then calculates the depth of different positions of the object through the deformation or displacement of the pattern. [0003] A relatively common structured light pattern is a random dot matrix. The density of the dots in the random dot matrix determines the resolution of the generated depth map. Therefore, the smaller the size of each light dot, the greater the density of the light dots, and the generated depth The higher the resolution of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/42
CPCG02B27/4205
Inventor 吕方璐
Owner SHENZHEN GUANGJIAN TECH CO LTD
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