Speckle structure light projection module group and 3D depth camera

A technology of structured light projection and module, which is applied in the fields of optomechanical equipment, optics, photography, etc., and can solve the problems of stray background light, less work, production efficiency, ghost line interference, etc.

Active Publication Date: 2018-12-07
BEIJING HUAJIE IMI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a speckle structured light projection module and a 3D depth camera to solve the problem caused by the DOE design based on the etching process in the speckle structured light projection module in the prior art. Line interference, less stray background light and low production efficiency

Method used

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  • Speckle structure light projection module group and 3D depth camera
  • Speckle structure light projection module group and 3D depth camera
  • Speckle structure light projection module group and 3D depth camera

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Embodiment Construction

[0014] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0015] Such as figure 1 As shown, the speckle structured light projection module according to an embodiment of the present invention includes: an array light source 11 for emitting a laser beam corresponding to the first speckle pattern; a collimator lens 13 for modulating the laser beam to correspond to The collimated light beam of the first speckle pattern; Holographic Optical Element (Holographic Optical Element, HOE) 14, is used to modulate and expand the collimated light beam to form a second speckle pattern, and project the second speckle pattern to the scene object 15 to be...

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Abstract

The invention relates to the field of 3D topography measurement. An embodiment of the invention provides a speckle structure light projection module group and a 3D depth camera, wherein the speckle structure light projection module group comprises: an array light source for emitting a laser beam corresponding to a first spot pattern, a collimating lens for modulating the laser beam into a collimated beam corresponding to the first spot pattern, and a holographic optical element for modulating and expanding the collimated beam to form a second spot pattern and projecting the second spot patternto a scene object to be tested; the holographic optical element is produced via laser interference exposure processing. Thus, the holographic optical element processed via the laser interference exposure processing is used, ghost line interference problems can be prevented, and stray background light is reduced; in addition, laser interference processing can be more efficient and less expensive than etching processing.

Description

technical field [0001] The invention relates to the field of 3D shape measurement, in particular to a speckle structured light projection module and a 3D depth camera. Background technique [0002] 3D shape measurement technology can collect the depth coordinate information of objects in the scene, providing additional data processing freedom for back-end development. With the popularity of mobile terminal devices and intelligent interactive devices, 3D measurement technology has increasingly become the core technology of the new generation of human-computer interaction, and has a wide range of applications in industrial inspection, security retail, somatosensory games, mobile payment, and biomedicine. prospect. [0003] The current 3D shape measurement technologies are mainly divided into three types: Time of Flight (TOF), Binocular Parallax (BP) and Structure Light (SL). The TOF solution obtains the depth information of the object by measuring the time delay between lase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B15/02G02B5/32G03F7/00
CPCG03B15/02G03F7/0005G02B5/32
Inventor 高乾坤盛赞郑少林李骊王行周晓军杨淼李朔
Owner BEIJING HUAJIE IMI TECH CO LTD
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