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Structured light projection module group, depth camera and method for manufacturing structured light projection module group

A technology of structured light projection and module, applied in optics, optical components, components of TV systems, etc., can solve problems such as reducing the uniformity of speckle patterns, and achieve the effect of high-precision three-dimensional measurement and high irrelevance

Inactive Publication Date: 2018-03-02
SHENZHEN ORBBEC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to improve the calculation accuracy, that is, to ensure uniform spot density distribution, the arrangement of VCSEL array chips and the randomness of sub-spot patterns will reduce the uniformity of the final projected spot pattern

Method used

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  • Structured light projection module group, depth camera and method for manufacturing structured light projection module group
  • Structured light projection module group, depth camera and method for manufacturing structured light projection module group
  • Structured light projection module group, depth camera and method for manufacturing structured light projection module group

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Embodiment Construction

[0041] Embodiments of the present application will be described in detail below. It should be emphasized that the following description is exemplary only and not intended to limit the scope of the application and its application.

[0042] figure 1It is a schematic diagram of a depth camera based on structured light technology. The depth camera includes a structured light projection module 11 and an acquisition module 12. The structured light projection module is used to project structured light patterns into the spatial projection area A, and the acquisition module is used to acquire structured light images on objects in its acquisition area B , generally the projection area A is not lower than the collection area B, so as to ensure that the objects in the collection area corresponding to the collection module can be covered by the structured light pattern. In addition, the depth camera also includes a processor for receiving the structured light image collected by the colle...

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Abstract

The invention discloses a structured light projection module group, a depth camera and a method for manufacturing the structured light projection module group. The structured light projection module group comprises a light source which comprises multiple child light sources which are arranged into a two-dimensional array and used for transmitting two-dimensional patterned beams corresponding to the two-dimensional array; a lens which receives and converges the two-dimensional patterned beams; and a diffractive optical element which receives the two-dimensional patterned beams which are emergent through convergence of the lens and projects speckle patterned beams, wherein the speckle patterns include multiple image patterns corresponding to the two-dimensional patterns, and the relationshipbetween the adjacent image patterns of multiple image patterns at least includes two relationship of overlapping, adjoining and spacing. The structured light projection module group can project the speckle patterns having high degree of non-correlation.

Description

technical field [0001] The present application relates to a structured light projection module, a depth camera and a method for manufacturing the structured light projection module. Background technique [0002] 3D imaging technology is the core of the new generation of human-computer interaction technology. With the rigid demand of mobile terminal equipment for 3D imaging technology, depth cameras will be widely used in mobile terminal equipment, which also makes depth cameras move towards low power consumption. , high performance, and small volume. The structured light projection module is the core device in the depth camera based on structured light technology, and its main components are light source and diffractive optical element (DOE). Diffractive Optical Elements (DOE) have the function of modulating light beams, such as splitting incident light beams to generate outgoing light beams with specific structured patterns. A typical solution is to use a laser emitter to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20
CPCG03B21/2013G03B21/2033G03B21/20G01C3/08G02B27/48H04N23/56H04N13/254G02B27/4233
Inventor 黄源浩王兆民闫敏许星
Owner SHENZHEN ORBBEC CO LTD
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