Structure light projection module, depth camera and method for manufacturing the structure light projection module
A structured light projection and module technology, applied in optics, instruments, projection devices, etc., can solve the problem of reducing the uniformity of spot patterns, etc., and achieve the effect of three-dimensional measurement, high-precision three-dimensional measurement, and high irrelevance
Pending Publication Date: 2018-04-13
SHENZHEN ORBBEC CO LTD
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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
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[0043] 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.
[0044]figure 1 It 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 collec...
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The invention discloses a structure light projection module, a depth camera and a method for manufacturing the structure light projection module. The structure light projection module comprises a light source comprising a plurality of sub-light sources arranged in a two-dimensional array and used for emitting a two-dimensional patterned light beam corresponding to the two-dimensional array; a lensused for receiving and converging the two-dimensional patterned light beam; and a diffraction optical element used for receiving the two-dimensional patterned light beam which is emitted after beingconverged by the lens, and projecting a spot patterned light beam. The spot pattern includes a plurality of image patterns corresponding to the two-dimensional pattern, and the plurality of image patterns are in an interval state. According to the structure light projection module, the spot pattern with higher non-correlation degree can be projected.
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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Login to View More IPC IPC(8): G03B21/20
CPCG03B21/2013G03B21/206
Inventor 黄源浩王兆民闫敏许星
Owner SHENZHEN ORBBEC CO LTD