Method for recognizing laser light spots, method and system for automatic focusing of laser projector

A technology of laser projector and identification method, applied in optics, instruments, and optical devices, etc., can solve problems such as inaccuracy, achieve high accuracy, and avoid the effect of laser emission power

Active Publication Date: 2017-05-31
SHENZHEN ORBBEC CO LTD
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Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a laser spot identification method and a laser projector automatic focusing method and system, which can accurately identify the spot and automatically focus the laser projector, effectively solving the problem of manual focusing or mechanical focusing. The problem of inaccurate precision caused by focusing

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  • Method for recognizing laser light spots, method and system for automatic focusing of laser projector
  • Method for recognizing laser light spots, method and system for automatic focusing of laser projector
  • Method for recognizing laser light spots, method and system for automatic focusing of laser projector

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[0019] The present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following descriptions are only exemplary and not intended to limit the scope of the present invention and its application.

[0020] Such as figure 1 As shown, the present invention provides an automatic focusing method of a laser projector, comprising the following steps:

[0021] S1: The laser projector projects at least one light beam into the space;

[0022] S2: the collection module collects the spot image of the light beam in real time;

[0023] S3: The recognition module performs laser spot recognition according to the second derivative of the spot intensity distribution.

[0024] S4: The calculation module calculates the parameter value of the sharpness of the spot image in real time;

[0025] S5: The focusing module continuously adjusts the relative position of the light sou...

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Abstract

The invention discloses a method and system for automatic focusing of a laser projector. The method includes S1, the laser projector projecting at least one light beam into space; S2, a collecting module collecting light spot images in real time; S3, a recognizing module recognizing the laser light spots according to second derivative of distribution of the light spot strength; S4, a computation module computing parameter values of definition of the light spot images; S5, a focusing module focusing relative relation of a light source constantly and repeating the step 1-4; S5, the focusing module comparing the parameter values acquired in real time to acquire the optimum parameter value, and focusing the light source to the optimum position according to the optimum parameter value. With the method and the system, automatic focusing of the laser projector can be realized, the problem of low precision brought by manual focusing in the prior art is solved, and meanwhile, focusing efficiency is greatly improved.

Description

technical field [0001] The invention relates to the fields of optical technology and computer technology, in particular to a method and system for laser spot recognition and automatic focusing of a laser projector. Background technique [0002] Laser projectors are often used in optical measurement, especially the generation and wide application of depth cameras based on structured light at present, which has prompted the continuous development of laser projectors as one of its components. Generally, a laser projector is composed of a light source and optical components composed of lenses. Most of the current laser projectors use a single edge-emitting laser light source. With the continuous development of lasers, vertical cavity surface lasers due to their divergence angle The advantages of small size, low power consumption and cost, small size and easy integration will be adopted by more and more laser projectors. [0003] During the assembly process of the laser projecto...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25G01B11/00G03B21/53
CPCG01B11/00G01B11/25G03B21/53
Inventor 黄源浩许星杨子荣
Owner SHENZHEN ORBBEC CO LTD
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