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Optical projection module having security monitoring function

An optical projection and module technology, which is applied in optics, image reproducers using projection devices, and components of color TVs, and can solve problems such as laser safety issues.

Inactive Publication Date: 2018-05-04
SHENZHEN ORBBEC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the laser safety problem that may occur during the use of the optical projection module, the present invention provides an optical projection module and its safety control method

Method used

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  • Optical projection module having security monitoring function
  • Optical projection module having security monitoring function
  • Optical projection module having security monitoring function

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Embodiment Construction

[0017] The present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings, so as to better understand the present invention, but the following embodiments do not limit the scope of the present invention. In addition, it should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and only the components related to the present invention are shown in the drawings rather than the number of components, Shape and size drawing, the shape, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the layout of the components may also be more complex.

[0018] figure 1 is a schematic structural diagram of an optical projection module according to an embodiment of the present invention. The optical projection module in this embodiment includes a base 10 , a light source 11 , a lens barrel...

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Abstract

The invention provides an optical projection module having a security monitoring function. The optical projection module includes a light source for emitting a light beam, a lens system for receivingthe light beam emitted by the light source to project a parallel light beam, a diffraction optical element for receiving and splitting the parallel light beam to project a patterned light beam, a transparent substrate and a control circuit, wherein a transparent conductive film is attached to the surface of the transparent substrate, and the transparent substrate is fixed on the upper portion of the diffraction optical element; the control circuit is electrically connected with the transparent conductive film, and evaluates and judges the integrity of the transparent substrate and controls a light emitting state of the light source through monitoring changes of the transparent conductive film. The optical projection module has higher laser safety performance.

Description

technical field [0001] The invention relates to the fields of optics and optoelectronics, in particular to an optical projection module and a safety control method thereof. technical background [0002] Optical projection modules that project coded or structured beams are widely used in 3D scanning of objects, 3D reconstruction of space, human-computer interaction and other fields. The optical projection module performs spatial calibration on the target object by projecting coded or structured beams, and provides preparations for the information collection of the later image acquisition module and the 3D reconstruction of the processor. [0003] An optical projection module for projecting coded or structured beams generally includes a light source and a diffractive optical element (DOE). Among them, the DOE is used to receive the beam emitted by the light source, and generate a patterned beam in a beam splitting and superposition manner. The so-called patterned beam is act...

Claims

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Application Information

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IPC IPC(8): G03B21/20G03B21/14H04N9/31
CPCG03B21/14G03B21/20G03B21/2086H04N9/3191
Inventor 王兆民闫敏邓想全
Owner SHENZHEN ORBBEC CO LTD
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