Laser projection device and safety control method thereof
A technology of laser projection and safety control, which is applied in the fields of optics and optoelectronics, can solve laser safety problems and other problems, and achieve the effect of improving laser safety performance
Inactive Publication Date: 2018-01-19
SHENZHEN ORBBEC CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to propose a laser projection device and its safety control method in order to solve the laser safety problem that occurs during the use of the laser projection device in the prior art
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[0021] 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 complicated.
[0022] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", "left", "right" etc. The orientation or positional relationship is only for the ...
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The invention provides a laser projection device which comprises a light source used for emitting light beams; a collimating lens used for converging the light beams emitted by the light source and projecting parallel light beams; a diffractive optical element (DOE ) used for receiving and splitting the parallel light beams, and projecting the patterned light beams; a transparent conducting thin film which is attached to the surface(s) of the collimating lens and / or the diffractive optical element and has a resistance attribute; a monitoring and controlling unit which is electrically connectedwith the transparent conducting thin film and is used for monitoring voltage / current / resistance signals between the transparent conducting thin films in real time, indirectly judging the integrity ofthe collimating lens and / or the DOE and carrying out the corresponding safety control. The invention further provides a safety control method of the laser projection device. According to the laser projection device and the safety control method thereof, the laser safety performance of the laser projection device in the using process can be improved.
Description
technical field [0001] The invention relates to the fields of optics and optoelectronics, in particular to a laser projection device and a safety control method thereof. Background technique [0002] Laser projection devices are widely used in 3D scanning of objects, 3D spatial reconstruction, human-computer interaction and other fields. The laser projection device marks the spatial information of the target object by projecting coded or structured special light patterns, and provides preparations for the information collection and three-dimensional reconstruction of the later image acquisition device. [0003] A laser projection device for projecting structured light generally includes a light source, a collimating lens, and a diffractive optical element (DOE). Among them, the collimating lens is used to receive and converge the beam emitted by the light source, and emit parallel beams outward; among them, the DOE is used to receive the parallel beam emitted by the collima...
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Inventor 江隆业邓想全
Owner SHENZHEN ORBBEC CO LTD