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Microprism optical element and projection module for realizing laser dot matrix

An optical element and laser dot matrix technology, applied in the field of three-dimensional sensing, to achieve the effects of reducing stray light, improving laser energy utilization efficiency, and easy processing and manufacturing

Active Publication Date: 2022-04-12
JIAXING UPHOTON OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

A laser light source emits a laser beam

Method used

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  • Microprism optical element and projection module for realizing laser dot matrix
  • Microprism optical element and projection module for realizing laser dot matrix
  • Microprism optical element and projection module for realizing laser dot matrix

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. For ease of description, only parts related to the invention are shown in the drawings.

[0044] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0045] First, refer to Figure 1 to Figure 5 A projection module for projecting a laser dot matrix and a microprism optical element according to Embodiment 1 of the present invention are introduced.

[0046] figure 1 It is a schematic diagram of the projection module 1 according to Embodiment 1 of the present invention. Su...

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Abstract

The application discloses a projection module for realizing a laser dot matrix, the projection module includes a laser light source, a collimation device, and a microprism optical element, wherein the microprism optical element has two main surfaces for light incident and exit , two main surfaces are opposite to each other, wherein at least one main surface includes a plurality of microprism surfaces with different inclination angles, wherein the collimated beam is split by the refraction of the plurality of microprism surfaces and the collimated beam is split by the same The split beams obtained by splitting a collimated beam are projected along a plurality of different predetermined projection angles to obtain a laser dot matrix. The application also discloses a microprism optical element. According to the embodiments of the present invention, splitting the laser light based on the principle of optical refraction to obtain a laser lattice can improve the efficiency of laser energy utilization, significantly reduce stray light generated by diffraction, and make the design more flexible and easier to process and manufacture.

Description

technical field [0001] The present invention generally relates to three-dimensional sensing technology, in particular to a microprism optical element for projecting a laser dot matrix based on a laser collimated beam and a projection module for realizing the laser dot matrix. Background technique [0002] Structured light 3D sensing technology is widely used in consumer electronics, robotics, logistics, industrial inspection and other fields. Among structured light for 3D sensing technology, laser lattice is the most widely used. [0003] When using DOE (Diffractive Optical Element) to design the laser beam splitting lattice, since the DOE itself is a binary phase modulation device, the optical efficiency is relatively low and the design is complicated. The computing platform is relatively demanding, and the requirements in processing and production are also high. [0004] Therefore, it is urgent to propose a new technology for obtaining laser lattices. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B15/02G02B27/12G02B5/04
CPCG03B15/02G02B27/126G02B5/045
Inventor 冯辉尹晓东
Owner JIAXING UPHOTON OPTOELECTRONICS TECH CO LTD
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