Laser speckle projection device

A laser speckle and projection device technology, which is applied to lasers, laser components, semiconductor lasers, etc., can solve problems such as the inability to dynamically adjust the brightness of a single light-emitting point, and achieve the effect of improving robustness and randomness

Active Publication Date: 2019-10-18
NINGBO YINGXIN INFORMATION TECH
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AI Technical Summary

Problems solved by technology

Limited by the fixed arrangement of the light-emitting dot matrix of the current vertical cavity surface emitting laser (VCSEL), generally only the s

Method used

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  • Laser speckle projection device
  • Laser speckle projection device
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Embodiment Construction

[0027] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] In the embodiment of the present invention, the liquid crystal module 3 is used to control whether the light emitted by the light-emitting dot matrix 4 is transmitted, the intensity and the angle of the transmission, specifically as figure 1 shown. In this embodiment, the laser emitter is preferably a Vertical-Cavity Surface-Emitting Laser (VSCEL, Vertical-Cavity Surface-Emitting Laser). For the light-emitting lattice 4 of VCSEL, it can be based on a VCSEL light-emitting substrate or a plurality of VCSEL light-emitting substrates, and a plurality of VCSEL light-emitting particles 40 are regularly or irregularly arranged on the one or more light-emitting subs...

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Abstract

The disclosure provides a laser speckle projection device. A liquid crystal module controls whether light from a light emitting point of a laser emitter is transmitted and controls a transmission intensity and angle of the light, so that a laser speckle coding pattern with the dynamically controlled projected speckle point number, shape and intensity is realized. The provided laser speckle projection device has the light-emitting dot matrix arranged fixedly but can output different speckle coding patterns; and the brightness and shape of the single light-emitting point can be adjusted dynamically. Therefore, the randomness of the speckle structure light coding is improved; the time-space coding is realized; and the robustness of the coding pattern is enhanced.

Description

technical field [0001] The invention belongs to the technical fields of artificial intelligence, machine vision and laser three-dimensional imaging, and in particular relates to a laser speckle projection device. Background technique [0002] Structured light is an optical technology for reconstructing targets based on stereo vision. It usually consists of a coded projector, a receiving camera, and a structured light decoding module. Depth information is obtained through laser triangulation. Compared with other equipment for extracting depth information, such as laser rangefinder and sonar rangefinder, structured light measurement system has potential advantages in accuracy, price and speed, and can be widely used in 3D space measurement, depth detection and 3D surface restoration . [0003] The active light source used in the active visual depth perception technology based on structured light is generally an infrared laser source, such as a vertical cavity surface emitting...

Claims

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Application Information

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IPC IPC(8): G02B27/42G02B27/48G02F1/13H01S5/42G02F1/1362
CPCG02B27/4205G02B27/48G02F1/1313G02F1/136277H01S5/423
Inventor 葛晨阳杨超周炳张康铎郝希应
Owner NINGBO YINGXIN INFORMATION TECH
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