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Laser projector and depth camera thereof

A laser projector and laser technology, applied in the field of optics, can solve the problem of reducing the irrelevance of laser patterns, and achieve the effect of improving irrelevance, speed and accuracy

Active Publication Date: 2017-04-19
SHENZHEN ORBBEC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a laser projector and its depth camera to solve the problem in the prior art that the irrelevance of the emitted laser patterns is reduced in order to meet the output power and volume requirements of the laser projector. question

Method used

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  • Laser projector and depth camera thereof
  • Laser projector and depth camera thereof
  • Laser projector and depth camera thereof

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Embodiment Construction

[0030] refer to figure 1 , figure 1 It is a structural schematic diagram of an embodiment of the laser projector of the present invention.

[0031] The laser projector of this embodiment includes a base 10 , at least two light emitting elements 11 and 12 , a controller 13 , at least two lenses 151 , 152 and a diffractive optical element 14 .

[0032] Wherein, the diffractive optical element 14 is disposed at a position separated from the base 10 by a first distance; at least two light emitting elements 11, 12 are fixed on the side of the base 10 facing the diffractive optical element 14; at least two lenses 151, 152 are disposed on the base 10 and the diffractive optical element 14.

[0033] Wherein, at least two light-emitting elements 11, 12 emit laser light under the control of the controller 13, and at least two lenses 151, 152 are used to focus and / or collimate the laser light emitted by the at least two light-emitting elements 11, 12, Fig. The at least two lenses 151,...

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Abstract

The invention discloses a laser projector and a depth camera thereof. The laser projector comprises a foundation, at least two light emitting elements, a controller, at least two lenses and a diffraction optical element, wherein the at least two light emitting elements are fixed at one side of the foundation facing towards the diffraction optical element and emit laser under the control of the controller, the diffraction optical element is arranged at a position spaced from the foundation a first distance and is used for emitting laser patterns after laser beam expansion, and the at least two lenses are arranged between the foundation and the diffraction optical element and / or at one side of the diffraction optical element opposite to the foundation, are used for carrying out focusing and / or collimation of the laser and are set to have at least two types of different focal lengths and / or at least two different second distances spaced from the at least two light emitting elements. The laser projector is advantaged in that laser pattern irrelevance is improved on the condition that output power and volume requirements can be satisfied, and thereby a depth image acquisition speed and acquisition precision of the depth camera are improved.

Description

technical field [0001] The invention relates to the field of optics, in particular to a laser projector and a depth camera thereof. Background technique [0002] Laser projectors are used to emit set optical patterns to the target space, and are widely used in the field of optical-based three-dimensional measurement. A laser projector generally consists of a light source, a collimating mirror, and a diffractive optical element. The light source can be a single edge-emitting laser light source or an area array laser light source composed of multiple vertical cavity surface-emitting lasers. [0003] A laser projector based on a single edge-emitting laser source can emit a laser pattern with high irrelevance, but its volume will increase significantly with the increase of output power, and the uniformity of the laser pattern is poor; A laser projector with at least two vertical-cavity surface-emitting laser sources can emit a laser pattern with the same power and higher unifor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G02B27/42G03B21/14G01B11/25G02B27/48
CPCG01B11/25G02B27/4233G02B27/48G03B21/14G03B21/208
Inventor 黄源浩刘龙肖振中许星
Owner SHENZHEN ORBBEC CO LTD
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