Laser projection device

A technology of laser projection and light beam, which is applied in the field of optics and electronics, can solve the problems of low imaging quality, large speckle noise, and low speckle contrast, and achieve the effect of small volume, low magnification, and high pattern quality

Inactive Publication Date: 2017-07-28
SHENZHEN ORBBEC CO LTD
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Many existing solutions will encounter many problems in the process of reducing the volume, such as l

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[0023] The present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following descriptions are only exemplary and not intended to limit the scope of the present invention and its application.

[0024] In the description of the present invention, it should be understood that the terms "first", "second", "third" and "fourth" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implying Contains the number of indicated technical features. Thus, a feature defined as "first", "second", "third" and "fourth" may expressly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] Depth cameras are mainly divided into structured light depth cameras, TOF depth cameras and binocular ...

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Abstract

The invention provides a laser projection device and a depth camera thereof. The laser projection device comprises a VCSEL array, a micro-lens array, a main lens and a pattern generation optical element. Micro-lens units receive and focus light beams emitted by corresponding VCSEL units. The main lens carries out secondary focusing imaging on the light beams of the micro-lens array. Through a secondary imaging optical path consisting of the micro-lens array and the main lens, quite low magnification times is achieved, so imaging quality of a laser projection module is improved and the laser projection device is quite small in size. In addition, according to the difference application scene requirements, the distance between the micro-lens array and the main lens can be adjusted in the installation to increase or decrease the magnification times, thereby satisfying the size of required spot patterns at a long distance or a small distance.

Description

technical field [0001] The invention relates to the fields of optics and electronics, in particular to a laser projection device. Background technique [0002] The depth camera can obtain the depth information of the target to realize 3D scanning, scene modeling, and gesture interaction. Compared with the currently widely used RGB camera, the depth camera is gradually being valued by all walks of life. For example, the combination of depth camera, TV and computer can realize somatosensory games to achieve the two-in-one effect of game and fitness. Microsoft's KINECT and Obi Zhongguang's ASTRA are representatives of them. In addition, Google's tango project is committed to bringing depth cameras to mobile devices, such as tablets and mobile phones, so as to bring a completely subversive experience. For example, it can realize a very real AR game experience, and can use it for indoor map creation and navigation. and other functions. [0003] The core component of the depth c...

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Application Information

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IPC IPC(8): G03B21/20
CPCG03B21/2033G03B21/206
Inventor 黄杰凡王兆民许星
Owner SHENZHEN ORBBEC CO LTD
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