Laser projection module, depth camera and electronics

A laser projection and module technology, applied in optics, optical components, instruments, etc., can solve the problems of affecting laser pattern accuracy, lens temperature drift, focus change, etc., achieving low cost, easy mass production, and solving temperature drift. effect of phenomenon

Active Publication Date: 2020-01-10
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The collimation element generally includes a lens structure. When the ambient temperature changes, the lens will have a temperature drift phenomenon. When the temperature drift is large, the focus of the lens will even change, which will affect the laser projected by the laser projection module into the target space. Pattern Accuracy

Method used

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  • Laser projection module, depth camera and electronics
  • Laser projection module, depth camera and electronics
  • Laser projection module, depth camera and electronics

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Embodiment Construction

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, are only for explaining the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention.

[0045] In describing the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front ", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", etc. The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the e...

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Abstract

The invention discloses a laser projection module, a depth camera and an electronic device. The laser projection module comprises a light source, a collimating element and a diffractive optical element. The light source is used for emitting the laser. The collimating element is used for collimating the laser. The collimating element includes a plurality of lenses. The plurality of lenses are arranged on the light emitting path of the light source. The plurality of lenses includes at least one first-type lens and at least one second-type lens. The first-type lens is made of glass, and the second-type lens is made of plastic material. The diffractive optical element is used for diffracting the laser after being collimated by the collimating element so as to form a laser pattern. According tothe laser projection module, the depth camera and the electronic device, the first-type lens is made of glass. Therefore, the problem that a lens can generate a temperature drift phenomenon when theambient temperature changes is solved. The second-type lens is made of the plastic material. Therefore, the cost is low, and the mass production is facilitated.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to a laser projection module, a depth camera and an electronic device. Background technique [0002] The laser projection module consists of a light source, a collimator and a diffractive optical element (DOE). The collimation element generally includes a lens structure. When the ambient temperature changes, the lens will have a temperature drift phenomenon. When the temperature drift is large, the focus of the lens will even change, which will affect the laser projected by the laser projection module into the target space. Pattern precision. Contents of the invention [0003] Embodiments of the present invention provide a laser projection module, a depth camera, and an electronic device. [0004] The laser projection module according to the embodiment of the present invention includes: [0005] a light source for emitting laser light; [0006] A collimation element, the coll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/30G02B27/42G02B1/00G02B1/04
CPCG02B1/00G02B1/041G02B27/30G02B27/4205
Inventor 韦怡
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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