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 focus change, lens temperature drift, and affecting the accuracy of laser patterns, etc., to achieve the effect of low cost and easy mass production
Active Publication Date: 2020-01-10
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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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
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[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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The invention discloses a laser projection module, a depth camera and an electronic device. The laser projection module includes a light source, a collimating element and a diffractive optical element. The collimating element includes multiple lenses, and the multiple lenses are arranged on the light emitting light path of the light source. The plurality of lenses includes at least one lens of a first type and at least one lens of a second type. The first type of lens includes a transparent substrate including opposite upper and lower surfaces. The first type of lens also includes an upper sub-lens formed on the upper surface and a lower sub-lens formed on the lower surface, and the upper sub-lens corresponds to the lower sub-lens. The second type of lens is made of plastic material. In the laser projection module, depth camera and electronic device according to the embodiments of the present invention, the first type of lens is made by forming upper and lower sub-lenses on a transparent substrate, which solves the problem of temperature drift of the lens when the ambient temperature changes Problem; the second type of lens is made of plastic material, which is low in cost and easy for mass production.
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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IPC IPC(8): G02B3/00G02B27/42G02B1/04G03B15/02
CPCG02B27/42G03B15/02G02B1/041G02B3/00
Inventor 韦怡
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD