Diffraction optical element and manufacturing method thereof, laser projection module, depth camera and electronic device
A diffractive optical element and laser projection technology, which is applied to optical elements, diffraction gratings, optics, etc., can solve the problems of high manufacturing difficulty, low manufacturing efficiency and high manufacturing cost of diffractive optical elements, and achieve the effect of small temperature drift
Inactive Publication Date: 2018-09-04
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology
[0002] Due to the complexity of the diffractive structure on the diffractive optical element, the manufacturing process of the diffractive optical element is more and more difficult, which in turn leads to lower manufacturing efficiency and higher manufacturing cost of the diffractive optical element
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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 figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0045] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating ...
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The manufacturing method of a diffraction optical element comprises the steps of: providing base materials made of quartz glass; and etching the base materials to form a plurality of multi-step diffraction grooves on the base materials. The manufacturing method of the diffraction optical element forms the multi-step diffraction grooves on the base materials made of quartz glass through an etchingmode to obtain the diffraction optical element, the intensity influence of forming the diffraction grooves through the etching mode on the base materials is little, and the intensity of the diffraction optical element formed in the etching mode is large. The base materials are made of quartz glass, the influence of the temperature on the diffraction optical element is little, and the generation temperature excursion is little. The present invention further discloses a diffraction optical element, a laser projection module, a depth camera and an electronic device.
Description
technical field [0001] The present invention relates to the technical field of consumer electronics, and in particular to a manufacturing method of a diffractive optical element, a diffractive optical element, a laser projection module, a depth camera and an electronic device. Background technique [0002] Since the diffractive structure on the diffractive optical element is more complicated, the manufacturing process of the diffractive optical element is more and more difficult, which leads to lower manufacturing efficiency and higher manufacturing cost of the diffractive optical element. Contents of the invention [0003] Embodiments of the present invention provide a method for manufacturing a diffractive optical element, a diffractive optical element, a laser projection module, a depth camera, and an electronic device. [0004] The manufacturing method of the diffractive optical element according to the embodiment of the present invention includes: [0005] providing ...
Claims
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IPC IPC(8): G02B5/18G02B1/00G02B27/42
CPCG02B5/1857G02B1/00G02B27/4205
Inventor 周奇群
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD