DIFFRACTIVE OPTICAL ELEMENT, MANUFACTURING METHOD THEREFOR, LASER PROJECTION MODULE, DEPTH CAMERA AND ELECTRONIC DEVICE - GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

Title:

DIFFRACTIVE OPTICAL ELEMENT, MANUFACTURING METHOD THEREFOR, LASER PROJECTION MODULE, DEPTH CAMERA AND ELECTRONIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2019/174426

Kind Code:

A1

Abstract:

An electronic device (1000), a depth camera (100), a laser projection module (10), a diffractive optical element (15) and a manufacturing method for the diffractive optical element (15). The manufacturing method for the diffractive optical element (15) comprise: providing a base material (151); and forming a plurality of multi-step diffraction grooves (1521) on the base material (151).

Inventors:

ZHOU QIQUN (CN)

Application Number:

PCT/CN2019/073947

Publication Date:

September 19, 2019

Filing Date:

January 30, 2019

Export Citation:

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Assignee:

GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)

International Classes:

G02B5/18; G02B1/00; G02B27/42

Foreign References:

CN108490521A	2018-09-04
CN108490522A	2018-09-04
CN108490523A	2018-09-04
CN101349773A	2009-01-21
CN101349773A	2009-01-21
CN104570181A	2015-04-29
CN85100054A	1986-08-06
CN107102506A	2017-08-29

Attorney, Agent or Firm:

TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)

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