Laser projection module, depth camera and electronic device

Abstract

The present invention discloses a laser projection module, a depth camera and an electronic device. The laser projection module comprises a light source, a collimation element and a diffraction optical element. The collimation element comprises lenses arranged on a luminescence optical path of the light source. The lenses comprise at least one first-class lens and at least one second-class lens. The at least one first-class lens comprises a transparent substrate consisting of an upper surface and a lower surface which are opposite. The at least one first-class lens further comprises an upper sub lens formed at the upper surface and a lower sub lens formed at the lower surface, and the upper sub lens corresponds to the lower sub lens. The at least one second-class lens is made of glass materials. According to the laser projection module, the depth camera and the electronic device, the at least one first-class lens is made by employing a mode of forming the upper sub lens and the lower sub lens on the transparent substrate so as to solve the problem that the lenses can generate a temperature excursion phenomenon when an environment temperature is changed; and the at least one second-class lens is made of glass materials to further solve the problem that the lenses generate the temperature excursion phenomenon.

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...

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

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