Laser projection module, depth camera and electronic device
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorXueyong Zhang
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Abstract
A laser projection module, a depth camera and an electronic device are provided. The laser projection module includes a laser emitter, a collimation element, a diffractive optical element and a temperature detection element. The laser emitter is configured to emit laser. The collimation element is arranged in a laser emission direction of the laser emitter and configured to collimate the laser. The diffractive optical element is arranged in a position subsequent to the collimation element along the laser emission direction of the laser emitter, and configured to diffract the laser collimated by the collimation element to form a laser pattern. The temperature detection element is arranged adjacent to the laser emitter and configured to detect a temperature of the laser emitter.
Claims19
A laser projection module, comprising:
- a laser emitter configured to emit laser;
- a collimation element arranged in a laser emission direction of the laser emitter and configured to collimate the laser;
- a diffractive optical element arranged in a position subsequent to the collimation element along the laser emission direction of the laser emitter, and configured to diffract the laser collimated by the collimation element to form a laser pattern;
- and
- a temperature detection element arranged adjacent to the laser emitter and configured to detect a temperature of the laser emitter,
- wherein the laser emitter is an edge-emitting laser, and the edge-emitting laser comprises a light-emitting surface facing the collimation element.
A depth camera, comprising:
- a laser projection module, the laser projection module comprising:
- a laser emitter configured to emit laser;
- a collimation element configured to collimate the laser;
- a diffractive optical element configured to diffract the laser collimated by the collimation element to form a laser pattern;
- and
- a temperature detection element configured to detect a temperature of the laser emitter and output a temperature detection signal;
- an image collector configured to acquire the laser pattern projected by the laser projection module to a target space;
- and
- a processor coupled to the temperature detection element, and configured to adjust an emission power of the laser emitter according to the temperature detection signal and to process the laser pattern to obtain a depth image.
An electronic device, comprising a housing and a depth camera, the depth camera being disposed in the housing and configured to be exposed out of the housing to acquire a depth image, the depth camera comprising:
- a laser projection module, the laser projection module comprising:
- a laser emitter configured to emit laser;
- a collimation element configured to collimate the laser;
- a diffractive optical element configured to diffract the laser collimated by the collimation element to form a laser pattern;
- and
- a temperature detection element configured to detect a temperature of the laser emitter and output a temperature detection signal;
- an image collector configured to acquire the laser pattern projected by the laser projection module to a target space;
- and
- a processor coupled to the temperature detection element, and configured to adjust an emission power of the laser emitter according to the temperature detection signal and to process the laser pattern to obtain a depth image.
Dependencies are inferred from the claim text.