Laser projection module and detection method and device thereof, depth camera and electronic device

Abstract

The invention discloses a detection method of a laser projection module. The laser projection module is configured to project a laser pattern. The detection method includes: acquiring the laser pattern at a predetermined time; determining whether a preset identifier exists in the laser pattern; and determining that the laser projection module is abnormal if not. The invention also discloses a laser projection module, a detection device thereof, a depth camera and an electronic device. The laser projection module, the detection method and device thereof, the depth camera and the electronic device of the invention determine whether the laser projection module is abnormal according to whether the preset identifier exists in the laser pattern, so that the laser projection module can be turnedoff or the transmitting power of the laser projection module can be reduced so as to avoid damage to a user when the laser projection module is abnormal.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to a detection method for a laser projection module, a detection device for a laser projection module, a laser projection module, a depth camera and an electronic device. Background technique [0002] The depth camera uses the light source of the laser projection module to emit laser light, thereby assisting the infrared camera to obtain structured light images. Under normal circumstances, the energy of the laser emitted by the light source is attenuated after passing through the optical system (such as collimating elements, diffractive optical elements), and will not cause harm to the human body. However, the optical system is usually composed of glass or other fragile parts. Once the optical system is broken or other abnormal situations occur, the laser will be emitted directly and irradiate the user's body or eyes, causing serious safety hazards. How to determine the abnormalit...

AI Technical Summary

Problems solved by technology

However, the optical system is usually composed of glass or other fragile parts. Once the optical system is broken or other abnormal situations occur, the laser will be emitted directly and irradiate the user's body or eyes, causing serious safety hazards. How to determine the abnormality of the laser projection module is an urgent problem to be solved in this field

Images