Laser projector, camera unit and electronic device

A camera unit, comprising:

• a laser projector, comprising
• a substrate assembly;
• a lens barrel assembly comprising a first component and a second component movably connected to each other, the first component being disposed to the substrate assembly;
• an edge-emitting laser disposed to the substrate assembly;
• a collimation element mounted to one of the first component and the second component and configured to collimate a laser emitted by the edge-emitting laser towards the collimation element;
• and
• a diffraction element disposed to the second component and configured to diffract the laser collimated by the collimation element to form a laser pattern;
• an image acquirer configured to acquire the laser pattern projected by the laser projector into a target space;
• and
• a processor configured to process the laser pattern to obtain a depth image.

An electronic device, comprising:

• a housing;
• and
• a camera unit, comprising:
• a laser projector, comprising;
• a substrate assembly;
• a lens barrel assembly comprising a first component and a second component disposed movably with respect to each other, the first component being connected to the substrate assembly;
• an edge-emitting laser disposed inside the lens barrel assembly;
• a collimation element mounted to one of the first component and the second component and configured to collimate a laser emitted by the edge-emitting laser, the edge-emitting laser comprising a light emitting face, and the light emitting face facing the collimation element;
• and
• a diffraction element disposed to the second component and configured to diffract the laser collimated by the collimation element;
• an image acquirer configured to acquire the laser pattern projected by the laser projector into a target space;
• and
• a processor configured to process the laser pattern to obtain a depth image;
• the camera unit being arranged in the housing and exposed out of the housing to acquire the depth image.