Laser emitting unit for lidar and lidar

A laser emitting unit for a lidar, wherein the laser emitting unit comprises a light emitting surface and is configured to provide an emission light directed to a target object, the emission light forms an echo light by the target object and is received by a light receiving apparatus, the light emitting surface comprises a first end arranged close to the light receiving apparatus and a second end arranged away from the light receiving apparatus, a direction from the first end to the second end represents a first direction, and a direction vertical to the first direction represents a second direction, wherein

• the light emitting surface of the laser emitting unit comprises an effective light emitting region in which light emitting sources are arranged and an ineffective light emitting region in which no light emitting source is arranged,
• the effective light emitting region comprising, along the first direction, a plurality of light emitting sub-regions, respectively configured to detect target objects at different distances.