Optical beam scanner and laser radar unit

A laser radar unit comprising:

• an optical beam scanner including a light source, an optical scanner configured to scan a light beam irradiated from the light source, and an input optical system configured to direct the light beam irradiated from the light source to the optical scanner;
• and
• a light receiving unit configured to receive light reflected by an object that is irradiated by the light beam irradiated from the optical beam scanner;
• wherein the optical scanner includes a rotating mirror configured to rotate around a rotational axis and reflect the light beam irradiated from the light source;
• the rotating mirror is rotated around the rotational axis so that the light beam is irradiated on different positions of a mirror surface of the rotating mirror;
• and
• the mirror surface of the rotating mirror has a mirror surface inclining angle with respect to a direction parallel to the rotational axis, the mirror surface inclining angle being arranged to gradually increase from a first side to a second side of the rotating mirror in a direction parallel to a plane perpendicular to the rotational axis.

A laser radar unit comprising:

• a light emitting unit;
• a light scanning unit configured to scan a light beam irradiated from the light emitting unit;
• and
• a light receiving unit configured to receive light reflected by an object that is irradiated by the light beam irradiated from the light scanning unit;
• wherein
• the light scanning unit includes a light reflecting unit configured to reflect the light beam irradiated from the light source and a rotating unit configured to rotate the reflecting unit around a rotational axis, the light beam being scanned by rotating the rotating unit;
• the light reflected by the object is reflected by the light reflecting unit of the light scanning unit and irradiated on the light receiving unit;
• and
• an inclining angle of the light reflecting unit is adjusted according to a rotation angle of the light reflecting unit.