OBJECT DETECTOR, SENSING APPARATUS, AND MOBILE OBJECT

An object detector includes: an optical scanner including: a light source unit configured to emit a light beam; and a light deflector configured to deflect the light beam emitted from the light source unit to scan an object in a detection region with the deflected light beam; a light receiving optical element configured to collect the light beam returned from the object through at least one of reflection or scatter on the object in the detection region in response to scanning with the light beam deflected by the light deflector; and a light receiving element configured to receive the light beam collected by the light receiving optical element, the light receiving element including multiple light receiving pixels arranged in a first direction at different positions on a plane perpendicular to the optical axis.