Object detection device and sensing apparatus

An object detection device comprising:

• a light source;
• a light deflector that scans a scanning area with light emitted from the light source;
• an imaging forming optical system;
• and
• a light-receiving unit that, when an object is present in the scanning area, receives reflected light from the object through the imaging forming optical system, wherein
• the light emitted from the light source is emitted to the object so as to irradiate an area having a shape longer in a second direction orthogonal to a first direction than in the first direction,
• a focal length of the imaging forming optical system in the first direction and that in the second direction are difference from each other, and
• Wpds/Wpdrn<Wes/Wem is satisfied, where Wpdm is a length of the light-receiving region in the first direction, Wpds is a length of the light-receiving region in the second direction, Wem is a length of the area irradiated with the light emitted to the object, in the first direction, and Wes is a length of the area irradiated with the light emitted to the object, in the second direction.