Optical apparatus for scanning an object with illumination light flux to detect reflected light flux from the object, and on-board system and mobile apparatus including the same

A mobile apparatus comprising an optical apparatus, wherein the optical apparatus includes:

• a deflection unit configured to deflect an illumination light flux from a light source to scan an object, and configured to deflect a reflected light flux from the object;
• a guiding unit configured to guide the illumination light flux from the light source toward the deflection unit, and configured to guide the reflected light flux from the deflection unit toward a light receiving element;
• and
• a first optical system configured to guide the illumination light flux from the deflection unit toward the object, and configured to guide the reflected light flux from the object toward the deflection unit,
• wherein the deflection unit is arranged so that an optical path of a principal ray of the illumination light flux at a center angle of view in a scanning range of the deflection unit is constantly prevented from coinciding with an optical axis of the first optical system, and
• wherein the mobile apparatus is movable while holding the optical apparatus.

An optical apparatus comprising:

• a deflection unit configured to deflect an illumination light flux from a light source to scan an object, and configured to deflect a reflected light flux from the object;
• a guiding unit configured to guide the illumination light flux from the light source toward the deflection unit, and configured to guide the reflected light flux from the deflection unit toward a light receiving element;
• a first optical system configured to guide the illumination light flux from the deflection unit toward the object, and configured to guide the reflected light flux from the object toward the deflection unit;
• a first imaging optical system configured to collect the reflected light flux from the deflection unit;
• and
• a stop configured to limit the diameter of the reflected light flux from the first imaging optical system,
• wherein the deflection unit is arranged so that an optical path of a principal ray of the illumination light flux at a center angle of view in a scanning range of the deflection unit is prevented from coinciding with an optical axis of the first optical system.