Optical apparatus, in-vehicle system, and moving apparatus

An optical apparatus comprising:

• a deflection unit configured to deflect illumination light from a light source to scan an object, and to deflect reflected light from the object;
• and
• a light guide unit configured to guide the illumination light to the deflection unit, and to guide the reflected light from the deflection unit to a light receiving unit,
• wherein the light guide unit includes a first passage area and a second passage area through which the illumination light passes, and a reflective area for reflecting the reflected light,
• wherein the illumination light is branched into first illumination light and second illumination light by the light guide unit, and
• wherein the first illumination light is emitted from the first passage area and the second illumination light is emitted from the second passage area so that an emission direction of the first illumination light and an emission direction of the second illumination light are not parallel to each other, and then the first illumination light and the second illumination light enter the deflection unit.