Projection optical system

摘要

Provided is a projection optical system which includes a first optical part (1) which projects an image; a second optical part (2) having an image forming device, which forms an image using a light and emits the image to the first optical part; a third optical part (3) having at least one light source (5) which emits the light; and a deflector (4) which guides the light emitted from the third optical part toward the second optical part, wherein an optical axis (9) of the third optical part is angled toward an optical axis (8) of the second optical part, and an optical axis (7) of the first optical part and the optical axis (8) of the second optical part are parallel to each other and separated from each other.