Patent ID: 7497594

Claim:
An illuminating device comprising: a lamp device that includes a lamp body, which is a light source, and a concave reflector that is an ellipsoidal reflector that reflects light emitted from the lamp body to converge; and a lens member that has a planar optical surface and a nonplanar optical surface opposite to the planar optical surface and is provided on an emission side of the lamp device, wherein the lens member is a lens that collimates the light reflected from the ellipsoidal reflector, wherein the lens member is arranged such that a normal line of the planar optical surface is slightly inclined at a predetermined angle with respect to an optical axis of the lamp device, wherein the nonplanar optical surface of the lens member is a concave surface, and the concave surface is arranged closer to the ellipsoidal reflector than the planar optical surface, the lens member is arranged such that light beams substantially parallel to the optical axis are incident on the planar optical surface, and a filter that reflects at least one of an ultraviolet ray and an infrared ray is provided on the planar optical surface.