Infrared irradiation lamp for automobile

Abstract

An infrared light irradiation lamp comprises a lighting chamber S formed by a lamp body 12 and a front lens 14, a reflector 16 provided in the lamp body 12, a light source 20 provided ahead of the reflector 16 in the lighting chamber S, and a cylindrical globe 30 for infrared light formation which is provided to cover the light source 20 and serves to shield a visible light and to transmit only an infrared light, wherein diffusion steps 17 and 15 are provided in a peripheral region 16a of the light source in the reflector 16 and/or a region 14a in the front lens 14 corresponding to the peripheral region 16a of the light source in the reflector. Thus, a red light component L2 of a visible light transmitted through the globe 30 and guided to the peripheral region 16a of the light source in the reflector is diffused and reflected (L21, L22) or is diffused and emitted through the region 14a of the central part of the front lens so that the luminous flux density of the red light component distributed forward is reduced to dilute a red light emitted from the lamp.

Dependencies are inferred from the claim text.