Patent ID: 7798689
Filing Date: 2010-09-21
Classification: F21S,F21V

Abstract:
1. An infrared light irradiating lamp for a vehicle comprising: a projection lens disposed on an optical axis extending in a longitudinal direction of the vehicle; a light source bulb behind a rear side focal point of the projection lens, the light source bulb comprising a filament for emitting a light; a reflector for reflecting the light emitted from the light source bulb in a forward direction close to the optical axis; and an infrared light transmitting filter disposed between the reflector and projection lens, wherein the infrared light transmitting filter comprises an infrared light transmitting film and a diffusing portion for diffusing a light transmitted from the reflector, wherein the infrared light transmitting filter is movable between a transmitting position in which the infrared light transmitting film intercepts light reflected by the reflector and a retreating position in which the infrared light transmitting film does not intercept the reflected light, and wherein the infrared light transmitting filter is disposed behind a rear side focal point of the projection lens, and a groove bottom portion of the diffusing portion takes a concave shape that intersects the optical axis.