| 摘要 |
PROBLEM TO BE SOLVED: To reduce irregular color of an irradiation face and improve light distribution characteristics and luminescence efficiency by combining an electric lamp forming a visible light transmission infrared ray reflection film with a reflection mirror. SOLUTION: In radiation light of a tungsten halogen lamp L1, beam Y toward a reflection mirror 7 is incident on a visible reflection film 8, the visible light is reflected, a reflection light Z is radiated from an opening part, and an infrared ray V transmitting a red reflection film 6 transmits a visible reflection film 8 and is radiated on a back face of the reflection mirror 7. Consequently, an lamp RL1 emits beams in which infrared rays are reduced from an opening part of the reflection mirror 7 and a majority of infrared rays from the back face of the reflection mirror 7, respectively. When the electric lamp L1 is disposed from an elliptical focus near a bottom face of the reflection mirror 7, a bulb part 11 in which the shape of the bulb 1 is suddenly and greatly changed near a crash sealing part 3 in which a film thickness of the red reflection film 6 is thick is more downward than a virtual line 7 not protruded into the reflection face 8, and an incident angle to a reflection face 71 of the reflection mirror 7 is an opening 73, generation of irregular color due to distortion of wavelength can be reduced free of the reflection light from this part. |
