| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicular infrared flood-light capable of eliminating a visible light cutting filter to shield the visible light, which has been used in a conventional vehicular infrared flood-light adopting an incandescent lamp causing heating and emission of visible light, and which has been deteriorated by heating to lower its reliability. SOLUTION: This vehicular infrared flood-light 1 is formed by combining the plural of a flood-light unit 2 composed of a LED lamp 3 for infrared emission and a reflecting surface 4 having a free-formed curved surface, which is provided in front to intercept almost all quantity of light from the LED lamp 3 with the virtual focus point f0 of the LED lamp 3 as a focus point and the axis Y of which is almost perpendicular to its optical axis Z at the position of the virtual focus point f0. Thereby, a visible light cutting filter which has conventionally caused deterioration of characteristics due to overheating is dispensed with by using the LED lamp for infrared emission, which emits no visible light when radiating infrared rays, as a light source. |
