Projection-type headlamp also having infrared light emitting function
First Claim
1. A projection-type headlamp serving also as an infrared light-emitting lamp comprising:
- an ellipsoidal reflector, a light source disposed at a first focal point of said reflector, a projection lens disposed forward of said reflector, and a shade disposed near a second focal point of said reflector for shielding visible light and passing infrared light for simultaneously forming a predetermined visible light beam pattern having a cut line and a predetermined infrared light beam pattern, an upper edge portion of said shade being positioned above an optical axis of said reflector.
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Accused Products
Abstract
A projection-type headlamp serving also as an infrared light-emitting lamp assuring a sufficient intensity of infrared light irradiation ahead of a vehicle while preventing glare to oncoming vehicles in the adjacent lane. The headlamp is provided with an ellipsoidal reflector, a light source, a shade in the form of an infrared light-transmitting film for reflecting visible light and while allowing infrared light to pass through, and a projection lens for forming simultaneously a predetermined visible light beam pattern and a predetermined infrared light beam pattern, in which an upper edge portion of the shade is positioned above the optical axis of the reflector. A cut line and a hot zone of the visible light beam pattern are set beneath the horizontal line on a light distribution screen so that the visible light beam cannot cause glare for drivers of oncoming vehicles in the opposite lane, and a hot zone of the infrared light beam pattern is set on the horizontal line on the light distribution screen. With this arrangement, the infrared light beam reaches a long distance, and the imaging performance of an infrared noctovision camera is enhanced
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Citations
20 Claims
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1. A projection-type headlamp serving also as an infrared light-emitting lamp comprising:
- an ellipsoidal reflector, a light source disposed at a first focal point of said reflector, a projection lens disposed forward of said reflector, and a shade disposed near a second focal point of said reflector for shielding visible light and passing infrared light for simultaneously forming a predetermined visible light beam pattern having a cut line and a predetermined infrared light beam pattern, an upper edge portion of said shade being positioned above an optical axis of said reflector.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A projection-type headlamp serving also as an infrared light-emitting lamp comprising:
- an ellipsoidal reflector, a light source disposed at a first focal point of said reflector, a projection lens disposed forward of said reflector, and a shade for shielding visible light and passing infrared light for simultaneously forming a predetermined visible light beam pattern having a cut line and a predetermined infrared light beam pattern, wherein said shade comprises an infrared light transmitting and visible light blocking film, said shade being disposed at a focal point of said projection lens with an upper edge portion of said infrared light transmitting and visible light blocking film being aligned with an optical axis of said projection lens, and an optical axis of said reflector being offset below said optical axis of said projection lens such that an upper edge portion of said shade is positioned above said optical axis of said reflector.
- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
Specification