Headlamp with enhanced light gathering condenser

Details Headlamp with enhanced light gathering condenser Headlamp with enhanced light gathering condenser

1997-03-03

1999-04-13

Lazarus, Ira S.

Illumination

Light source and modifier

Plural serial lens elements or components

362331, 362105, 362559, 362560, 362572, F21V 2900

Patent

active

058936351

ABSTRACT:
A headlamp module for providing a uniform field of illumination at a predetermined distance includes a headlamp housing having a first end and a second end. A light source such as a terminated fiber optic cable is disposed within the first end of the housing. A condenser system is disposed within said headlamp housing in optical communication with a light source which is positioned close to the condenser. The condenser system, which comprises a pair of planar convex lenses oriented with the convex sides facing each other, is in optical communication with a reflecting element such as a planar mirror or a reflecting prism. The light reflected by the reflecting element is directed to an exit lens, such as a projection lens or an objective. The light exiting the exit lens provides the uniform field of illumination despite the presence of a real image of the light source termination at a distance close to the exit lens. An iris may be used between the condenser and the reflective element to narrow the light reaching the reflective element.

REFERENCES:
patent: 3586851 (1971-06-01), Rudolph
patent: 4104709 (1978-08-01), Kloots
patent: 4530578 (1985-07-01), Kato
patent: 4576160 (1986-03-01), Tanaka
patent: 4621283 (1986-11-01), Feinbloom
patent: 4628416 (1986-12-01), Dewey
patent: 4797736 (1989-01-01), Kloots et al.
patent: 4887190 (1989-12-01), Sadamune et al.
patent: 4918583 (1990-04-01), Kudo et al.
patent: 5163420 (1992-11-01), Van Der Bel
patent: 5634704 (1997-06-01), Shikama et al.

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