PROJECTOR LAMP HEADLIGHT WITH CHROMATIC ABERRATION CORRECTION

Title:

PROJECTOR LAMP HEADLIGHT WITH CHROMATIC ABERRATION CORRECTION

Document Type and Number:

WIPO Patent Application WO2005100088

Kind Code:

A3

Abstract:

A reduced glare projector style headlight assembly (10) comprises a light source (14), a reflector (12) and an optical lens (18). An opaque mask (16) is positioned between the lens (18) and the reflector (12) for creating an upper shadow region in the focused beam pattern (28) to shield on-coming traffic. The mask (16) includes a transition region (32) proximate its top edge (22) for allowing a limited amount of projected light to pass through the mask (16), into the upper shadow region in the focused beam pattern (28). In several embodiments, the mask (16) is applied or otherwise affixed to a transparent substrate (20) which also supports the transition region (32). To combat undesirable chromatic effects, a color filter (38) can be positioned in the light path (26) for disrupting selective wavelengths of light energy. As alternative approaches, the transparent substrate (20) and/or the lens (18') can be doped with a color filtering material or composition.

Inventors:

BUCHER LLOYD KEITH (US)

Application Number:

PCT/US2005/011876

Publication Date:

December 07, 2006

Filing Date:

April 08, 2005

Export Citation:

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Assignee:

FEDERAL MOGUL CORP (US)
BUCHER LLOYD KEITH (US)

International Classes:

B60Q1/00; B60Q1/04; B60Q3/00; F21V5/00; F21V9/00; F21V9/04; F21V9/06; F21V9/08; F21V11/00; F21V11/16; F21V11/14

Foreign References:

US5660462A	1997-08-26
US5728251A	1998-03-17
US5829870A	1998-11-03
US6017138A	2000-01-25
US4142229A	1979-02-27
US4209825A	1980-06-24
US4814960A	1989-03-21
US5023758A	1991-06-11
US5438486A	1995-08-01

Other References: