Invention Grant
- Patent Title: Projector lamp headlight with chromatic aberration correction
- Patent Title (中): 投影灯头灯具有色差校正
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Application No.: US11102012Application Date: 2005-04-08
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Publication No.: US07175323B2Publication Date: 2007-02-13
- Inventor: Lloyd Keith Bucher
- Applicant: Lloyd Keith Bucher
- Applicant Address: US MI Southfield
- Assignee: Federal Mogul World Wide, Inc.
- Current Assignee: Federal Mogul World Wide, Inc.
- Current Assignee Address: US MI Southfield
- Agency: Dickinson Wright PLLC
- Main IPC: B60Q1/00
- IPC: B60Q1/00 ; F21V11/06

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.
Public/Granted literature
- US20050225999A1 Projector lamp headlight with chromatic aberration correction Public/Granted day:2005-10-13
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