Low glare infrared light source

Details Low glare infrared light source Low glare infrared light source

1994-06-06

1996-04-09

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

313113, 313112, 313580, 362290, H01K 132

Patent

active

055064710

ABSTRACT:
Glare or stray light from a lamp is controlled by determining the location of a filament relative to a major axis of the ellipsoidal portion of a lamp envelope. Once the maximum deviation of the filament from the major axis has been determined, the lamp may be marked with indicia, or immediately secured to a base to assure the location of the filament in the final assembly of the headlamp. Any stray or glare light is then controlled or directed in a predetermined manner.

REFERENCES:
patent: 4249101 (1981-02-01), Walsh
patent: 4275327 (1981-06-01), Walsh
patent: 4331901 (1982-05-01), de Vrijet et al.
patent: 4535269 (1985-08-01), Tschetter et al.
patent: 4580199 (1986-04-01), Wurster et al.
patent: 4924359 (1990-05-01), Lindae et al.
patent: 5045748 (1991-09-01), Ahlgren et al.
patent: 5254902 (1993-10-01), Griffin et al.

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