Electric lamp with reflector

Details Electric lamp with reflector Electric lamp with reflector

1995-04-04

1996-10-29

Gromada, Denise L.

Illumination

Light modifier

Refractor

362297, 362346, 362348, 362255, F21V 500

Patent

active

055689671

ABSTRACT:
The electric lamp with reflector has a concave reflecting surface of a rotationally-symmetric general shape, onto which flat four-sided facets are superimposed which are tangent to the general shape. The facets each illuminate a rectangular field in a plane perpendicular to the optical axis of the reflector, which fields are of equal shape and size and have the same orientation. Thereby, the electric lamp with reflector is able to illuminate a rectangular field with a high degree of uniformity and of efficiency. The electric lamp with reflector may be used in an image-projection apparatus.

REFERENCES:
patent: 4021659 (1977-05-01), Wiley
patent: 4456948 (1984-06-01), Brun
patent: 4829407 (1989-05-01), Bushell et al.
patent: 4929863 (1990-05-01), Verbeek et al.
patent: 5039904 (1991-08-01), Kosmatka et al.
patent: 5192124 (1993-03-01), Kawashima
patent: 5235470 (1993-08-01), Cheng

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