Projection lamp unit

Details Projection lamp unit Projection lamp unit

1985-03-25

1985-10-01

Walsh, Donald P.

Illumination

Light source and modifier

Including reflector

362297, 362346, 362348, F21V 700

Patent

active

045450005

ABSTRACT:
An improved projection lamp unit including a glass reflector having a concave reflecting surface and a tungsten halogen lamp positioned within the concavity of the reflector. The concave reflecting surface of the reflector is provided with alternately disposed radially extending regions including a series of specular stripes in combination with alternately spaced regions of facets. Preferably four or five stripes and an associated four or five facet regions are provided.

REFERENCES:
patent: 3944810 (1976-03-01), Grindle
patent: 4021659 (1977-05-01), Wiley
patent: 4120579 (1978-10-01), Maiorano
patent: 4239369 (1980-12-01), English
patent: 4308573 (1981-12-01), McNamara
patent: 4403276 (1983-09-01), Blaisdell
patent: 4428038 (1984-01-01), Rakitsch

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