Projector lamp emitting color light

Details Projector lamp emitting color light Projector lamp emitting color light

1988-03-09

1989-09-26

Wieder, Kenneth

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

313112, 350166, H01J 510, H01J 6140, H01K 132

Patent

active

048703184

ABSTRACT:
The invention refers to a projector lamp, which comprises a light source (3), a mirror (1) arranged in a space relationship to the light source (3) for projecting the light emitted by the light source (3) in a predetermined direction, the mirror (1) having a surface determined by a carrier element made of glass or plastics, and a layer system covering the surface of the mirror (1) and including layers characterized by refractive indices alternately at least 2.0 and at most 1.7. The improvement lies in applying layer system including at least four layers (4, 5, 6, 7) prepared for reflecting respective color components of the light emitted by the light source (3). The proposed projector lamp is capable of emitting color light without applying filters.

REFERENCES:
patent: 3527974 (1970-09-01), Cooper
patent: 3615161 (1971-10-01), Bragg
patent: 4386292 (1983-05-01), Rothwell et al.
patent: 4792716 (1988-12-01), Walsh

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