Illumination – Elongated source light unit or support – With or including transparent or translucent member
Patent
1986-07-16
1988-10-18
Jones, Larry
Illumination
Elongated source light unit or support
With or including transparent or translucent member
353 62, 353 84, 353 42, 40560, 362222, 362307, F21M 2100, G03B 2100, G03B 2114
Patent
active
047791764
ABSTRACT:
A light pattern generator is utilized to produce an image which is projected onto a stage or screen. The image is derived from a beam of light. The light pattern generator comprises a heat resistant glass plate having a reflective layer deposited on one surface thereof. A nonreflective layer is deposited on the surface of the reflective layer. Both of the layers are etched to produce an opening extending through the layers wherein the opening has the shape of the desired image. The beam of light is directed through the transparent plate and the portions not passed through the opening are reflected by the mirror surface of the reflective layer. This prevents the buildup of heat within the light pattern generator. Any extraneous light which is received at the nonreflective layer is absorbed to prevent the escape of unwanted light and its projection to the stage.
REFERENCES:
patent: 2055217 (1936-09-01), Gauthier
patent: 2077111 (1937-04-01), Kent
patent: 2379534 (1945-07-01), Lowden
patent: 2498294 (1950-02-01), Pennom et al.
patent: 2959094 (1960-11-01), Kosma
patent: 4222641 (1980-09-01), Stolov
Jones Larry
Vari-Lite Inc.
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