Optics: image projectors – Film gate – And lens support
Patent
1997-01-30
1999-09-14
Dowling, William
Optics: image projectors
Film gate
And lens support
353119, G03B 2114
Patent
active
059511370
ABSTRACT:
A fixed image projection system that can project an image for a short or long period of time without damage to the film. The system is comprised of a light source having a halogen lamp and a cold coated reflector detachably mounted on a housing having film guides or rails for receiving a film frame. The housing includes a plurality of whisper fans that draw cool air into the housing and expel it from the opposite sides of the housing to maintain a relatively cool temperature at the film frame. Preferably, the fans have a dual speed control to allow a higher speed as an option. A lens barrel is detachably supported on the opposite side of the housing from the light source and includes movable lenses to focus the image. Images may be fed into the system on a film frame one at a time, or by motorized film canisters that allow forward or backward advancement to a selected image on a roll containing multiple images.
REFERENCES:
patent: 3542464 (1970-11-01), Dimitracopoulos
patent: 3554638 (1971-01-01), Dimitracopoulos
patent: 5170196 (1992-12-01), Itoh
patent: 5663762 (1997-09-01), Nishiyama
Angstrom Stage Lighting, Inc.
Dowling William
O'Reilly David
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