Projection device

Details Projection device Projection device

1979-04-06

1981-04-07

Miller, Jr., George H.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

355 68, 355 71, G03B 2746, G03B 2754, G03B 2772

Patent

active

042602467

ABSTRACT:
A projection device with a projection system for motion picture films, transparencies, slides, etc., for their imaging (if necessary remotely) on a projection screen, a translucent light-transmitting screen or the like, the projection system having a light source and optical lens members forming an objective lens. A photographing device is provided for so-called instant pictures which are derived from the imaging and from the picture content, respectively. For the performance of the photographing of any instant picture respectively, there is provided a device for the aperture reduction of the projection system, which device increases the image sharpness on the light-sensitive layer of the instant picture to be exposed, which device is effective only during the photographing, and respectively, during the exposure, whereby the light-sensitive layer of the instant picture preferably is only arranged in the focal plane of the projection system during the photographing. Under the circumstances, for performing the photographing of an instant picture, a filter can be brought into the beam path at least to the light-sensitive layer of the instant picture, which filter increases the color temperature of the light of the projection light source.

REFERENCES:
patent: 3698807 (1972-10-01), Weigl
patent: 3740136 (1973-06-01), Maloney et al.
patent: 4082466 (1978-04-01), Driscoll et al.
patent: 4101213 (1978-07-01), Laskowski et al.

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