Exposure control for a reader-printer projection apparatus

Details Exposure control for a reader-printer projection apparatus Exposure control for a reader-printer projection apparatus

1994-10-28

1998-05-19

Braun, Fred L.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

355 69, 399144, G03B 1328

Patent

active

057542767

ABSTRACT:
An apparatus for projecting an original image onto a screen or a photosensitive drum includes a controller for correcting a light amount of an original illumination lamp along a scanning direction of the original image. A light amount correction value of the controller is changed so that exposure amount distribution on a projected surface becomes a predetermined value in accordance with a magnification detected from a projection lens.

REFERENCES:
patent: 4474460 (1984-10-01), Suzuki
patent: 4811055 (1989-03-01), Hirose
patent: 4970556 (1990-11-01), Iwata
patent: 5153638 (1992-10-01), Sakakibara
patent: 5164772 (1992-11-01), Andoh
patent: 5270771 (1993-12-01), Sato
patent: 5452047 (1995-09-01), Fujii et al.

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