Image-forming apparatus having liquid crystal and photoconductiv

Details Image-forming apparatus having liquid crystal and photoconductiv Image-forming apparatus having liquid crystal and photoconductiv

1994-06-07

1996-06-18

Gross, Anita Pellman

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 71, 359 72, 359212, 359226, 355 71, G02F 1135, G02F 11335, G03B 2772, G02B 2608

Patent

active

055283926

ABSTRACT:
An image-forming apparatus for exposing a photosensitive material with image light. An optical modulation device is provided such that the intensity of image light made incident from one side of an optical modulator is modulated in correspondence with the intensity of the image light made incident from the other side of the optical modulator as well as a drive voltage to be applied, and the image light made incident from one side is made emergent from the optical modulator. Since the modulation of the intensity of the image light is effected by the optical modulator, the amount of exposure supplied to a printing paper is controlled in correspondence with the density distribution of the image on a negative film, and an image having appropriate contrast can be reproduced by effective use of the latitude of the printing paper.

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"Image Presentation Optical Systems With Local Spatial Modulation of Blinding Objects", Japan Display '92, A. P. Onoknov, J. N. Tanakin and M. G. Tomilin, 1992, pp. 543-545 (The Society for Information Display and The Institute of Television Engineers of Japan).
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