Image exposing device

Details Image exposing device Image exposing device

1997-11-17

1999-06-29

Lee, Eddie C.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 35, G03B 2732, G03B 2772

Patent

active

059175770

ABSTRACT:
An image exposing device which, on the basis of image data, modulates light beams outputted from three light sources having respectively different wavelengths, and which scans/exposes the light beams onto a photosensitive material. The three light sources includes a first light source having a light-emitting peak wavelength in a vicinity of 635 nm, a second light source having a light-emitting peak wavelength in a range of 670 to 710 nm, and a third light source having a light-emitting peak wavelength in a vicinity of 780 nm. The photosensitive material includes a first photosensitive layer having a peak spectral sensitivity corresponding to the first light source, a second photosensitive layer having a peak spectral sensitivity corresponding to the second light source, and a third photosensitive layer having a peak spectral sensitivity corresponding to the third light source. A sensitivity of the first photosensitive layer with respect to the first light source is at least fifteen times a sensitivity of the second photosensitive layer with respect to the first light source, and a sensitivity of the second photosensitive layer with respect to the second light source is at least fifteen times a sensitivity of the first photosensitive layer with respect to the second light source.

REFERENCES:
patent: 5415978 (1995-05-01), Asami et al.
patent: 5496689 (1996-03-01), Ogawa
patent: 5508161 (1996-04-01), Miyake et al.
patent: 5573894 (1996-11-01), Kodama et al.

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