Photocopying – Including fiber optics
Patent
1979-12-06
1982-02-23
Wintercorn, Richard A.
Photocopying
Including fiber optics
355 8, 355 11, 355 46, 355 50, 355 51, G03B 2700
Patent
active
043166652
ABSTRACT:
In a slit exposure type copying machine, a projection device basically includes transmission type element lens systems each including a lens having a great length in the direction of the optic axis thereof as compared with the effective diameter thereof. A part area of an original is projected upon a predetermined part area on an image plane and the light intensity distribution of the projected part area has a predetermined central area controlled by lens aperture eclipse and extending diametrically from at least the optic axis and a marginal area lying outwardly of the central area and weak in light intensity. A plurality of such element lens systems are substantially equidistantly arranged in the lengthwise direction of the slit in a plane perpendicular to the optic axis so that the marginal areas in at least the element lens systems are superposed upon one another. Further, the element lens systems are arranged in a plurality of rows so that each row is positioned just intermediate the adjacent row, whereby even if there is an error in the arrangement interval of the element lens systems, the uniformity, in the slit area, of the exposure amount time-integrated in the original scanning direction is maintained.
REFERENCES:
patent: 3580675 (1971-05-01), Hieber
patent: 3584952 (1971-06-01), Gundlach
patent: 3592542 (1971-07-01), Kaufer
patent: 4147412 (1979-04-01), Kawamura et al.
patent: 4168900 (1979-09-01), Adachi
patent: 4193679 (1980-03-01), Mochizuki et al.
patent: 4194827 (1980-03-01), Bleeker et al.
Matsui Yoshiya
Midorikawa Koyo
Minami Setsuo
Mochizuki Noritaka
Moriwaki Masazumi
Canon Kabushiki Kaisha
Wintercorn Richard A.
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