Photocopying – Projection printing and copying cameras – Focus or magnification control
Patent
1978-09-12
1980-07-15
Moses, R. L.
Photocopying
Projection printing and copying cameras
Focus or magnification control
355 8, G03B 2770
Patent
active
042125324
ABSTRACT:
A slit exposure type copying apparatus capable of producing copies at various magnifications has a holder for holding an original to be copied in a stationary position at one end of an optical path, a photosensitive member at the other end of the optical path, an exposure slit through which portions of an image of the original are successively projected, the photosensitive member being movable past the exposure slit at a speed V, and a mirror structure having a first and second reflecting surfaces disposed perpendicular to each other, the second reflecting surface reflecting the successive portions of the image to the exposure slit and onto the photosensitive member through said slit. A replaceable stationary projection or a zoom lens is disposed between the holder for the original and the first reflecting surface, and the mirror structure is movable to scan the successive parts of the image of the original projected by the projection lens in a direction and having a velocity which has a velocity component V/2 perpendicular to the optical axis of the image striking the first reflecting surface and leaving the second reflecting surface, whereby the image can be projected at different magnifications without changing the speeds of movement of the photosensitive member and said first and second surfaces.
REFERENCES:
patent: 3884574 (1975-05-01), Dol et al.
patent: 4118118 (1978-10-01), Barto
patent: 4125323 (1978-11-01), Ikeda et al.
patent: 4126389 (1978-11-01), Ikeda et al.
patent: 4135812 (1979-01-01), Kingsland
Minolta Camera Kabushiki Kaisha
Moses R. L.
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