Image reading apparatus

Details Image reading apparatus Image reading apparatus

1994-01-11

1996-08-20

Ramirez, Nestor R.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 67, 359679, G03B 2752

Patent

active

055483739

ABSTRACT:
An image reading apparatus which does not require lens replacement and which satisfies the requirements of Kohler illumination regardless of changes in projection magnification. The image reading apparatus comprising an image reading device having a predetermined length in the main scanning direction for transforming an optical image projected thereon into analog image signals, a light source, condenser elements having an aspherical effect in the main scanning direction, thereby satisfying the requirements for Kohler illumination, and projection lens for projecting an image of an original illuminated by the light source onto the image reading device. A motor can move the projection lens and its pupil along the optical axis.

REFERENCES:
patent: 4586814 (1986-05-01), Tokuhara et al.
patent: 4812021 (1989-03-01), Harrigan
patent: 4907865 (1990-03-01), Ichiki et al.
patent: 5046838 (1991-09-01), Iwasaki
patent: 5078487 (1992-01-01), Toyono et al.
patent: 5162844 (1992-11-01), Ueda

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