Image read device with reduced mirror vibration

Details Image read device with reduced mirror vibration Image read device with reduced mirror vibration

1992-05-12

1993-05-18

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355236, 358474, 359872, G03G 1528

Patent

active

052125238

ABSTRACT:
An image read device in which an original document located on a platen glass is exposed to and scanned with a light from a light source, to obtain a light image representative of a picture on the original, and the light image is guided through an optical system including at least first to third mirror elements into an image pick-up unit, is improved in that the natural frequencies of the first to third mirror elements are different from each other. In the image read device, the thicknesses of the second and third mirror elements may be different from each other. Further, the thickness of the first mirror element may be larger than the width of the reflecting surface of the first mirror element as viewed in the slow scan direction.

REFERENCES:
patent: 4579448 (1986-04-01), Nowak et al.
patent: 5097290 (1992-03-01), Watanabe
patent: 5140443 (1992-08-01), Iwahara et al.

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