Scratch-suppressing scanning apparatus with aspherical lens

Details Scratch-suppressing scanning apparatus with aspherical lens Scratch-suppressing scanning apparatus with aspherical lens

1994-09-12

1996-03-26

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

359206, H01J 314

Patent

active

055023029

ABSTRACT:
A scanning apparatus for linewise reproducing an image on one face of a transparent image carrier onto light-sensitive means, which comprises support means (10) defining a support surface for the image carrier (12), an elongated light source (21b), a rod-like aspherical lens (23) disposed between said light source (21b) and said support means (10) for focussing said elongated light source onto an image carrier located on said support means, the characteristics of said lens (23) and its position with respect to said support means being such that the illuminating angle (.alpha.) of an image carrier on said support means (10) is at least 20 angular degrees and that light intensity variations over said angle are smaller than 15%, and an imaging lens (26) for forming an image of a scanned line (24) of an image on said carrier onto said light-sensitive means.

REFERENCES:
patent: 4872755 (1989-10-01), Kiichel

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