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OPTICAL SCANNING

IP.com Disclosure Number: IPCOM000024147D
Original Publication Date: 1979-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 158K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a scanning system of a copying machine, a conventional catadioptic lens is replaced by a Fresnel catadioptic lens 1. This makes the effective aperture of the system larger and a low wattage lamp can be used. Fresnel elements also tend to be cheaper than spherical lenses. A half-rate scanning system is shown which has a

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XEROX DISCLOSURE JOURNAL

OPTICAL SCANNING ProposedEdric Raymond Brooke Classification

U.S. Cl. 355/8 Int. CL G03g 15/28

In a scanning system of a copying machine, a conventional catadioptic lens is replaced by a Fresnel catadioptic lens 1. This makes the effective aperture of the system larger and a low wattage lamp can be used. Fresnel elements also tend to be cheaper than spherical lenses. A half~rate scanning system is shown which has a

platen 2, full-~ratemirror 3, half ~rate mirror 4, and exposure slit 5.

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Volume 4 Number 5 September/October 1979 659

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[This page contains 1 picture or other non-text object]