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IMAGING SYSTEM UTILIZING STATIONARY PLATEN AND MULTI-MAGNIFICATION GRADIENT INDEX LENS ARRAY ASSEMBLY

IP.com Disclosure Number: IPCOM000025220D
Original Publication Date: 1984-Feb-29
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 89K

Publishing Venue

Xerox Disclosure Journal

Abstract

Gradient index lens arrays have found wide usage in compact copiers by virtue of their relatively short (40-1 OOmm) conjugate requirements. The more conventional systems maintain the lens array in a fixed position and move the document through an exposure zone generally by means of a movable platen. If the platen is held stationary and the lens array moved, the velocity ratios between the lens array and the moving image recording sheet (photoreceptor) must be determined. In particular, when more than one lens array representing more than one magnifi-cation value is utilized, the precise ratio to be determined becomes more complex.

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XEROX DISCLOSURE JOURNAL

IMAGING SYSTEM UTILIZING STATIONARY PLATEN AND MULTI-MAGNIFICATION GRADIENT INDEX LENS ARRAY ASSEMBLY James D. Rees

Proposed Classification
U.S. C1. 355/8 Int. C1. G03g 15/28

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Gradient index lens arrays have found wide usage in compact copiers by virtue of their relatively short (40-1 OOmm) conjugate requirements. The more conventional systems maintain the lens array in a fixed position and move the document through an exposure zone generally by means of a movable platen. If the platen is held stationary and the lens array moved, the velocity ratios between the lens array and the moving image recording sheet (photoreceptor) must be determined. In particular, when more than one lens array representing more than one magnifi- cation value is utilized, the precise ratio to be determined becomes more complex.

An imaging system 10 is shown in the Figure. A document 12 is placed on the surface of a stationary, transparent platen 14. Gradient index scanning lens assembly 20 comprises a unity magnification lens 22, a .647 reduction lens 24, linear illumination lamp 26 and associated reflectors 28 and 30. Light reflected from the scan illumination strip is projected through either lens 22 or 24, as determined by appropriate shutter means (not shown) onto the surface of moving

Volume 9 Number 1 January/February 1984 51

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