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Browse Prior Art Database

REDUCTION/ENLARGEMENT GRADIENT INDEX LENS ARRAY

IP.com Disclosure Number: IPCOM000025334D
Original Publication Date: 1984-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 74K

Publishing Venue

Xerox Disclosure Journal

Abstract

Figure 1 discloses a gradient index lens array 10 comprising a plurality of gradient index fibers 10, lo2 .. 10 tilted with respect to their optical axes to provide a characteristic fanfold conbhguration. The array is positioned so as to transmit images from an object plane 12 to an image plane 14 at some magnification less than unity. The fiber array faces 16, 18 are circular and have centers of curvature which lie on the center line of the array. The faces of the fibers have been formed so as to provide a degree of curvature in a direction perpendicular to the length direction of the array as shown in Figure 2. The simplest case is to use sections of a circle; the faces of the array would then lie on a toroidal surface since a toroid is obtained mathmatically by rotating a circle and the planes containing the circle about a rotation point.

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XEROX DISCLOSURE JOURNAL

REDUCTION/ENLARGEMENT GRADIENT Proposed Classification INDEX LENS ARRAY
U.S. Michael M. Harrigan C1. 350/96.25
Int. C1. G02b 5/17

f

12

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A I /

14 L HG. /

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F/G. 2

FIG. 4

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F/G. 3

Volume 9 Number 5 September/October 1984

317

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

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REDUCTION/ENLARGEMENT GRADIENT INDEX LENS ARRAY (Con t'd)

Figure 1 discloses a gradient index lens array 10 comprising a plurality of gradient index fibers 10, lo2 .. 10 tilted with respect to their optical axes to provide a characteristic fanfold conbhguration. The array is positioned so as to transmit images from an object plane 12 to an image plane 14 at some magnification less than unity. The fiber array faces 16, 18 are circular and have centers of curvature which lie on the center line of the array. The faces of the fibers have been formed so as to provide a degree of curvature in a direction perpendicular to the length direction of the array as shown in Figure 2. The simplest case is to use sections of a circle; the faces of the array would then lie on a toroidal surface since a toroid is obtained mathmatically by rotating a circle and the planes containing the circle about a rotation point.

A variation of the shape of surface 16 and 18 is shown in the embodiment of Figure
3. In this configuration, aberrations are corrected for by shaping faces 16, 18 to follow a generally aspheric surface.

A stiIl further variation is shown in F...