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IMPROVED ILLUMINATION AND IMAGING SYSTEM FOR A LINEAR LIGHT GATE ARRAY

IP.com Disclosure Number: IPCOM000025344D
Original Publication Date: 1984-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 97K

Publishing Venue

Xerox Disclosure Journal

Abstract

In the accompanying drawing, a light gate array or light shutter 12 with polarizers 28 is illuminated by an aperture fluorescent lamp 14 through a condenser linear lens array 16, such as, for example, graded index fibers, SELFOC @ or striplens array. The lamp emits most of its actinic radiation through a relatively narrow aperture 20, where 0C is typically around 5 to 10 degrees about the light beam direction shown by arrowheads 18.

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XEROX DISCLOSURE JOURNAL

IMPROVED ILLUMINATION AND IMAGING SYSTEM FOR A LINEAR LIGHT GATE ARRAY Jerome E. May
Ned J. Seachman

Proposed Classification
U.S. CI. 355/65 Int. Cl. G03b 27/70

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In the accompanying drawing, a light gate array or light shutter 12 with polarizers 28 is illuminated by an aperture fluorescent lamp 14 through a condenser linear lens array 16, such as, for example, graded index fibers, SELFOC @ or striplens array. The lamp emits most of its actinic radiation through a relatively narrow aperture 20, where 0C is typically around 5 to 10 degrees about the light beam direction shown by arrowheads 18.

The radiation or light is either blocked or transmitted by the light shutter 12 in response to signals provided by external circuitry (not shown). The resulting pattern of light is imaged by the linear imaging lens array 22, usually at unit magnification, though this is not a requirement, onto a moving photodetector or photoreceptor 24 at the image plane 26. If the photoreceptor is, for example, a cylindrically shaped member, the image plane 26 is tangent thereto at the line of contact by the light direction 18 which is generally perpendicular to the image plane.

The configuration depicted in the drawing utilizes the fact that by making the exit

Volume 9 Number 5 September/October 1984 339

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IMPROVED ILLUMINATION AND IMAGING SYSTEM FOR A LINEAR LIGHT GATE ARRAY (Cont'd)

cone of light from the condenser lens array 16 match the input acceptance angle of the imaging lens array 22, the theoretical maximum transfer from lamp to image plane can occur. The lamp to condenser lens array dis...