Browse Prior Art Database

FEEDBACK LIGHT AMPLIFIER

IP.com Disclosure Number: IPCOM000023490D
Original Publication Date: 1977-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 292K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method for modifying the image produced from original input by a RUTICON-type optical display apparatus comprises direc-ting at least a portion of the image through an optical feed-back arrangement in order to provide subsequent input to the optical display apparatus. The image is modified by the subsequent input. The modification can include changes in the feedback portion of the image in order to alter the final optical output signal.

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XEROX DISCLOSURE JOURNAL

FEEDBACK LIGHT AMPLIFIER Richard F. Bergen
Joel H. Pollack

Proposed Classification

U.S. Cl. 350/167
mt. Cl, G02b 27/00

A method for modifying the image produced from original input
by a RUTICON-type optical display apparatus comprises direc-
ting at least a portion of the image through an optical feed-
back arrangement in order to provide subsequent input to the
optical display apparatus. The image is modified by the
subsequent input. The modification can include changes in the
feedback portion of the image in order to alter the final
optical output signal.

One of many useful devices for performing this image-modifying
method is shown schematically in the drawing. Original image
1 is addressed onto reflection-type recorder 2 (such as a
RUTICON device) through lens 3, and a phase image is developed
on the surface of recorder 2. Radiation from readout illumin-
ation source 4 is focused through lens 5 onto the deformed
surface of recorder 2 and reflected therefrom through lens 6~
stop 7, lens 8 and onto mirror 9.

9

2

1/

Volume 2 Number 6 November/December 1977 101

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

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FEEDBACK LIGHT AMPLIFIER (Cont~d)

Stop 7 lets only the zero order reflected light pass. The
image modulated radiation incident upon mirror 9 is directed
through shutter and/or variable density filter 10 and onto
mirror 11. From mirror 11 the feedback image is directed
through lens 12 onto mirror 13 and then to the input side of
recorde...