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OPTICAL STYLUS PRINTER

IP.com Disclosure Number: IPCOM000025095D
Original Publication Date: 1983-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 100K

Publishing Venue

Xerox Disclosure Journal

Abstract

As shown in Figures 1 and 2, a large scale light valve 11 for electro-optic line printing may be formed by seating an electro-optic crystal 12 on or closely adjacent a plurality of individually addressable electrodes 135 - 13i which are deposited on, say, a printed circuit board 14. For example, a printed c k u i t stylus array, such as used in some electrographic stylus printers, may be employed to control the light valve 11.

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XEROX DISCLOSURE JOURNAL

OPTICAL STYLUS PRINTER Proposed Robert A. Sprague Classification

U.S. C1. 350/356 Int. Cl. G02f 1/03

IC

2

Volume 8 Number 4 July/August 1983 327

FIG

FIG

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OPTICAL STYLUS PRINTER (Cont'd)

As shown in Figures 1 and 2, a large scale light valve 11 for electro-optic line printing may be formed by seating an electro-optic crystal 12 on or closely adjacent a plurality of individually addressable electrodes 135 - 13i which are deposited on, say, a printed circuit board 14. For example, a printed ckuit stylus array, such as used in some electrographic stylus printers, may be employed to control the light valve 11.

Due to the increased scale of the light valve 11, its radiometric requirements for printing on a conventional photosensitive recording medium, such as a xerographic drum 15, are reduced. For example, the light valve 11 may be illuminated for a total internal reflection (TIR) mode of operation by a tungsten strip lamp 16.

If the crystal 12 is disposed between a pair of crossed polarizers 17 and 18, each of which is oriented at 45 degrees with respect to the longitudinal axis 19 of the crystal 12, a relatively simple optical system may be used. Indeed, in that event, an elongated cylinder lens 21, which is selected to bring the light that is totally internally reflected by the crystal 12 to a line focus on the drum 15, will cause a shadow .image of the light valve 11 to be formed on the drum 15. Alternativelv, as shown in Figures 3 and 4, Sch...