Browse Prior Art Database

FOLDED PATH SEQUENTIAL SCREENING SHADOWGRAPH

IP.com Disclosure Number: IPCOM000024276D
Original Publication Date: 1980-Feb-29
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 57K

Publishing Venue

Xerox Disclosure Journal

Abstract

A screening shadowgraph for a copier optical system is shown in the figure. The device comprises a small lamp having a filament 2, parallel mirrors 4, 6, baffles 8, 10, a beam directing mirror 12 and a screen 14. The mirrors are masked in areas 4A, 6A to prevent overlapping of the beams creating, in effect, parallel rows of mirror segments 4', 6'.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

'EROX L DISCLOSURE JOURNAL

FOLDED PATH SEQUENTIAL SCREENING SHADOWGRAPH U.S. C1. 355/8
George R. Simpson
Joseph P. Taillie

Proposed Classification

Int. CI. G03g 15/28

\ f6

A screening shadowgraph for a copier optical system is shown in the figure. The device comprises a small lamp having a filament 2, parallel mirrors 4, 6, baffles 8, 10, a beam directing mirror 12 and a screen 14. The mirrors are masked in areas 4A, 6A to prevent overlapping of the beams creating, in effect, parallel rows of mirror segments 4', 6'.

Volume 5 Number 1 January/February 1980 95

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

Page 2 of 2

FOLDED PATH SEQUENTIAL SCREENING SHADOWGRAPH (Cont'd)

In operation, the portion of the light from filament 2 not blocked by baffles 8 and 10 falls onto a first mirror segment 4'. This beam is reflected from segments 4', 6' and caused to follow a folded path until it emerges to be reflected from mirror 12 to screen 14, which provides the desired modulation at the surface of a photoconductor 16. The folded path thus allows the device to be compactly constructed and without shortening the distance from source to screen 14.

96

   XEROX DISCLOSURE JOURNAL Volume 5 Number 1 January/February 1980

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