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Browse Prior Art Database

DUAL MODE IMAGING SYSTEM

IP.com Disclosure Number: IPCOM000024094D
Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 360K

Publishing Venue

Xerox Disclosure Journal

Abstract

The copy rate of a machine depends on the process speed. Rescan time is minimized to optimize copy rate for given process speed imposing serious dynamic stresses on the scan system. As a means for maintaining throughput and minimizing stress, several systems have been proposed that provide means for simultaneously imaging two distinct images upon the photoreceptor. These systems utilize either optical beam splitters with the inherent light loss or two lenses with significantly higher cost and complication to the system. This proposal will show how to accomplish the same goal with a single lens and a shared optical path.

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XEROX DISCLOSURE JOURNAL

DUAL MODE IMAGING SYSTEM Proposed Classification
D. C. Bliek U.S. Cl. 355/46 David K. Shogren mt. Cl, G03b 27/44

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BIL F

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LENS APERTURES CLEAR REFLECTING

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The copy rate of a machine depends on the process speed. Rescan time is minimized to optimize copy rate for given process speed imposing serious dynamic stresses on the scan system. As a means for maintaining throughput and minimizing stress, several systems have been proposed that provide means for simultaneously imaging two distinct images upon the photoreceptor. These systems utilize either optical beam splitters with the inherent light loss or two lenses with significantly higher cost and complication to the system. This proposal will show how to accomplish the same goal with a single lens and a shared optical path.

FIG. 2

Volume 4 Number 4 3uly/August 1979 545

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

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DUAL MODE IMAGING SYSTEM (Cont'd)

Referring to Figure 1, the first optical path is defined by A, B, C, D, to G. This is a conventional full.~rate/half~ratesystem with half lens. The second path is common up to C then proceeds to E, F and H. For this case the full lens is provided and an open aperture in the mirror is utilized. To avoid absorption losses, the mirror is aluminized in a manner which provides equal, effective aperatures for each path, one reflecting and one transmitting, as seen in Figure 2. The configuration of the reflecting surface relative to clear surface is arbitrary; only the ratio of areas must be preserved. The system would also work with semi- reflecting surfaces on the mirror in the normal beam splitting sense. This system also works in reduction mode, the position indicated by the primes. In operation, mirrors A and B scan to A' and B' laying d...