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ALTERNATE OPTICAL PATH IMAGING

IP.com Disclosure Number: IPCOM000024275D
Original Publication Date: 1980-Feb-29
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 64K

Publishing Venue

Xerox Disclosure Journal

Abstract

A photocopying optical system having a dual optical path is shown in the figure. The elements which provide a first scanning path for an object to be imaged from platen 2 to xerographic drum 3 include scanning mirrors 4 and 6, lens 8 and imaging mirror 10. Lens 8 has a reflective element 12 at its center of symmetry, and in this first imaging mode, the lens acts as a half lens.

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'EROX A DISCLOSURE JOURNAL

ALTERNATE OPTICAL PATH IMAGING Proposed David K. Shogren Classification

U.S. CI. 355/8

- Int. CI. G03g 15/28

2 /,- 2'

  d t 1
I I

A photocopying optical system having a dual optical path is shown in the figure. The elements which provide a first scanning path for an object to be imaged from platen 2 to xerographic drum 3 include scanning mirrors 4 and 6, lens 8 and imaging mirror 10. Lens 8 has a reflective element 12 at its center of symmetry, and in this first imaging mode, the lens acts as a half lens.

A second optical path for an object placed on auxiliary platen 2' is provided via scanning mirrors 4', 6', 7, lens 8 (with element 12 moved out of the lens aperture to the dotted position) and mirror 10.

An alternative configuration for lens 8 is to replace reflector element 12 with a semi-ref lecting element (beam splitter). In this case, information from platen 2 and 2' could be delivered simultaneously to drum 3. In operation, fixed format information could be derived from platen 2 while variable information is scanned on platen 2'.

It is not essential that symmetrical lens designs are used. Where different focal lengths or magnifications are desired, the lens could be nonsymmetrical provided that through appropriate design the aberration in each lens sections is separately minimized.

Volume 5 Number 1 January/February 1980 93

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