Browse Prior Art Database

CONSTANT MAGNIFICATION ZOOM LENS FOR AUTO FOCUSING

IP.com Disclosure Number: IPCOM000023477D
Original Publication Date: 1977-Dec-31
Included in the Prior Art Database: 2004-Mar-31

Publishing Venue

Xerox Disclosure Journal

Abstract

This concept relates to a constant magnification zoom lens for auto focusing. In an apparatus where photographic slides are copied, it is observed that the plane of the transparency varies slightly from slide to slide. A lens which accurately