WIDE ANGLE ADD LENS REDUCTION SYSTEMS
Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
The current state of the art of imaging systems provides two general methods of varying image size. One is to vary the overall object to image distance and move the (fixed focal length) lens to obtain sharp imagery. The second is to keep the overall object to image distance fixed and vary the focal length (and position) of the lens to provide sharp imagery.