AUTO-FOCUS PRINTING BELOW 1,1 {33 {0 MAGNIFICATION

摘要

Automatic focusing is achieved for magnification factors ranging from above 1x through and below 1x by a mechanism which positions the negative with respect to the lens for a given magnification. The lens is positioned with respect to the image plane to establish the desired magnification. The negative holder is linked to the lens via a cam and follower which is configured to automatically establish the proper negative to lens spacing to maintain the system in focus.