Variable magnification projection system

Details Variable magnification projection system Variable magnification projection system

G - Physics

02

B

314/27, 95/33, 8

G02B 15/14 (2006.01) G02B 13/24 (2006.01) G02B 17/02 (2006.01) G02B 27/18 (2006.01) G03B 27/52 (2006.01) G03G 15/041 (2006.01)

Patent

CA 1039093

ABSTRACT OF THE DISCLOSURE An optical system for projecting an image of an object, operating between fixed object and image planes. Both the object conjugate and the image conjugate are variable to vary the magnification in the system. This is accomplished without moving the optical axis by means of a first roof mirror on the object side of the lens and a second roof mirror on the image side of the lens. These mirrors each fold the optical axis by 90° and are movable along a locus at 45° to the optical axis to change the object and image distances.

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