Zoom lens

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G - Physics

02

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G02B 15/14 (2006.01) G02B 3/00 (2006.01) G02B 3/02 (2006.01) G02B 7/10 (2006.01) G02B 27/40 (2006.01)

Patent

CA 1321725

7166 ZOOM LENS ABSTRACT OF THE DISCLOSURE Zooming optical systems in which the effective focal length changes required for changing image scale and focus maintenance are brought about by movement of various system elements across the optical axis rather than along it as is the usual case. The zooming systems are suitable for use in a variety of applications including visual instrumentation and photographic systems.

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