Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2011-06-07
2011-06-07
Mack, Ricky L (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S813000
Reexamination Certificate
active
07957073
ABSTRACT:
A lens apparatus includes a first lens unit and a second lens unit each of which is configured to move in an optical axis direction, a first cam tube that includes a first cam part and a second cam part respectively on an outer circumferential surface and an inner circumferential surface and moves the first and second lens units respectively in the optical axis direction using the first and second cam parts as the first cam tube rotates around an optical axis, and a linearly moving guide tube that is arranged on an inner circumferential side of the first cam tube and configured to guide the first and second lens units in the optical axis direction.
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Canon Kabushiki Kaisha
Canon U.S.A, Inc. IP Division
Jones James C
Mack Ricky L
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