Optical: systems and elements – Lens – With light limiting or controlling means
Reexamination Certificate
2006-10-24
2006-10-24
Spector, David N. (Department: 2873)
Optical: systems and elements
Lens
With light limiting or controlling means
C355S053000, C355S071000, C355S077000
Reexamination Certificate
active
07126766
ABSTRACT:
An optical stop unit includes plural light blocking plates, and a cam mechanism for driving the plural light blocking plates to vary an aperture diameter, the cam mechanism including a cam follower and a cam groove, wherein the cam follower and cam groove have mutually facing surfaces, through which the cam follower and cam groove contact each other, and at least one of which surfaces has a curved section that is substantially perpendicular to a plane formed by the plural light blocking plates.
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Japanese Office Action dated Sep. 6, 2005 with English translation.
Canon Kabushiki Kaisha
Morgan & Finnegan. LLP
Spector David N.
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