Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Koji Kawaguchi0
Date of Patent
August 25, 2009
0Patent Application Number
114732440
Date Filed
June 23, 2006
0Patent Primary Examiner
Patent abstract
A lens tube includes a lens guiding frame, a main unit, and a position detecting device. The lens guiding frame holds a zoom lens. The main unit holds the lens guiding frame to be movable in a direction of an optical axis with the zoom lens. The position detecting device detects a position of the zoom lens held in the main unit. The position detecting device includes an optical sensor and a detection target member. The detection target member includes a sensor cut unit and a sensor cover unit. The sensor cut unit is detected by the optical sensor. The sensor cover unit covers the optical sensor and the sensor cut unit during the detection.
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