Lens barrel and imaging device

Details Lens barrel and imaging device Lens barrel and imaging device

2011-07-26

2011-07-26

Mack, Ricky L (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S696000

Reexamination Certificate

active

07986468

ABSTRACT:
A lens barrel including: an imaging optical system; a tube configured to contain the imaging optical system; a holder configured to hold a lens included in the imaging optical system in the tube in such a way that the lens is movable along a direction of an optical axis of the imaging optical system; a sensor unit configured to output a cyclic detection signal whose peak value changes depending on a movement amount of the holder; a memory unit configured to store a relationship between peak values of the detection signal and a position of the holder in the direction of the optical axis in advance; and an arithmetic processor configured to calculate a position of the holder in the direction of the optical axis from a peak value of a detection signal detected by the sensor unit in movement of the holder based on the relationship stored in the memory unit.

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