POSITION DETECTION DEVICE FOR MOVABLE LENS, LENS DEVICE, IMAGING DEVICE, POSITION DETECTION METHOD FOR MOVABLE LENS, AND POSITION DETECTION PROGRAM FOR MOVABLE LENS

摘要

A position detection device for a movable lens includes: a first position detection unit as defined herein; a storage control unit as defined herein; a second position detection unit as defined herein; an output unit as defined herein; and a second sensor-state detection unit as defined herein, and the first position detection unit detects the first position based on a signal output from the first sensor at a timing determined in advance, and detects the first position again based on a signal output from the first sensor in an abnormality-recovery state in which the second sensor-state detection unit detects that the output signal of the second sensor is in the abnormal state and then detects that the output signal of the second sensor is in the normal state after the first position is stored in the storage unit.