Driving apparatus, and lens apparatus and image pickup apparatus including the same

摘要

Provided is a driving apparatus for driving a movable optical member, the driving apparatus being removably attached to a lens barrel, the driving apparatus including: a rotary absolute position detector detecting a position of which the movable optical member, the rotary absolute position detector outputting an output value having a unique value with respect to a rotation angle within a range of a single rotation, and the output value having a point of discontinuity at which the output value is discontinuous every single rotation; and a controller performing boundary processing that handles the output value, corresponding to a driving range of the movable optical member, of the rotary absolute position detector having the point of discontinuity as a continuous value.

主权项

1. A driving apparatus for driving an optical member of a lens barrel, the driving apparatus comprising:
a rotation detector configured to rotate in conjunction with a rotation of a rotational member that rotates in conjunction with a driving of the optical member to detect a rotational amount of the rotational member, and output a unique value in accordance with a rotation angle of the rotation detector within a range of a single rotation, wherein a change of an output value from the rotation detector in response to a change of rotation amount of the rotation detector is discontinuous once in every single rotation, and wherein the optical member has a driving range corresponding to a rotation amount smaller than a single rotation of the rotation detector; and a controller configured to:
output an output value after adding a predetermined value to the output value of the rotation detector in a case where a position of the rotation detector in a rotational direction is on one side with respect to a position at which the change of the output value from the rotation detector in response to the change of rotation amount of the rotation detector is discontinuous; andoutput an output value without adding the predetermined value to the output value of the rotation detector in a case where the position of the rotation detector in the rotational direction is on the other side with respect to the position at which the change of the output value from the rotation detector in response to the change of rotation amount of the rotation detector is discontinuous.