Optical instrument, and method for optical instrument for preventing unexpected movement

摘要

An optical instrument of the present invention comprises a ring member which is arranged to be rotatable with respect to a lens barrel, and also to slide in an optical axis direction, a movement mechanism for slide movement of the ring member to a first position or a second position in the optical axis direction, an encoder that generates signals in accordance with a rotation operation of the ring member, a slide position determination section for determining positional change accompanying slide movement to the first position or the second position by the movement mechanism, and a control section for performing determination of the signals from the encoder to switch the display operation, and prohibiting switching of the display operation when the slide position determination section has determined a positional change accompanying the slide operation.

主权项

1. An optical instrument, comprising:
a ring member which is arranged to be rotatable with respect to a lens barrel, and also to slide in an optical axis direction; a movement mechanism for slide movement of the ring member to a first position or a second position in the optical axis direction, an encoder that generates signals in accordance with a rotation operation of the ring member; a position detection circuit for determining positional change accompanying slide movement to the first position or the second position by the movement mechanism; a clock counter, wherein responsive to a determination of a positional change of the ring member to the first position or the second position accompanying the slide movement, a value of the clock counter is reset, and otherwise, responsive to a determination of no positional change of the ring member to the first position or the second position accompanying the slide movement, a value of the clock counter is incremented, and
at least one controller CPU for halting processing corresponding to rotation of the ring member until a specified time has elapsed, as indicated by a value of the clock counter not exceeding a threshold even if the encoder has detected that the ring member has been rotated, and otherwise, carrying out processing corresponding to rotation of the ring member after a specified time has elapsed as indicated by a value of the clock counter exceeding a threshold.