CPC G02B 27/646 (2013.01) [G02B 7/023 (2013.01); G02B 7/026 (2013.01); G02B 7/08 (2013.01); G03B 5/00 (2013.01); G03B 2205/0007 (2013.01)] | 18 Claims |
1. An optical device actuator, comprising:
a fixed frame;
a guide shaft that is held by the fixed frame;
a movable frame configured to move along the guide shaft;
a driver configured to move the movable frame relative to the fixed frame along the guide shaft; and
a vibration imparting unit configured to impart vibration to the guide shaft,
wherein, if we let α be the acceleration of the vibration imparted by the vibration imparting unit to the guide shaft, mk be a mass of the movable frame, and T be a frictional force acting between the guide shaft and the movable frame,
the vibration imparting unit imparts the vibration to the guide shaft so as to satisfy a following relational expression (1):
T<α×mk (1)
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