| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain detection accuracy using output from a light receiving element even in a case of receiving the influence of noise on a circuit or control for making a quantity of light constant has become transient. <P>SOLUTION: A shake correction device comprises: shake correction means displaced on a plane intersecting the optical axis of an optical system; light emitting means for emitting detection light used to detect a positional change on the plane due to the displacement of the shake correction means; light receiving means, displaced relative to the light emitting means, for receiving detection light and outputting first and second detection signals corresponding to the position relative to the light emitting means; and determining means for determining whether a detection difference has occurred between the first and second detection signals. In a case of the same phase in which an amount of change in the first detection signal and an amount of change in the second detection signal increase or decrease together according to a positional change, the determining means determines that a detection error has occurred. In a case of a different phase in which the amount of change in the first detection signal and the amount of change in the second detection signal increase or decrease according to a positional change such that they are reverse to each other, the determining means determines that detection error has not occurred. <P>COPYRIGHT: (C)2012,JPO&INPIT |
