| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a shift mechanism for an optical element which, though small, can quickly shift the optical element by a relatively large distance and also to provide an imaging device and an endoscope system.SOLUTION: When power is supplied to piezoelectric elements 52, the two piezoelectric elements 52 elongate by the same amount, but since notches are spread out at this time, oscillation occurs, so that the angle of link parts 51a holding the notches therebetween widens. Since a rectangular frame 51 deforms such that the notches become narrower, the distance between installation parts 51h becomes wider. Thus the objective optical system 24 instantaneously displaces in an oblique direction of a CCD (with respect to a pixel sequence). The amount of the displacement is more than five times the elongation amount of the piezoelectric elements 52. When the power supply is stopped, the piezoelectric element 52 contracts, so that the rectangular frame 51 restores to the original state.</p> |
