Abstract: A photosensor circuit of the present invention comprises (i) a plurality of light receiving elements for detecting incident light; (ii) a plurality of output terminals for outputting photocurrents generated in the plurality of light receiving elements; (iii) a plurality of switches for selecting connection between the light receiving element and the output element in all combinations of the plurality of light receiving elements and the plurality of output terminals; and (iv) a shift register comprised of a plurality of nodes each controlling on/off of the plurality of switches. In this arrangement, when data of off or on is input into the plurality of nodes constituting the shift register, the switches corresponding to the nodes receiving the data of off are set to be off, and the switches corresponding to the nodes receiving the data of on are set to be on.

Abstract: A movement device, which moves an object with high accuracy and with little effect or wear on frictional surfaces. A first pair of piezoelectric elements are fixed to a base such that they expand and contact in a relative movement direction. A second pair of piezoelectric elements are fixed to the base such that they expand and contract in a direction perpendicular to the relative movement direction. A first vibrating body is connected to the first piezoelectric elements. A second vibrating body is positioned such that it does not contact the first vibrating body and moves in a predetermined direction relative to the base when the second vibrating body and the object lose contact. The second vibrating body and the object come in contact, and the first vibrating body and the object lose contact when the vibrating body moves in an opposite direction to the predetermined direction.