Abstract: A centering device (13) is arranged to surround a loading table (11) on which a lens blank (1) is to be set, to set the geometric center of the lens blank (1) to coincide with the center of the loading table (11). The centering device (13) includes three clamp pins (31) which press the peripheral surface of the lens blank (1). When centering is ended, the loading table (11) on which the lens blank (1) is set is pushed up by a moving device (12) from a centering position (H1) to a block position (H2), and a peripheral portion of the lens blank (1) on a concave surface side is urged against the lower surfaces of locking portions (31A) of clamp pins (31). After a predetermined amount of wax (4) is dripped onto the lens blank (1), a lens holding unit (2) is moved downward by a predetermined amount and urged against the wax on the lens blank (1) to spread the wax thin and let the wax to solidify. Thus, the lens blank (1) and lens holding unit (2) are bonded to each other.

Abstract: The object of the present invention is to enable efficient vibration processing by applying a sufficient displacement amount and response speed to an object to be vibrated. In grinding of an outer surface of a workpiece W, first and second supporting members are provided for supporting two opposed points of the workpiece, and first and second vibrators comprising a plurality of piezoelectric elements are arranged in blind holes formed in the center of the first and second supporting members. The first and second vibrators are activated with sine wave signals which differ in phase by 180 degrees so as to cause the first and second supporting members to expand and shrink in the back-and-forth direction. The displacement amount is amplified and the processing is performed. Also, the second supporting member can move back and forth toward the first supporting member.