| 摘要 |
PURPOSE:To assure high precision polishing at all times by mounting a polishing holder having an elastic material attached to the tip end thereof, and thereby elastically holding a workpiece lens between a polishing dish and the polishing holder. CONSTITUTION:A polishing holder 2 having an elastic material 3 such as an O-ring provided on the tip end thereof is mounted in a holder shaft 1 via a holder spindle 4, which polishing holder serves to elastically hold a lens L with a polishing dish 14. An angular line of theta2 connecting a point (a) of a central portion of the polishing holder to which portion pressure is applied with a point (b) of an external contact part of the lens L is set to be smaller even in a horizontal state of the device than that of prior arts. In succession, the angle described above is substantially unchanged even if the device is moved transversely in rocking movement thereof, and hence pressure from the polishing holder 2 is uniformly applied over the whole surface of the lens L. In addition, the pressure is moderated by the elastic material 3, and thus rocking of the lens L such as fluttering is reduced for performing finishing polishing with high precision.
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