| 摘要 |
PROBLEM TO BE SOLVED: To efficiently and stably center a lens in a lens centering machine. SOLUTION: The lens is centered by rotating at a high speed by sandwiching a surface A and a surface B of the lens W under low pressure by bell holders 1 and 2. After completing such centering, a side peripheral surface of the lens W is worked into a true circle by a grinding wheel 5 by reducing a rotating speed. The difficulty of centering and friction between the bell holders 1 and 2 are predicted by surface roughness and a centering factor on the basis of a shape of the lens W, and efficiency and stabilization of the centering action are attained by controlling a centering condition such as a centering rotating speed, centering time and lens sandwiching force at centering time. COPYRIGHT: (C)2004,JPO
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