| abstract |
A lens holder ( 16 ) is attached to a processing target lens ( 2 ) such that a holder center (O) coincides with a processing center position ( 21 ) of the lens. An axial deviation measuring mark ( 81 a, 81 b ) is displayed on the processing target lens ( 2 ) to coincide with a reference position mark ( 80 a, 80 b ) of the lens holder ( 16 ), and the circumferential surface of the processing target lens ( 2 ) undergoes primary processing. After primary processing, the axial deviation of the processing target lens ( 2 ) is measured from the reference position mark ( 80 a, 80 b ) and axial deviation measuring mark ( 81 a, 81 b ). When axial deviation exists, the lens holder ( 16 ) is removed from the processing target lens ( 2 ) and the processing target lens ( 2 ) is held again, so that the axial deviation is corrected. After that, the processing target lens ( 2 ) undergoes secondary processing. |