Claims )xccs'H  
1. A method of measuring centration of a lens, the method comprising: Y|Q(JX  
placing the lens on a platen, wherein the lens comprises a first major surface and a second major surface, wherein the first major surface is rotationally symmetrical about a first axis, and further wherein the first major surface comprises a first lens centration mark located at the intersection of the first major surface and the first axis, wherein placing the lens on the platen comprises placing the lens on the platen such that the first lens centration mark is aligned with a rotation axis of the platen; wpuK?fP  
leveling the lens relative to a plane of rotation that is orthogonal to the rotation axis of the platen; vRe 竹山县| 洱源县| 万安县| 会泽县| 临猗县| 沂南县| 普洱| 清丰县| 湘潭市| 柳林县| 垦利县| 于田县| 道孚县| 昌吉市| 永兴县| 纳雍县| 梧州市| 花莲市| 怀来县| 鲁甸县| 商丘市| 潮州市| 宁国市| 公主岭市| 东乌珠穆沁旗| 穆棱市| 林州市| 民丰县| 隆安县| 平武县| 枣庄市| 曲周县| 儋州市| 湖南省| 比如县| 宜阳县| 南乐县| 邹平县| 灌云县| 九龙城区| 兴隆县|