| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens meter by which variation of power of a fixed focal lens is measured to easily understand the variation of the power. <P>SOLUTION: A lens meter includes a measurement optical system with a measurement index of a predetermined pattern arranged centering around a measurement optical axis in order to measure deflection power distribution of a lens which is located in a predetermined measurement area, and a light receiving element which receives light of an index image by measurement light fluxes which pass the lens and the measurement index, and measures deflection power of the fixed focal lens, and includes: measurement power calculation means for calculating first deflection power of an optical center position of the fixed focal lens and deflection power distribution of a peripheral position of the optical center based on the index image whose light is received by the light receiving element; variable power distribution calculation means for using the first deflection power as reference power to calculate power distribution of relative variation of deflection power distribution to the reference power; and output means for outputting the variable power distribution calculated by the variable power calculation means. <P>COPYRIGHT: (C)2012,JPO&INPIT |
