Unwanted Astigmatism in Lenses with a Concentric Variation in Sagittal Power
Unwanted Astigmatism in Lenses with a Concentric Variation in Sagittal Power
复制标题
矢状度数同心变化的镜片中出现不必要的散光
DOI：
--
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发表时间：
1982
影响因子：
1.4
通讯作者：
W. Charman
中科院分区：
文献类型：
--
作者：
W. Charman
ABSTRACT A concentric variation in sagittal power, Fs, with zonal radius, y, has been used in some designs of varifocal and aphakic spectacle lenses. It is shown theoretically, using a paraxial approximation, that a gradient dFs/dy in sagittal power leads to the introduction of an amount y•dFs/dy of unwanted astigmatism. The validity of this result is illustrated experimentally.
