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A study of progressive addition lenses with reduced peripheral astigmatism adopting birefringent glass materials
Young-Jin Noh · Dal-Young Kim ∗
Department of Visual Optics, Seoul National University of Technology, Seoul 139-743 (Received 30 June 2009, in final form 24 December 2009)
The concept of a new kind of pregressive addition lens was developed by using a simulation study with the Zemax
TMlens design program adopting birefringent materials as lens glass. The results of the numerical analyses revealed that the astigmatism of birefringent (calcite) progressive addition lenses could be improved on the periphery by about 6 % as compared with general standard progressive addition lenses. From these results, if an appropriate form birefringence is used in the lens manufacturing process, improvement of optical quality of the progressive addition lenses can be expected.
PACS numbers: 42.25.Lc, 42.15.Fr, 42.79.Bh
Keywords: birefringence, astigmatism, progressive addition lenses
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