介绍了渐变镜片的基本结构及工作原理，给出其基于狄利克雷条件的软设计方法。
The basic feature and principle of progressive addition lens (PAL) are introduced. Its soft design method based on Dirichlet principle was given.
介绍了渐变镜片的基本结构及工作原理，给出其基于狄利克雷条件的软设计方法。
The basic feature and principle of progressive addition lens (PAL) are introduced. Its soft design method based on Dirichlet principle was given.
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