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本文介绍研制旋转式线性可变减光板的三种简易方法.这种中性减光板在0～320度范围透过率为0—100%连续变化(透过率最大处作为100%),亦即减光膜在0～320度范围内线性变化.
This article describes three easy ways to develop a rotating linear variable attenuator that continuously varies from 0 to 100% over a range of 0 to 320 degrees (100% at the maximum) That is, the light-reducing film linearly changes from 0 to 320 degrees.