For the transmissive mode, no achromatic quarter-wave film is needed.

在透射模式中，不需要消色差的四分之一波片。

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Wang Z P. Li Q B. Tan Q Novel method for the measurement of the retardance of a quarter-wave plate.

王政平。李庆波。欧阳春梅延迟片法测量光学玻璃电流传感头线性双折射。

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The directions can be obtained by removing the quarter-wave plate and following the procedure for plane polarized light or by interpolation.

可将四分之一波片卸去，并按平面偏振光法或内插法来决定其主应力方向。

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