这个推论使平面干涉场梯度计算变得方便。

And this makes it more convenient for the calculation of the gradient of the plane interference field.

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但这并不意味着在梯度计算中不能使用伴随方法。

But this does not mean that the adjoint method can not be used to calculate the gradient.

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优化过程中，能量函数关于光学参数的梯度计算是关键，本文提出一种基于梯度树的梯度求解方法。

In the process of optimization, the gradient computation of the energy function with respect to optical parameters is critical, for which, an algorithm based on the gradient tree is put forward.

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