同时，由透射光场的格林函数积分得出了基尔霍夫近似下光场的表达式。

We also obtain the expression for the transmissive light waves from the Green 's-function integral in the case of Kirchhoff's approximation.

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以动态光散射（DLS）、透射电子显微镜（TEM）和场发式扫描电子显微镜（FESEM）等对各阶段乳液聚合的胶粒大小和分布以及形态结构进行了表征。

The sizes and their distributions as well as morphologies of polymer microspheres at various emulsion polymerization steps were characterized by means of DLS, TEM and FESEM.

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