基础。
参考文献：
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Comparison between Scalar Theory and Vector Theory for Imaging System in Optics Course
GENG Tao，JIA Hong-zhi
（School of Optical-Electrical and Computer Engineering，University of Shanghai for Science and Technology，Shanghai 200093，China）
Abstract：There are two purposes for this paper. The first is to let the students know the application scope of scalar diffraction theory for imaging system. The second is to introduce the students to the vector diffraction theory. In this paper，both scalar diffraction theory （the Fresnel diffraction） and vector theory （based on Debye approximation） are used to discussed the same imaging system. The results show that when the numerical aperture is less than 0.4，the scalar diffraction theory can be used well.
Key words：scalar diffraction theory；vector diffraction theory；imaging theory
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