| Summary: | 碩士 === 國立成功大學 === 機械工程學系碩博士班 === 93 === The purpose of this paper is to analysis the relationship of object light, optical system and image by Fourier optical.We will discuss the produce of Modulation Transfer Function, and derive MTFmathematic model and its physical meaning.
MTF is an important norm of optical system efficiency. In this paper, we will explain MTF test patterns and the meaning of MTF graph, and use several mathematic theorems to describe rays' advance and the diffraction condition after rays through optical system. In different conditions, measurement and count of MTF are different;we will discuss that in this paper, too.
In this paper, we will use pupil function to explain how MTF produce is and its count methods, we also use ray tracing to trace rays of optical system and get the spot diagram of image plane. We will use spot diagram to count line spread function, then we can get the MTF of optical system.
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