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Chapter 4:
Diffraction Integral and Wave-Front Aberration Function
Discussions in earlier chapters have already indicated that the optical transfer function is mathematically related to the diffraction integral, the wave-front aberration function, and the spread function. This chapter is concerned with the diffraction integral and the wave-front aberration function (frequently shortened to wave-front aberration, wave aberration, aberration function, wave aberration function, wave-front distortion, or wave distortion depending on the emphasis and context). To contribute to a complete mathematical description of an optical system output, the wave-front aberration function is made part of the pupil function, which will also be discussed in this chapter.
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