Various central results of Fourier optics, some of which are explained in this introductory article, are highly useful for developing a deeper qualitative understanding of light propagation.īesides, for you optics methods allow for accurate quantitative calculations in many cases – particularly when using numerical tools. Therefore, Fourier optics is applicable to a wide range of cases of practical interest. Such methods are mostly restricted to situations where light propagates essentially in one direction however, the paraxial approximation (substantially limiting the angular range) is often not required, and certain extensions for bidirectional propagation are also possible. in optical instruments like microscopes, taking into account its wave nature (in contrast to geometrical optics).īoth refractive and diffractive optics can be investigated with Fourier optics. The purpose of Fourier optics is essentially to calculate and analyze how light propagates e.g. The corresponding calculations, which often involve one-dimensional or two-dimensional integrals, can sometimes be done with purely analytical means.įourier methods are also widely used for numerical computations. In wave optics, one often applies mathematical methods which include transverse spatial Fourier transforms, and are thus called methods of Fourier optics. How to cite the article suggest additional literature Encyclopedia > letter F > Fourier optics Fourier Opticsĭefinition: the description of light propagation based on transverse spatial Fourier transforms
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