Arbitrary shape surface Fresnel diffraction

Details Arbitrary shape surface Fresnel diffraction Arbitrary shape surface Fresnel diffraction

2012-03-15

arxiv.org/abs/1203.3583v1

Physics

Optics

Scientific paper

Fresnel diffraction calculation on an arbitrary shape surface is proposed. This method is capable of calculating Fresnel diffraction from a source surface with an arbitrary shape to a planar destination surface. Although such calculation can be readily calculated by the direct integral of a diffraction calculation, the calculation cost is proportional to $O(N^2)$ in one dimensional or $O(N^4)$ in two dimensional cases, where $N$ is the number of sampling points. However, the calculation cost of the proposed method is $O(N \log N)$ in one dimensional or $O(N^2 \log N)$ in two dimensional cases using non-uniform fast Fourier transform.

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