Rectangular focus spots with uniform intensity profile formed by computer-generated holograms

Jens Hossfeld; Erwin Jaeger; Theo T. Tschudi; Evgeny G. Churin; Voldemar Petrovich Koronkevich

doi:10.1117/12.50121

1 October 1991 Rectangular focus spots with uniform intensity profile formed by computer-generated holograms

Jens Hossfeld, Erwin Jaeger, Theo T. Tschudi, Evgeny G. Churin, Voldemar Petrovich Koronkevich

Proceedings Volume 1574, Intl Colloquium on Diffractive Optical Elements; (1991) https://doi.org/10.1117/12.50121
Event: International Colloquium on Diffractive Optical Elements, 1991, Szklarska Poreba, Poland

Abstract

An optical beam shaping system based on a single Computer Generated Hologram has been realized. It focuses a laser beam with Gaussian profile to a square area with uniform intensity. In order to achieve a rectangular focal spot which is as close as possible to the size of the diffraction spot, we investigated two different hologram calculation methods. The first is based on a ray tracing approach, while the second one uses an iterative Fourier transform algorithm. Computer simulations and experimental results are shown.

Citation Download Citation

Jens Hossfeld, Erwin Jaeger, Theo T. Tschudi, Evgeny G. Churin, and Voldemar Petrovich Koronkevich "Rectangular focus spots with uniform intensity profile formed by computer-generated holograms", Proc. SPIE 1574, Intl Colloquium on Diffractive Optical Elements, (1 October 1991); https://doi.org/10.1117/12.50121

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