Multiple-focus CGHs for producing light patterns in the near field

Andrei L. Mikaelian; Sergei A. Prokopenko; Aleksandr N. Palagushkin

doi:10.1117/12.429458

4 June 2001 Multiple-focus CGHs for producing light patterns in the near field

Andrei L. Mikaelian, Sergei A. Prokopenko, Aleksandr N. Palagushkin

Proceedings Volume 4296, Practical Holography XV and Holographic Materials VII; (2001) https://doi.org/10.1117/12.429458
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

The paper considers the computation and fabrication of computer-generated phase holograms (CGH) that can produce specific light patterns in the near field of diffraction. It is shown that: 1) near-field elements do not have periodic phase structures and have to be recalculated each time the geometrical parameters and wavelength change; 2) short-focus elements require a lot of calculations because the step of the sampling grid used in computation should be less than the smallest feature of the phase structure. Performance simulation of multifocus CGHs is done both symmetric and asymmetric 1D/2D output intensity distributions. The fabrication technology is described. Comparison between experiment and simulation is made.

Citation Download Citation

Andrei L. Mikaelian, Sergei A. Prokopenko, and Aleksandr N. Palagushkin "Multiple-focus CGHs for producing light patterns in the near field", Proc. SPIE 4296, Practical Holography XV and Holographic Materials VII, (4 June 2001); https://doi.org/10.1117/12.429458

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