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DIGITAL HOLOGRAPHY

Frequency analysis of digital holography

[+] Author Affiliations
Thomas M. Kreis

Bremer Institut fu¨r angewandte Strahltechnik—BIAS, Klagenfurter Str. 2, 28359 Bremen, Germany E-mail: kreis@bias.de

Opt. Eng. 41(4), 771-778 (Apr 01, 2002). doi:10.1117/1.1458551
History: Received June 19, 2001; Accepted Oct. 19, 2001; Online April 03, 2002
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A coherent optical imaging system consisting of recording a digital hologram by a CCD array and numerical reconstruction of the complex wave field in a computer is subjected to a frequency analysis. This analysis recognizes Fresnel and lensless Fourier transform holography; collimated and divergent reference waves; as well as the real image, the virtual image, and the dc term. The influences of finite sampling and the fill factor of the CCD pixels are examined. The impulse response of the system is a shifted Fraunhofer diffraction pattern of the aperture defined by the CCD. A fill factor below unity leads to a contrast decrease, which is quantitatively described in the modulation transfer function. © 2002 Society of Photo-Optical Instrumentation Engineers.

© 2002 Society of Photo-Optical Instrumentation Engineers

Citation

Thomas M. Kreis
"Frequency analysis of digital holography", Opt. Eng. 41(4), 771-778 (Apr 01, 2002). ; http://dx.doi.org/10.1117/1.1458551


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