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Object characterization with refractometric digital holography

Publiceringsår: 2004
Språk: Engelska
Publikation/Tidskrift/Serie: Technical Report LUTEDX/(TEAT-7126)/1-6/(2004)
Volym: TEAT-7126
Dokumenttyp: Rapport
Förlag: [Publisher information missing]


We demonstrate a Digital Holographic method where two different substances

in a blend can be discerned. The method requires only one set of exposures

and one reconstruction in the plane of focus. The large scale phase variation

of the phase image is unwrapped by Flynn’s discontinuity algorithm to reveal

which regions in the sample the phase has decreased or increased upon

transmission of the illuminating wave. Objects with higher or lower index

of refraction than the mounting liquid can be detected as regions where the

phase has been shifted. We also present a method to calculate the volume

distribution of substrates in a sample. Experimental results of both methods

are demonstrated with crystals of NaCl and KCl.


  • Electrical Engineering, Electronic Engineering, Information Engineering


  • Electromagnetic theory-lup-obsolete

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