Digital holographic tomography of phase objects

Arun Anand; Vani K. Chhaniwal; Giancarlo Pedrini; Wolfgang Osten

doi:10.1117/12.827666

17 June 2009 Digital holographic tomography of phase objects

Arun Anand, Vani K. Chhaniwal, Giancarlo Pedrini, Wolfgang Osten

Proceedings Volume 7389, Optical Measurement Systems for Industrial Inspection VI; 73890L (2009) https://doi.org/10.1117/12.827666
Event: SPIE Europe Optical Metrology, 2009, Munich, Germany

Abstract

Digital holography is one of the most versatile tools for the whole field imaging of wavefronts. Since numerical reconstruction provides both the amplitude and phase of the wavefronts it finds immense potential applications ranging from shape measurement to microscopy. The method is useful especially for phase objects, which otherwise does not produce any change in the amplitude of the interacting wavefront and hence is difficult to image. The wavefronts passing through a region having non-uniform refractive index distribution will carry the information about this distribution as a spatially varying phase. Digital holography can be used for measurement of this phase. Here the use of digital holographic interferometry coupled with tomography is investigated for mapping of spatially as well as temporally varying refractive index distributions.

Citation Download Citation

Arun Anand, Vani K. Chhaniwal, Giancarlo Pedrini, and Wolfgang Osten "Digital holographic tomography of phase objects", Proc. SPIE 7389, Optical Measurement Systems for Industrial Inspection VI, 73890L (17 June 2009); https://doi.org/10.1117/12.827666

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