Digital complex holography using a shearing interferometer: improvements and recent results

Armando Albertazzi Jr.; Analucia Vieira Fantin

doi:10.1117/12.516574

27 May 2003 Digital complex holography using a shearing interferometer: improvements and recent results

Armando Albertazzi Jr., Analucia Vieira Fantin

Proceedings Volume 4933, Speckle Metrology 2003; (2003) https://doi.org/10.1117/12.516574
Event: Speckle Metrology 2003, 2003, Trondheim, Norway

Abstract

The authors introduced in 2002 a different approach to record a digital complex hologram. A phase-shifting shearing interferometer is used in such a way that no explicit reference wave is required. Twelve different images are acquired and three phase difference patterns are calculated: (a) the phase difference between the two wave fronts with no shearing, (b) the phase difference between two neighbor pixels in the x direction and (c) the phase difference between two neighbor pixels in the y direction. This information is combined to compute the amplitude and phase components of each pixel of the digital complex hologram. A plane wave is used to remove imperfections of the optical components and misalignment errors. In this mean time a new phase propagation algorithm was developed and some advances were achieved in the experimental side. The quality of the complex digital hologram was dramatically improved as well as the reconstructed image. This paper presents the recent progress and results and analyses some possibilities to apply this technique in non-isolated environment.

Citation Download Citation

Armando Albertazzi Jr. and Analucia Vieira Fantin "Digital complex holography using a shearing interferometer: improvements and recent results", Proc. SPIE 4933, Speckle Metrology 2003, (27 May 2003); https://doi.org/10.1117/12.516574

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