Phase-shifting digital holography and applications

Ichirou Yamaguchi

doi:10.1117/12.406353

15 December 2000 Phase-shifting digital holography and applications

Ichirou Yamaguchi

Proceedings Volume 4087, Applications of Photonic Technology 4; (2000) https://doi.org/10.1117/12.406353
Event: 2000 International Conference on Application of Photonic Technology (ICAPT 2000), 2000, Quebec City, Canada

Abstract

In digital holography holograms are recorded by a CCD camera and image reconstruction is performed by a computer that calculates the diffraction from the hologram. In phase-shifting digital holography an in-line setup is employed in the recording to reduce the spatial frequency spectrum of the hologram, and the distribution of complex amplitude on the CCD is directly derived by means of phase-shifting of the reference beam and subsequent analysis of hologram patterns to suppress the conjugate image. It uses a simple optical setup and delivers distributions of complex amplitude including both amplitude and phase in three-dimensional space without mechanical focusing. We apply this method to microscopy and to surface contouring in which phase distributions resulting from two different angles of incidence at a diffuse object are compared to deliver surface height.

Citation Download Citation

Ichirou Yamaguchi "Phase-shifting digital holography and applications", Proc. SPIE 4087, Applications of Photonic Technology 4, (15 December 2000); https://doi.org/10.1117/12.406353

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