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- W2059860135 abstract "Digital holography means hologram recording by a CCD and image reconstruction by a computer. The conventional off- axis setup has limitations arising from much lower resolution of CCD than photographic materials. In phase- shifting digital holography employing an in-line setup complex amplitude at a CCD plane is directly detected by stepwise phase-shifting of the reference beam. The complex amplitude is then subject to Fresnel transformation to deliver complex amplitude in three-dimensional space. This method suppresses the zero-th and conjugate images completely and provides high quality of reconstructed images. In this paper basic procedure of the phase-shifting digital holography is first described. Then its applications to 3-dimensional microscopy is reported that is capable of numerical focusing and direct phase observation. Without any imaging lens we can attain resolution of a few micrometers. The second application is concerned with measurement of surface shape that takes the difference of phase distributions reconstructed from different incident angles of the object illuminating beam. This method has the same sensitivity as the conventional fringe projection but the evaluation is simpler and can also be used for deeper and smaller objects. Finally issues for practical applications are discussed." @default.
- W2059860135 created "2016-06-24" @default.
- W2059860135 creator A5016018541 @default.
- W2059860135 date "2002-02-11" @default.
- W2059860135 modified "2023-09-23" @default.
- W2059860135 title "<title>Three-dimensional microscopy and measurement by phase-shifting digital holography</title>" @default.
- W2059860135 doi "https://doi.org/10.1117/12.455184" @default.
- W2059860135 hasPublicationYear "2002" @default.
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