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Digital diffusers for optical holography
Optics Letters, 1991In optical Fourier holography, diffuse illumination is used to achieve an almost linear recording of the spatial frequencies of the object on film. To this end, usually a ground glass is placed next to the object. However, then a speckle pattern occurs in the reconstruction. In digital holography, diffusers can be designed that do not introduce speckle.
R, Bräuer +3 more
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Surface profilometry by digital holography
2017 22nd IEEE International Conference on Emerging Technologies and Factory Automation (ETFA), 2017This paper presents newly developed method for measurement of surface topography based on frequency scanning digital holography. Digital holography allows for direct computation of the phase field of the wavefront scattered by an object. A tuning of the light source optical frequency results in linear phase variation with respect to the optical ...
Pavel Psota +4 more
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Digital holography-based steganography
Optics Letters, 2010A steganographic method offering a high hiding capacity is presented in which the techniques of digital holography are used to distribute information from a small secret image across the larger pixel field of a cover image. An iterative algorithm is used to design a phase-only or complex hologram from a padded version of the secret image, quantizing ...
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Digital Holography Applied to Microscopy
2006Keywords: [MVD] Reference LOA-CHAPTER-2006-001 Record created on 2009-07-20, modified on 2017-05 ...
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Applications of digital and analog holography in three-dimensional imaging
Advances in Optics and Photonics, 2012Partha Banerjee
exaly