Journal ArticleDOI
Very efficient speckle contrast reduction realized by moving diffuser device
Shigeo Kubota,Joseph W. Goodman +1 more
TLDR
Very efficient speckle contrast reduction is measured by temporal averaging using a moving diffuser on a tuning fork, which vibrates at 100 Hz over 60 microm in amplitude, a distance that is three times the surface roughness correlation length of the diffuser.Abstract:
Speckle noise reduction is best tested on a precise speckle contrast measurement bench, which should be able to measure 100% contrast in fully developed speckle as well as the smallest contrast (for example, less than 10%) after its reduction. On such a test bench, we have measured very efficient speckle contrast reduction by temporal averaging using a moving diffuser on a tuning fork, which vibrates at 100Hz over 60μm in amplitude, a distance that is three times the surface roughness correlation length of the diffuser.read more
Citations
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Proceedings ArticleDOI
Microsphere microscopic imaging with the coherent light
TL;DR: In this paper, the polystyrene (PS) microspheres with the diameter of 50μm and 90μm are applied, and their refractive index is 1.59.
Proceedings ArticleDOI
A new method for noise suppression in Digital Holography
Pasquale Memmolo,Vittorio Bianco,Melania Paturzo,Andrea Finizio,Bahram Javidi,Pietro Ferraro +5 more
TL;DR: A novel method for noise suppression in Digital Holography based on the joint action of the multiple holograms recording and the 3D Block Matching filtering (BM3D) is proposed.
Proceedings ArticleDOI
Speckle noise reduction in digital holography using random overlapping masks and 3D block matching filtering
TL;DR: The experimental results show that when the image noise is large, the proposed method can still achieve higher peak signalto-noise ratio (PSNR) and structural similarity (SSIM), especially the structural similarity, reaching 0.99.
Journal ArticleDOI
An optical-digital method of noise suppression in digital holography
Pavel A. Cheremkhin,Nikolay N. Evtikhiev,E. V. Kozlov,Vitaly V. Krasnov,Vladislav G. Rodin,Rostislav S. Starikov +5 more
TL;DR: In this article , a 3D median filter is used to suppress various types of noise in digital holography, including speckle noise, zero order and twin image, camera shot noise, and fixed pattern noise.
Journal ArticleDOI
Optimal modified lateral shearing interferometer with axial range extension by using a dual optical plate.
Kwang-Beom Seo,Seung-Ho Shin +1 more
TL;DR: The experimental result confirms the feasibility of the optimal MLSI by using a dual optical plate and the noise-reducing algorithm is used to reduce phase noise caused by the amplified noise of the synthetic wavelength.
References
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Journal ArticleDOI
Introduction to Fourier Optics
Joseph W. Goodman,Mary E. Cox +1 more
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Book
Introduction to Fourier optics
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Journal ArticleDOI
Relation between the angular dependence of scattering and the statistical properties of optical surfaces
J. M. Elson,J. M. Bennett +1 more
TL;DR: In this paper, a relation from vector scattering theory has been used to predict the angular distribution of scattered light from optical surfaces as a function of the wavelength, optical constants of the material, and spectral density function.