Prof. Mohammad T. Tavassoly Profile

Prof. Mohammad T. Tavassoly

at University of Tehran

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 17 December 2013 Paper

Investigation of correlation properties of light fields by Fresnel diffraction from a step

S. Hosseini, M. Tavassoly

Proceedings Volume 9066, 906607 (2013) https://doi.org/10.1117/12.2050867

KEYWORDS: Diffraction, Visibility, Spatial coherence, Near field diffraction, Light emitting diodes, Temporal coherence, Light, Coherence (optics), Mirrors, Mercury

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SPIE Journal Paper | 1 December 2011

Roughness measurement using threshold angle of image formation

Masoomeh Dashtdar, Mohammad Tavassoly

OE, Vol. 50, Issue 12, 123601, (December 2011) https://doi.org/10.1117/12.10.1117/1.3660297

KEYWORDS: Interfaces, Light scattering, Image acquisition, Reflection, Refractive index, Surface roughness, Fourier transforms, Optical engineering, Charge-coupled devices, Solids

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Proceedings Article | 25 October 2011 Paper

Mirage is the image of an object in the flat ground surface

M. Tavassoly, M. Dashtdar

Proceedings Volume 8011, 80112K (2011) https://doi.org/10.1117/12.901529

KEYWORDS: Temperature metrology, Reflection, Image acquisition, Surface roughness, Photography, Light scattering, Mirrors, Glasses, Refractive index, Physics

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Proceedings Article | 27 May 2011 Paper

Submicron displacements measurement by measuring autocorrelation of the transmission function of a grating

K. Madanipour, M. Tavassoly

Proceedings Volume 8082, 80823O (2011) https://doi.org/10.1117/12.889556

KEYWORDS: Sensors, Environmental sensing, Modulation transfer functions, Optical testing, Ronchi rulings, Error analysis, Transmittance, Amplifiers, Scanning electron microscopy, Microscopes

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SPIE Journal Paper | 1 May 2008

Determination of vibration parameters of a large-scale structure by measuring the visibility changes on the time-averaged images of a sinusoidal pattern fixed on it

Saifollah Rasouli, Mohammad Tavassoly

OE, Vol. 47, Issue 05, 053603, (May 2008) https://doi.org/10.1117/12.10.1117/1.2927460

KEYWORDS: Visibility, Video, Optical engineering, Holographic interferometry, Bessel functions, Iron, Holography, Modal analysis, Digital holography, Imaging systems

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SPIE Journal Paper | 1 December 2007

Application of Fresnel diffraction to nondestructive measurement of the refractive index of optical fibers

Arash Sabatyan, Mohammad Tavassoly

OE, Vol. 46, Issue 12, 128001, (December 2007) https://doi.org/10.1117/12.10.1117/1.2819745

KEYWORDS: Near field diffraction, Refractive index, Chlorine, Optical fibers, Step index fibers, Charge-coupled devices, Diffraction, Nondestructive evaluation, Optical engineering, Liquids

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Proceedings Article | 28 September 2006 Paper

Measurement of the refractive-index structure constant,C2n, and its profile in the ground level atmosphere by moiré technique

Saifollah Rasouli, Mohammad Tavassoly

Proceedings Volume 6364, 63640G (2006) https://doi.org/10.1117/12.683873

KEYWORDS: Atmospheric propagation, Turbulence, Refractive index, Atmospheric turbulence, Atmospheric optics, Telescopes, Wavefronts, Wave propagation, Radio propagation, Astronomical imaging

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Proceedings Article | 28 September 2006 Paper

Measurement of modulation transfer function of the atmosphere in the surface layer by moiré technique

Saifollah Rasouli, Khosro Madanipour, Mohammad Tavassoly

Proceedings Volume 6364, 63640K (2006) https://doi.org/10.1117/12.687614

KEYWORDS: Modulation transfer functions, Transmittance, Imaging systems, Atmospheric optics, Ronchi rulings, Turbulence, Atmospheric propagation, Image quality, Image transmission, Atmospheric physics

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Proceedings Article | 28 January 2006 Paper

Determination of the refractive index profile of fiber preform by lateral shearing interferometry

Ahmad Darudi, M. Tavassoly, H. Salvdari

Proceedings Volume 6025, 60251Y (2006) https://doi.org/10.1117/12.667091

KEYWORDS: Fringe analysis, Refractive index, Interferometry, Wavefronts, Interferometers, Direct methods, Charge-coupled devices, Mirrors, Optical aberrations, Physics

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Proceedings Article | 28 January 2006 Paper

Nondestructive determination of the refractive indices of step index optical fibers by Fresnel diffraction

A. Sabatyan, M. Tavassoli

Proceedings Volume 6025, 60251Z (2006) https://doi.org/10.1117/12.667092

KEYWORDS: Refractive index, Chlorine, Optical fibers, Diffraction, Nondestructive evaluation, Charge-coupled devices, Near field diffraction, Cladding, Microscopes, Multimode fibers

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Proceedings Article | 9 December 2005 Paper

Moiré deflectometer for measuring distortion in sheet glasses

Saifollah Rasouli, Mohammad Tavassoly

Proceedings Volume 6024, 60240E (2005) https://doi.org/10.1117/12.666818

KEYWORDS: Glasses, Distortion, Imaging systems, Fringe analysis, Phase shifting, Phase shifts, Signal processing, Moire patterns, Glass casting, Image transmission

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Proceedings Article | 13 June 2005 Paper

Specification of vibrational modes and amplitudes in large-scale structure by time averaging moiré technique

Saifollah Rasouli, Mohammad Tavassoly

Proceedings Volume 5856, (2005) https://doi.org/10.1117/12.612414

KEYWORDS: Visibility, Holographic interferometry, Reflectivity, Imaging systems, Bessel functions, Speckle interferometry, Modal analysis, Image processing, Mechanical engineering, Digital cameras

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Proceedings Article | 26 February 2004 Paper

Fabrication and determination of refractive index profile of the planar waveguides by wedge technique

Seyed Sadat Hosseini, Ahmad Darudi, Mohammad Tavassoly

Proceedings Volume 5252, (2004) https://doi.org/10.1117/12.503918

KEYWORDS: Refractive index, Waveguides, Fringe analysis, Planar waveguides, Ion exchange, Mach-Zehnder interferometers, Diffusion, Fabrication, Ions, Interferometry

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Proceedings Article | 23 October 2001 Paper

Specification of spectral line shape and dispersion of a medium by self-imaging and moire techniques

Mohammad Tavassoly, Mohammad Abolhassani

Proceedings Volume 4398, (2001) https://doi.org/10.1117/12.445570

KEYWORDS: Moire patterns, Visibility, Fourier transforms, Refractive index, Interferometry, Solids, Sensors, Water, Liquids, Charge-coupled devices

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Proceedings Article | 3 October 2001 Paper

Applications of Fresnel diffraction from phase objects

Mohammad Tavassoly, Ahmad Darudi, Hamid Khalesifard, Seyed Sadat Hosseini

Proceedings Volume 4399, (2001) https://doi.org/10.1117/12.445579

KEYWORDS: Visibility, Diffraction, Refractive index, Near field diffraction, Reflection, Mirrors, Phase measurement, Polonium, Beam splitters, Fourier transforms

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Proceedings Article | 17 August 1999 Paper

Interferometric specification of lens parameters

Ahmad Darudi, Mohammad Tavassoly

Proceedings Volume 3745, (1999) https://doi.org/10.1117/12.357768

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Proceedings Article | 17 August 1999 Paper

Application of two-wave mixing for interferometric nonlinear refractive index measurement

Hamid Khalesifard, Ahmad Darudi, Mohammad Tavassoly

Proceedings Volume 3745, (1999) https://doi.org/10.1117/12.357767

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Proceedings Article | 19 July 1999 Paper

Fresnel diffraction from a step in reflection and transmission modes

Mohammad Tavassoly, M. Sahlol-Bai, M. Salehi, Hamid Khalesifard

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354885

KEYWORDS: Near field diffraction, Diffraction, Reflection, Reflectivity, Wavefronts, Photography, Metals, Dielectrics, Interferometry, Coherence (optics)

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