Dr. Ahmad Darudi Profile

Dr. Ahmad Darudi

Reaserch and Education at Univ of Zanjan

SPIE Involvement:

Author

Area of Expertise:

Interferometry , Wavefront Sensing , Optical testing , Digital holography , Optical tweezers , Hyperspectral Imaging

Websites:

Company Website

Profile Summary

Ahmad Darudi received a BS degree in physics from Ferdowsi University of Mashhad, Iran, in 1993 and master's and Ph.D. degrees in Physics from the Institute for Advanced Studies in Basic Sciences (IASBS) Zanjan, Iran, in 1996 and 2001, respectively. Following his Ph.D. work, he joined the University of Zanjan, Iran. He was a researcher between 2009-2011 at Lund Observatory, Sweden. He is currently associate professor at the physics department, the University of Zanjan.
He has experience in optical interferometry, optical testing, wavefront sensing, Hyperspectral imaging, and optical design. The most favorable projects that he has impacts are collaboration at the Site selection project of the Iranian National Observatory (INO), system manager of the Earthshine telescope at Lund University, and optical designer and system engineer of the INO340 telescope.

Publications (15)

SPIE Journal Paper | 22 December 2016 Open Access

Open Access

Digital holographic microscopy of phase separation in multicomponent lipid membranes

Vahideh Farzamrad, Ali-Reza Moradi, Ahmad Darudi, Lobat Tayebi

JBO, Vol. 21, Issue 12, 126016, (December 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.12.126016

KEYWORDS: Digital holography, Holograms, Holography, Microscopy, 3D image reconstruction, Optical signal processing, 3D image processing, Microscopes, Beam splitters, Visualization

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Proceedings Article | 22 July 2016 Paper

Paper

Polishing and testing of the 3.4 m diameter f/1.5 primary mirror of the INO telescope

Tapio Korhonen, Perttu Keinänen, Mikko Pasanen, Ahmad Darudi, Jonathan Maxwell

Proceedings Volume 9912, 99120Q (2016) https://doi.org/10.1117/12.2232691

KEYWORDS: Mirrors, Polishing, Optical testing, Polishing, Optical testing, Surface finishing, Indium oxide, Interferometry, Telescopes, Wavefronts, Monochromatic aberrations, Distance measurement

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Proceedings Article | 19 May 2016 Paper

Paper

A guide to properly select the defocusing distance for accurate solution of transport of intensity equation while testing aspheric surfaces

Peyman Soltani, Ahmad Darudi, Ali Reza Moradi, Javad Amiri, Georges Nehmetallah

Proceedings Volume 9868, 986804 (2016) https://doi.org/10.1117/12.2223208

KEYWORDS: Aspheric lenses, Inspection, Wavefront sensors, Sensors, Photovoltaics, Physics, Wavefronts, Fourier transforms, Aspheric optics, Magnesium

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Proceedings Article | 19 May 2016 Paper

Paper

SLM-based tomography of phase objects using single-shot transport of intensity technique

Georges Nehmetallah, Thanh Nguyen, Dat Tran, Ahmad Darudi, Peyman Soltani

Proceedings Volume 9868, 98680H (2016) https://doi.org/10.1117/12.2220261

KEYWORDS: Spatial light modulators, Tomography, Charge-coupled devices, Diffraction, 3D acquisition, Interferometry, 3D image processing, CCD cameras, Mirrors, Glasses

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Proceedings Article | 22 June 2015 Paper

Paper

Application of Fresnel diffraction from a 2D array of reflective disks in optical profilometry of a flat surface

Ahmad Darudi, Pegah Asgari, Yousef Pourvais

Proceedings Volume 9525, 952547 (2015) https://doi.org/10.1117/12.2184863

KEYWORDS: Visibility, Reflectivity, Near field diffraction, Environmental sensing, Diffraction, Interferometry, Mirrors, Optical testing, Fringe analysis, Turbulence

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Proceedings Article | 22 June 2015 Paper

Paper

Image restoration using aberration taken by a Hartmann wavefront sensor on extended object, towards real-time deconvolution

Ahmad Darudi, Hadi Bakhshi, Reza Asgari

Proceedings Volume 9530, 95300Q (2015) https://doi.org/10.1117/12.2184852

KEYWORDS: Point spread functions, Deconvolution, Image restoration, Sensors, Wavefront sensors, Wavefronts, Beam splitters, Image processing, Computer simulations, Image sensors

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Proceedings Article | 22 May 2015 Paper

Paper

3D high speed characterization of phase objects using the transport of intensity equation

Thanh Nguyen, Georges Nehmetallah, Ahmad Darudi, Peyman Soltani

Proceedings Volume 9495, 949512 (2015) https://doi.org/10.1117/12.2176866

KEYWORDS: Charge-coupled devices, Tomography, CCD cameras, 3D image processing, 3D modeling, Radon transform, Optical filters, Fourier transforms, Diffraction, Spherical lenses

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Proceedings Article | 14 May 2015 Paper

Paper

Experimental verification of reconstruction of two interfering wavefronts using the transport of intensity equation

Ahmad Darudi, Javad Amiri, Peyman Soltani, Georges Nehmetallah

Proceedings Volume 9489, 948904 (2015) https://doi.org/10.1117/12.2176863

KEYWORDS: Wavefronts, Phase shifts, Error analysis, Interferometry, Ferroelectric materials, Fizeau interferometers, Fringe analysis, Charge-coupled devices, Phase measurement, Phase shifting

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Proceedings Article | 18 November 2013 Paper

Paper

High resolution optical surface testing using transport of intensity equation

Peyman Soltani, Ali-Reza Moradi, Ahmad Darudi, Ramin Shomali

Proceedings Volume 8785, 87851K (2013) https://doi.org/10.1117/12.2026289

KEYWORDS: Optical testing, Wavefronts, Sensors, Wavefront sensors, Reflectivity, Microscopes, Optics manufacturing, Spatial resolution, Optical resolution, Interferometry

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Proceedings Article | 5 August 2010 Paper

Paper

The Robotic Earthshine Telescope

Ahmad Darudi, Mette Owner-Petersen, Peter Thejll, Hans Gleisner, David Taylor, Majid Ale-Ebrahem, Torben Andersen

Proceedings Volume 7733, 77332V (2010) https://doi.org/10.1117/12.857126

KEYWORDS: Telescopes, Optical filters, Resolution enhancement technologies, Cameras, Robotics, CCD cameras, Control systems, Charge-coupled devices, Stray light, Observatories

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Proceedings Article | 28 January 2006 Paper

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 | 26 February 2004 Paper

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 | 3 October 2001 Paper

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

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 | 17 August 1999 Paper

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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Showing 5 of 15 publications

Course Instructor

NON-SPIE: Advance Optics

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NON-SPIE: Optical Design

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NON-SPIE: Fourier Optics

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NON-SPIE: Optics Lab 1&2

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