Dr. Ahmad Darudi Profile

Dr. Ahmad Darudi

Reaserch and Education at Univ of Zanjan

SPIE Involvement:

Author

Publications (15)

SPIE Journal Paper | 22 December 2016

Digital holographic microscopy of phase separation in multicomponent lipid membranes

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

JBO Vol. 21 Issue 12

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

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 22 July 2016 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

Proc. SPIE. 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II

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

Read Abstract +

Proceedings Article | 19 May 2016 Paper

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

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

Proc. SPIE. 9868, Dimensional Optical Metrology and Inspection for Practical Applications V

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

Read Abstract +

Proceedings Article | 19 May 2016 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

Proc. SPIE. 9868, Dimensional Optical Metrology and Inspection for Practical Applications V

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

Read Abstract +

Proceedings Article | 22 June 2015 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

Proc. SPIE. 9525, Optical Measurement Systems for Industrial Inspection IX

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

Read Abstract +

Proceedings Article | 22 June 2015 Paper

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

Ahmad Darudi, Hadi Bakhshi, Reza Asgari

Proc. SPIE. 9530, Automated Visual Inspection and Machine Vision

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

Read Abstract +

Proceedings Article | 22 May 2015 Paper

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

Thanh Nguyen, Georges Nehmetallah, Ahmad Darudi, Peyman Soltani

Proc. SPIE. 9495, Three-Dimensional Imaging, Visualization, and Display 2015

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

Read Abstract +

Proceedings Article | 14 May 2015 Paper

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

Ahmad Darudi, Javad Amiri, Peyman Soltani, Georges Nehmetallah

Proc. SPIE. 9489, Dimensional Optical Metrology and Inspection for Practical Applications IV

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

Read Abstract +

Proceedings Article | 18 November 2013 Paper

High resolution optical surface testing using transport of intensity equation

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

Proc. SPIE. 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications

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

Read Abstract +

Proceedings Article | 5 August 2010 Paper

The Robotic Earthshine Telescope

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

Proc. SPIE. 7733, Ground-based and Airborne Telescopes III

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

Read Abstract +

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

Proc. SPIE. 6025, ICO20: Optical Communication

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

Read Abstract +

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

Proc. SPIE. 5252, Optical Fabrication, Testing, and Metrology

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

Read Abstract +

Proceedings Article | 3 October 2001 Paper

Applications of Fresnel diffraction from phase objects

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

Proc. SPIE. 4399, Optical Measurement Systems for Industrial Inspection II: Applications in Production Engineering

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

Read Abstract +