Fast and robust automatic calibration for single-shot dual-wavelength digital holography based on speckle displacements

D Khodadad, P Bergström, E Hällstig, M Sjödahl - Applied optics, 2015 - opg.optica.org
The objective of this paper is to describe a fast and robust automatic single-shot dual-
wavelength holographic calibration method that can be used for online shape measurement …

Double-field-of-view, quasi-common-path interferometer using Fourier domain multiplexing

B Tayebi, F Sharif, MR Jafarfard, DY Kim - Optics express, 2015 - opg.optica.org
We present a quasi-common-path interferometer with a double field of view (FOV). The laser
beam of an imaging system is separated into three parts using three mirrors; the first and …

Large step-phase measurement by a reduced-phase triple-illumination interferometer

B Tayebi, MR Jafarfard, F Sharif, YS Song, D Har… - Optics …, 2015 - opg.optica.org
We present a reduced-phase triple-illumination interferometer (RPTII) as a novel single-shot
technique to increase the precision of dual-illumination optical phase unwrapping …

Full-field 3D deformation measurement: comparison between speckle phase and displacement evaluation

D Khodadad, AK Singh, G Pedrini, M Sjödahl - Applied Optics, 2016 - opg.optica.org
The objective of this paper is to describe a full-field deformation measurement method
based on 3D speckle displacements. The deformation is evaluated from the slope of the …

Single shot dual-wavelength digital holography: calibration based on speckle displacements

D Khodadad, P Bergström, E Hällstig… - International Journal of …, 2014 - Taylor & Francis
We present a calibration method which allows single shot dual wavelength online shape
measurement in a disturbed environment. Effects of uncontrolled carrier frequency filtering …

Dual-wavelength digital holography: single-shot shape evaluation using speckle displacements and regularization

P Bergström, D Khodadad, E Hällstig, M Sjödahl - Applied Optics, 2013 - opg.optica.org
This paper discusses the possibility of evaluating the shape of a free-form object in
comparison with its shape prescribed by a CAD model. Measurements are made based on a …

Compact single-shot four-wavelength quantitative phase microscopy with polarization-and frequency-division demultiplexing

B Tayebi, JH Han, F Sharif, MR Jafarfard, DY Kim - Optics Express, 2017 - opg.optica.org
We present a novel single-shot four-wavelength quantitative phase microscopy (FW-QPM).
Four lasers operating at different wavelengths are multiplexed with a pair of dichroic mirrors …

Phase-derivative-based estimation of a digital reference wave from a single off-axis digital hologram

D Khodadad - Applied optics, 2016 - opg.optica.org
This paper describes a method to obtain an estimated digital reference wave from a single
off-axis digital hologram that matches the actual experimental reference wave as closely as …

Speckle characteristic based auto-focusing approach for diffuse object in digital holography

K Li, J Long, P Cai - Optics Communications, 2025 - Elsevier
Multi-wavelength digital holography extends the axial measurement range to the order of
several tens of microns or more and makes the inspection of optical-rough objects and …

Multiplexed digital holography incorporating speckle correlation

D Khodadad - 2016 - diva-portal.org
This work has been carried out at the Division of Fluid and Experimental Mechanics,
Department of Engineering Sciences and Mathematics at Luleå University of Technology …