Now showing items 1-9 of 9
Applications of spatial light modulators in speckle interferometry
(SPIE-INT SOC OPTICAL ENGINEERING, 2012-01-01)
High resolution spatial light modulators (SLM) have been used in many different ways during the last years. Regarding speckle interferometry, different applications can be realized by integrating SLMs in interferometric ...
Optical vortex metrology from phase modulo 2 p maps
Conventional Optical Vortex Metrology techniques rely on the generation of pseudophase maps for image processing and measuring. In our work, as a novel alternative the application of this techniquefrom phase modulo 2p maps ...
Multi-wavelength digital in-line holographic microscopy
The use of multiple wavelength illumination in digital in-line holographic microscopy is presented. A biological sample is illuminated sequentially with three different optical sources and the separate holograms reconstructed ...
Vortex Metrology by using Fourier Analysis Techniques: Vortex Networks Correlation Fringes
(OPTICAL SOC AMER, 2012-10-01)
Vortex metrology using Fourier analysis techniques: vortex networks correlation fringes.
(OPTICAL SOC AMER, 2012-10-20)
In this work, we introduce an alternative method of analysis in vortex metrology based on the application of the Fourier optics techniques. The first part of the procedure is conducted as is usual in vortex metrology for ...
Speckle decorrelation influence on measurements quality in vortex metrology
(ELSEVIER SCIENCE BV, 2012-10-01)
We study speckle decorrelation effects in connection with conventional vortex metrology techniques. Our proposal is based on processing speckled images recorded by using two different experimental set-ups. In both schemes ...
Vortex metrology using Fourier analysis techniques: vortex networks correlation fringes
In this work, we introduce an alternativemethod of analysis in vortexmetrology based on the application of the Fourier optics techniques. The first part of the procedure is conducted as is usual in vortexmetrology for ...
Shack-Hartmann centroid detection using the spiral phase transform
(OSA - The Optical Society of America, 2012-01-01)
We present a Shack-Hartmann (SH) centroid detection algorithm capable to measure in presence of strong noise, background illumination and spot modulating signals, which are typical limiting factors of traditional centroid ...
Improvement of the signal-to-noise ratio in interferometry using multi-frame high-dynamic-range and normalization algorithms
(ELSEVIER SCIENCE BV, 2012-01-01)
Using both high dynamic range (HDR) and normalization methodologies, we show a method to improve the fringe pattern contrast in interferometric measurements normally used for phase recovering. In a simulated interferogram ...