Jan Kredba
YOU?
Author Swipe
View article: Two-wavelength interferometry for measurement of transonic airflow in a compressor blade cascade
Two-wavelength interferometry for measurement of transonic airflow in a compressor blade cascade Open
This paper presents high-speed two wavelength interferometry for measuring fast phenomena, which allows to extend the dynamic range of measurement using two different wavelengths at the same time. The method was applied to measure transoni…
View article: Aspheric surface measurement by absolute wavelength scanning interferometry with model-based retrace error correction
Aspheric surface measurement by absolute wavelength scanning interferometry with model-based retrace error correction Open
This paper presents a non-nulling absolute interferometric method for fast and full-area measurement of aspheric surfaces without the necessity of any mechanical movement. Several single frequency laser diodes with some degree of laser tun…
View article: Absolute wavelength scanning interferometry for measuring the thickness of optical elements
Absolute wavelength scanning interferometry for measuring the thickness of optical elements Open
A technique for measurement of the thickness of optical elements using absolute wavelength scanning interferometry is presented in this paper. To achieve high-grade optical components and systems, the thickness of both planar and non-plana…
View article: Quantitative Schlieren imaging based on fringe projection
Quantitative Schlieren imaging based on fringe projection Open
An effective yet simple quantitative synthetic Schlieren imaging technique is presented in this paper. A multiplexed fringe pattern displayed on a common laptop screen is observed through a disturbed medium resulting in a change of the fri…
View article: Characterization of Supersonic Compressible Fluid Flow Using High-Speed Interferometry
Characterization of Supersonic Compressible Fluid Flow Using High-Speed Interferometry Open
This paper presents a very effective interference technique for the sensing and researching of compressible fluid flow in a wind tunnel facility. The developed technique is very sensitive and accurate, yet easy to use under conditions typi…
View article: Absolute interferometry for fast and precise radius measurement
Absolute interferometry for fast and precise radius measurement Open
A novel radius of the curvature measurement method for optical spherical surfaces using absolute interferometry is proposed. A measurement setup is designed and built around a common-path Fizeau interferometer. The cavity length (volume of…
View article: LA1256.ZIP
LA1256.ZIP Open
Sub-apertures measured on the LA1256 using TOPTEC AWA.
View article: Second Surface.zip
Second Surface.zip Open
Sub-apertures measured on the second experimetal surface using QED ASI.
View article: First Surface.zip
First Surface.zip Open
Sub-apertures measured on the first experimetal surface using QED ASI.
View article: Pixel-wise Amplitude Distribution Evaluation in Time Average Digital Holography
Pixel-wise Amplitude Distribution Evaluation in Time Average Digital Holography Open
This article introduces a new holographic method for harmonic vibration measurement. The method called time average sweeping digital holography (TASDH) is based on the continuous shift of fringe pattern described by Bessel function over th…
View article: Time average scanning digital holography
Time average scanning digital holography Open
Tento článek představuje novou metodu pro měření amplitud harmonických oscilací nazvanou časově středovaná skenovací digitální holografie. Rekonstruovaný intenzitní obraz z časově středovaného digitálního hologramu vytváří interferenční st…