Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "42.30.Ms" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Comparison of Methods for Determining the Contrast Distribution in Interference Images with Speckle Noise
Autorzy:
Pyziak, L.
Matczak, M.
Zięba, P.
Powiązania:
https://bibliotekanauki.pl/articles/1032503.pdf
Data publikacji:
2017-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.25.Hz
42.30.-d
42.30.Kq
42.30.Ms
Opis:
Information about certain physical states of an examined object is encoded in the distribution of the fringe contrast in the metrological interference images of the object. Determining the contrast is one of the steps of converting the image into the distribution of the measured quantity in holographic fringe-contrast interferometry. In this paper, three methods of determining the fringe contrast in interference images containing speckle noise are compared. As the criterion for comparing the methods, the mean absolute error has been used. It turns out, in accordance with this criterium, the most effective method is the phase-shifting one.
Źródło:
Acta Physica Polonica A; 2017, 132, 1; 173-175
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Holographic Interferometer as a Correlator of Phase Distortions with Response in the Form of Interference Pattern
Autorzy:
Derzhypolska, L. A.
Gnatovskiy, O. V.
Yezhov, P. V.
Powiązania:
https://bibliotekanauki.pl/articles/2047890.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.25.Dd
42.25.Fx
42.25.Hz
42.25.Kb
42.30.Ms
Opis:
Considered in the work are known properties of holographic interferometer as according to the correlator with output signal in the form of interference fringes. It is known that a space correlation has various ratios of intensity between central correlation peak and background part for objects with different phase microrelief of a surface. Correspondingly an interference pattern must have different space distribution of contrast. A magnitude of contrast depends on changes in distribution of microrelief of investigated object, whereas the interference pattern depends on macroscopic modification of a form of the object. Used here is a scheme of Fourier holography with a random phase modulator in signal beam, reference beam is a point source, and restoring beam is the random phase modulator with random phase shift against initial random phase modulator. Also investigated is a recording of holographic interferogram with these random phase modulators. As the results of original theoretical consideration there was obtained an expression for fringe contrast and intensity of correlation peak. This model was tested by simulating of forming of holographic interferogram and reconstruction of the cross-correlation peak with phase distortions of various statistical distributions. Compared here are theoretical results, simulation results, and results obtained in real experiment.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 1095-1100
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies