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Monopulse location sounding method for natural fossils
Engineering Education # 12, December 2012
DOI: 10.7463/1212.0482683
In this paper the authors study capabilities of the monopulse optical location method of measuring reflection coefficient of natural fossils. It was shown that use of quadrature formulae and a regularization method allows to reconstruct spatial distribution of smooth varying reflectivity under the conditions of measurement noise in a wide coverage area of the optical locator
77-30569/326698 Laser reflectometry method of measurement of thickness of gold nanofilms on quartz substrate
Engineering Education # 03, March 2012
 In this paper the authors consider a laser reflectometric method of measurement of thickness of metallic films on dielectric substratewas. Optimal wavelengths for measuring thickness of gold nanofilms on quartz substrate were determined; error estimation for determining film thickness from laser reflectometry measurements was obtained. Mathematical simulation shows that the method allows to measure a gold nanofilm with thickness from 1 nm to 5 nm using wavelength 1310 or 1550 nm with mean error ~ 0,15 % and with thickness from 5 nm to 50 nm using wavelength 515 nm with mean error ~ 0,25 % and the relative root-mean-square value of measurement noise 1 %.
 
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