![]() legend ( loc = 'best', fancybox = True, handlelength = 4, fontsize = 22 ) ax. MTF circular', color = 'darkcyan', linestyle = '-.', linewidth = 3 ) ax. Full Siemens SL75 Mobile Phones Specifications Dimensions, 92 x 48 x 23 mm, 78 cc (3.62 x 1.89 x 0.91 in) Weight, 99 g (3.49 oz) Sim, Mini-SIM. High-contrast 5 MP LCD display with built-in auto-calibration and 10-bit graphics card or standard dual 5 MP LCD display with 8-bit graphics card and external sensor for calibration. ![]() axhline ( y = 0, linestyle = 'dashed', color = 'red' ) plt. plot ( xnew, ynew, 'r', label = 'Gasussian fit' ) plt. plot ( freq_all, M_all, label = 'dark subtracted star' ) plt. arccos ( freq_all / freq_c ) MTF_p = ( 2 / np. In concept, the spokes only meet at the exact center of the star. It consists of a pattern of bright 'spokes' on a dark background that radiate from a common center and become wider as they get further from it. linspace ( 0, 2, 1000 ) ynew = Gaussian ( xnew, * popt ) # perfect MTF (circular aperture, no aberrations): D = 140 lam = 617.3 * 10 ** ( - 6 ) f = 4125.3 #in pixels freq_c = D / ( lam * f * 100 ) #in arcsec #freq_c = D/(1.22*lam*206265) phi = np. A Siemens star, or spoke target, is a device used to test the resolution of optical instruments, printers, and displays. When looking at the Siemens star with slightly blurred vision, e.g. tick_params ( axis = 'both', which = 'minor', length = 3, width = 1, labelsize = 22 ) freq_all = lines M_all = lines # remove last outlier point freq_all = freq_all #/ 0.5 M_all = M_all #M_all =M_all/M_all.max() # fit MTF with a gaussian p0_g = popt, pcov = curve_fit ( Gaussian, freq_all, M_all, p0_g, maxfev = 8000 ) xnew = np. tick_params ( axis = 'both', which = 'major', length = 6, width = 1, labelsize = 22 ) ax. set_yticks ( minor_ticks_y, minor = True ) ax. ![]() ![]() Part 4 : Field strength measurements in blown SF6 - arcs ( BMT - FB - T. arange ( 0, 2, 0.1 ) major_ticks_y = np. set_ylabel ( 'MTF', fontsize = 24 ) major_ticks = np. set_xlabel ( 'Cycle/pixel', fontsize = 24 ) ax. figure ( figsize = ( 20, 14 ), dpi = 300 ) ax = figure.
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