mirror of
https://github.com/yosata/fourierOptics.git
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76 lines
2.3 KiB
Python
76 lines
2.3 KiB
Python
#!/usr/bin/env Python3
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import numpy as np
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from pdb import set_trace
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import matplotlib.pyplot as plt
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from matplotlib.ticker import FormatStrFormatter
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from matplotlib.colors import LogNorm
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import time
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import sys
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sys.path.insert(0, '/Users/joost/Dropbox/Werk/PhD/Documents/Published/FourierOptics GitHub release/')
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from fourierOptics import *
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'''
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2022-08-02: I don't understand the relation between the name of this script
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and what happens within. It does seem to simulate a broadband PSF. And there's
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also a phaseTilt function defined. Probably, I was testing out small phase tilts
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to shift the PSF off-axis.
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'''
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def phaseTilt(x,y,tx,ty):
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phaseTilt = x * np.tan(np.deg2rad(tx)) + y * np.tan(np.deg2rad(ty))
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return phaseTilt
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if __name__ == '__main__':
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plt.rc('font', family='serif')
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plt.rc('axes', labelsize='large')
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# Start time counter
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start = time.time()
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lList = [30e-3, 32.5e-3, 35e-3, 37.5e-3, 40e-3]
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Exyz_list = []
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# Pick a wavelength
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l = 30e-3
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for l in lList:
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# Initiate Fourier Optics
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fou = FourierOptics(l=l)
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# Pick sampling parameters
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dpix = 1/20
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n, m = 2001, 2001
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print ('Your resolution is {}x{} with a pixel size of {}'.format(n,m,dpix))
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# Initiate the profiles class and pick a profile (tophat, obscured tophat or spider)
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prof = Profiles()
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A = prof.top_hat(2.5, n, m, dpix=dpix, oversample=1)
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# A = prof.ELT_pupil(n,m,dpix)
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plt.imshow(np.abs(A))
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# Create an input grid
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x, y = np.meshgrid(np.linspace(-n/2*dpix, n/2*dpix, n), np.linspace(-m/2*dpix, m/2*dpix, m))
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# Create a lens with a focal length ~100 mm, with a clear aperture radius of 4 mm and thickness of 1 mm.
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L1 = SphericalLens('N-BK7', thickness=5, R1=100, R2=300, CA=5, name='L1')
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print('Focal length of lens {} is {:.1f} mm.'.format(L1.name, L1.f))
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# L1.add_wavefront_error(phaseTilt(x,y,tx=0,ty=2.5))
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# Calculate the phase delay introduced by the lens
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t_l = L1.phase_delay(x,y,l, paraxial=False)
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U_in = A * t_l
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# Performing the propagation using Fresnel approximation to the focal plane.
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oC = [x.min(), x.max(), y.min(), y.max()]
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# oC = [0,x.max(),0,y.max()]
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savename = False
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Exyz_og,_,_ = fou.fresnel_propagation(U_in, x, y, dz=L1.f, show=True, save=savename, outputCoordinates=oC)
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Exyz_list.append(Exyz_og)
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Exyz = np.asarray(Exyz_list).sum(axis=0)
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plt.imshow(np.abs(Exyz), cmap='hot');plt.colorbar();plt.show()
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