An optical wavefront propagation utility
Project description
Python PROPER
Implementation of John Krist's PROPER optical propagation library for Python version 3.x. PROPER is a library of optical propagation procedures and functions for the IDL (Interactive Data Language) environment. PROPER is intended for exploring diffraction effects in optical systems. It is a set of wavefront propagation tools – it is not a ray tracing system and thus is not suitable for detailed design work.
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Authors: Navtej Singh, Nikta Amiri, Luis Marchen, A J Eldorado Riggs
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Contact: nsaini@jpl.nasa.gov
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Organization: NASA Jet Propulsion Laboratory California Institute of Technology
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Following requirements should be met to run pyPROPER3 -
- Numpy >= 1.8
- Scipy >= 0.14
- astropy >= 1.3
To use FFTW, you will also need pyfftw >= 0.1
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To install PROPER, execute the following command in downloaded PyPROPER directory -
python setup.py install
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To use PROPER without installing, issue following commands in python/ipython shell
import sys.path.insert(0, /path/to/PROPER)
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To run a prescription in interactive mode -
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Open python or ipython shell and change directory to where the prescription is lying.
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Import proper package -
import proper -
Execute the prescription -
(psf, sampling) = proper.prop_run('prescription_name', wavelength, grid_size)where the first parameter is name of prescription (without file extension), second parameter is wavelength in micrometer and third argument is grid dimension. You can also pass key-value pairs as optional parameters. To run multiple cases at once in parallel, use prop_run_multi instead.
Please refer to PROPER user manual for more details.
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One can display the generated point spread function (psf) using matplotlib package -
import numpy as np
import matplotlib.pylab as pltplt.imshow(np.log10(psf), origin = 'lower')
plt.show() -
The PSF can be saved as FITS image -
proper.prop_fits_write("example.fits", psf)where the first parameter is FITS image file name and second parameter is 2D numpy array. prop_fits_write also accepts optional key-value parameters (check doc-string in prop_fits_write for more details). This function will overwrite an existing FITS image with the same name.
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