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dbmaterial.py
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dbmaterial.py
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# from: https://github.com/HugoGuillen/refractiveindex.info-sqlite
import os
import yaml
import sys
import argparse
import numpy
import scipy.interpolate
class DBMaterial:
""" Material class"""
def __init__(self, filename,interpolation_points=100,empty=False):
"""
:param filename:
"""
self.refractiveIndex = None
self.extinctionCoefficient = None
self.points = interpolation_points
if empty:
return
f = open(filename)
try:
material = yaml.safe_load(f)
except:
raise Exception('Bad Material YAML File.')
finally:
f.close()
previous_formula = False
for data in material['DATA']:
if (data['type'].split())[0] == 'tabulated':
rows = data['data'].split('\n')
splitrows = [c.split() for c in rows]
wavelengths = []
n = []
k = []
for s in splitrows:
if len(s) > 0:
wavelengths.append(float(s[0]))
n.append(float(s[1]))
if len(s) > 2:
k.append(float(s[2]))
self.points = len(wavelengths)
if (data['type'].split())[1] == 'n':
if self.refractiveIndex is not None:
Exception('Bad Material YAML File')
self.refractiveIndex = RefractiveIndexData.SetupRefractiveIndex(formula=-1,
wavelengths=wavelengths,
values=n)
elif (data['type'].split())[1] == 'k':
self.extinctionCoefficient = ExtinctionCoefficientData.SetupExtinctionCoefficient(wavelengths, n)
if previous_formula:
self.refractiveIndex = RefractiveIndexData.SetupRefractiveIndex(formula=formula,
rangeMin=rangeMin,
rangeMax=rangeMax,
coefficients=coefficients,
interpolation_points=self.points)
elif (data['type'].split())[1] == 'nk':
if self.refractiveIndex is not None:
Exception('Bad Material YAML File')
self.refractiveIndex = RefractiveIndexData.SetupRefractiveIndex(formula=-1,
wavelengths=wavelengths,
values=n)
self.extinctionCoefficient = ExtinctionCoefficientData.SetupExtinctionCoefficient(wavelengths, k)
elif (data['type'].split())[0] == 'formula':
if self.refractiveIndex is not None:
Exception('Bad Material YAML File')
formula = int((data['type'].split())[1])
coefficients = [float(s) for s in data['coefficients'].split()]
rangeMin = float(data['wavelength_range'].split()[0])
rangeMax = float(data['wavelength_range'].split()[1])
previous_formula = True
self.refractiveIndex = RefractiveIndexData.SetupRefractiveIndex(formula=formula,
rangeMin=rangeMin,
rangeMax=rangeMax,
coefficients=coefficients,
interpolation_points=self.points)
if self.refractiveIndex is not None:
self.rangeMin = self.refractiveIndex.rangeMin
self.rangeMax = self.refractiveIndex.rangeMax
else:
self.rangeMin = self.extinctionCoefficient.rangeMin
self.rangeMax = self.extinctionCoefficient.rangeMax
def get_refractiveindex(self, wavelength):
"""
:param wavelength:
:return: :raise Exception:
"""
if self.refractiveIndex is None:
raise Exception('No refractive index specified for this material')
else:
return self.refractiveIndex.get_refractiveindex(wavelength)
def get_extinctioncoefficient(self, wavelength):
"""
:param wavelength:
:return: :raise NoExtinctionCoefficient:
"""
if self.extinctionCoefficient is None:
raise NoExtinctionCoefficient('No extinction coefficient specified for this material')
else:
return self.extinctionCoefficient.get_extinction_coefficient(wavelength)
def get_complete_extinction(self):
if self.has_extinction():
return self.extinctionCoefficient.get_complete_extinction()
else:
return None
def get_complete_refractive(self):
if self.has_refractive():
return self.refractiveIndex.get_complete_refractive()
else:
return None
def has_refractive(self):
return self.refractiveIndex is not None
def has_extinction(self):
return self.extinctionCoefficient is not None
def get_page_info(self):
return self.pageinfo
def to_csv(self, output):
refr = self.get_complete_refractive()
ext = self.get_complete_extinction()
#FizzFuzz
if self.has_refractive() and self.has_extinction() and len(refr) == len(ext):
header = "wl,n,k\n"
output_f = open(output.replace(".csv","(nk).csv"),'w')
output_f.write(header)
for i in range(len(refr)):
output_f.write(",".join(list(map(str,[refr[i][0],refr[i][1],ext[i][1]])))+"\n")
output_f.close()
print("Wrote",output.replace(".csv","(nk).csv"))
else:
if self.has_refractive():
output_f = open(output.replace(".csv","(n).csv"),'w')
header = "wl,n\n"
output_f.write(header)
for i in range(len(refr)):
output_f.write(",".join(list(map(str,[refr[i][0],refr[i][1]])))+"\n")
output_f.close()
print("Wrote",output.replace(".csv","(n).csv"))
if self.has_extinction():
output_f = open(output.replace(".csv","(k).csv"),'w')
header = "wl,k\n"
output_f.write(header)
for i in range(len(ext)):
output_f.write(",".join(list(map(str,[ext[i][0],ext[i][1]])))+"\n")
output_f.close()
print("Wrote",output.replace(".csv","(k).csv"))
def to_txt(self, output):
refr = self.get_complete_refractive()
ext = self.get_complete_extinction()
#FizzFuzz
if self.has_refractive():
output_f = open(output.replace(".txt","_n.txt"),'w')
for i in range(len(refr)):
output_f.write(" ".join(list(map(str,[refr[i][0]*1e-6,refr[i][1]])))+"\n")
output_f.close()
print("Wrote",output.replace(".txt","_n.txt"))
else:
print("No n data available, file not written")
if self.has_extinction():
output_f = open(output.replace(".txt","_k.txt"),'w')
for i in range(len(ext)):
output_f.write(" ".join(list(map(str,[ext[i][0]*1e-6,ext[i][1]])))+"\n")
output_f.close()
print("Wrote",output.replace(".txt","_k.txt"))
else:
print("No k data available, file not written")
@staticmethod
def FromLists(pageinfo,wavelengths_r=None,refractive=None,wavelengths_e=None,extinction=None):
mat = DBMaterial("",empty=True)
mat.pageinfo = pageinfo
if refractive is not None:
mat.refractiveIndex = TabulatedRefractiveIndexData.FromLists(wavelengths_r,refractive)
mat.rangeMin = mat.refractiveIndex.rangeMin
mat.rangeMax = mat.refractiveIndex.rangeMax
if extinction is not None:
mat.extinctionCoefficient = ExtinctionCoefficientData.FromLists(wavelengths_e,extinction)
mat.rangeMin = mat.extinctionCoefficient.rangeMin
mat.rangeMax = mat.extinctionCoefficient.rangeMax
return mat
#
# Refractive Index
#
class RefractiveIndexData:
"""Abstract RefractiveIndex class"""
@staticmethod
def SetupRefractiveIndex(formula, **kwargs):
"""
:param formula:
:param kwargs:
:return: :raise Exception:
"""
if formula >= 0:
return FormulaRefractiveIndexData(formula, **kwargs)
elif formula == -1:
return TabulatedRefractiveIndexData(**kwargs)
else:
raise Exception('Bad RefractiveIndex data type')
def get_refractiveindex(self, wavelength):
"""
:param wavelength:
:raise NotImplementedError:
"""
raise NotImplementedError('Different for functionally and experimentally defined materials')
class FormulaRefractiveIndexData:
"""Formula RefractiveIndex class"""
def __init__(self, formula, rangeMin, rangeMax, coefficients,interpolation_points):
"""
:param formula:
:param rangeMin:
:param rangeMax:
:param coefficients:
"""
self.formula = formula
self.rangeMin = rangeMin
self.rangeMax = rangeMax
self.coefficients = coefficients
self.interpolation_points = interpolation_points
def get_complete_refractive(self):
#print(self.rangeMin, self.rangeMax)
wavelength = numpy.linspace(self.rangeMin, self.rangeMax,num=self.interpolation_points)
extlist = [[wavelength[i], self.get_refractiveindex(wavelength[i] * 1000)] for i in range(len(wavelength))]
#return numpy.array(extlist)
return extlist
def get_refractiveindex(self, wavelength):
"""
:param wavelength:
:return: :raise Exception:
"""
wavelength /= 1000.0
if self.rangeMin <= wavelength <= self.rangeMax:
formula_type = self.formula
coefficients = self.coefficients
n = 0
if formula_type == 1: # Sellmeier
nsq = 1 + coefficients[0]
g = lambda c1, c2, w: c1 * (w ** 2) / (w ** 2 - c2 ** 2)
for i in range(1, len(coefficients), 2):
nsq += g(coefficients[i], coefficients[i + 1], wavelength)
n = numpy.sqrt(nsq)
elif formula_type == 2: # Sellmeier-2
nsq = 1 + coefficients[0]
g = lambda c1, c2, w: c1 * (w ** 2) / (w ** 2 - c2)
for i in range(1, len(coefficients), 2):
nsq += g(coefficients[i], coefficients[i + 1], wavelength)
n = numpy.sqrt(nsq)
elif formula_type == 3: # Polynomal
g = lambda c1, c2, w: c1 * w ** c2
nsq = coefficients[0]
for i in range(1, len(coefficients), 2):
nsq += g(coefficients[i], coefficients[i + 1], wavelength)
n = numpy.sqrt(nsq)
elif formula_type == 4: # RefractiveIndex.INFO
g = lambda wl, ci, cj, ck, cl: ci * wl**cj / (wl**2 - ck**cl)
n = coefficients[0]
n += g(wavelength, *coefficients[1:5])
n += g(wavelength, *coefficients[5:9])
for kk in range(len(coefficients[9:]) // 2):
n += coefficients[9+kk] * wavelength**coefficients[9+kk+1]
n = numpy.sqrt(n)
elif formula_type == 5: # Cauchy
g = lambda c1, c2, w: c1 * w ** c2
n = coefficients[0]
for i in range(1, len(coefficients), 2):
n += g(coefficients[i], coefficients[i + 1], wavelength)
elif formula_type == 6: # Gasses
n = 1 + coefficients[0]
g = lambda c1, c2, w: c1 / (c2 - w ** (-2))
for i in range(1, len(coefficients), 2):
n += g(coefficients[i], coefficients[i + 1], wavelength)
elif formula_type == 7: # Herzberger
n = coefficients[0]
n += coefficients[1] / (wavelength**2 - 0.028)
n += coefficients[2] * (1 / (wavelength**2 - 0.028))**2
for i, cc in enumerate(coefficients[3:]):
n += cc * wavelength**(2*(i+1))
elif formula_type == 8: # Retro
n = coefficients[0]
n += coefficients[1] * wavelength**2 / (wavelength**2 - coefficients[2])
n += coefficients[3] * wavelength**2
n = numpy.sqrt(-(2 * n + 1) / (n - 1))
elif formula_type == 9: # Exotic
n = coefficients[0]
n += coefficients[1] / (wavelength**2 - coefficients[2])
n += coefficients[3] * (wavelength - coefficients[4]) / \
((wavelength - coefficients[4])**2 + coefficients[5])
n = numpy.sqrt(n)
else:
raise Exception('Bad formula type')
return n
else:
raise Exception(
'Wavelength {} is out of bounds. Correct range(um): ({}, {})'.format(wavelength, self.rangeMin,
self.rangeMax))
class TabulatedRefractiveIndexData:
"""Tabulated RefractiveIndex class"""
def __init__(self, wavelengths, values):
"""
:param wavelengths:
:param values:
"""
self.rangeMin = numpy.min(wavelengths)
self.rangeMax = numpy.max(wavelengths)
if self.rangeMin == self.rangeMax:
self.refractiveFunction = values[0]
else:
self.refractiveFunction = scipy.interpolate.interp1d(wavelengths, values)
self.wavelengths = wavelengths
self.coefficients = values
@staticmethod
def FromLists(wavelengths,values):
return TabulatedRefractiveIndexData(wavelengths,values)
def get_refractiveindex(self, wavelength):
"""
:param wavelength:
:return: :raise Exception:
"""
wavelength /= 1000.0
if self.rangeMin == self.rangeMax and self.rangeMin == wavelength:
return self.refractiveFunction
elif self.rangeMin <= wavelength <= self.rangeMax and self.rangeMin != self.rangeMax:
return self.refractiveFunction(wavelength)
else:
raise Exception(
'Wavelength {} is out of bounds. Correct range(um): ({}, {})'.format(wavelength, self.rangeMin,
self.rangeMax))
def get_complete_refractive(self):
extlist = [[self.wavelengths[i],self.coefficients[i]] for i in range(len(self.wavelengths))]
#return numpy.array(extlist)
return extlist
#
# Extinction Coefficient
#
class ExtinctionCoefficientData:
"""ExtinctionCofficient class"""
@staticmethod
def SetupExtinctionCoefficient(wavelengths, values):
"""
:param wavelengths:
:param values:
:return:
"""
return ExtinctionCoefficientData(wavelengths, values)
@staticmethod
def FromLists(wavelengths,values):
return ExtinctionCoefficientData(wavelengths, values)
def __init__(self, wavelengths, coefficients):
"""
:param wavelengths:
:param coefficients:
"""
self.extCoeffFunction = scipy.interpolate.interp1d(wavelengths, coefficients)
self.rangeMin = numpy.min(wavelengths)
self.rangeMax = numpy.max(wavelengths)
self.wavelengths = wavelengths
self.coefficients = coefficients
def get_extinction_coefficient(self, wavelength):
"""
:param wavelength:
:return: :raise Exception:
"""
wavelength /= 1000.0
if self.rangeMin <= wavelength <= self.rangeMax:
return self.extCoeffFunction(wavelength)
else:
raise Exception(
'Wavelength {} is out of bounds. Correct range(um): ({}, {})'.format(wavelength, self.rangeMin,
self.rangeMax))
def get_complete_extinction(self):
extlist = [[self.wavelengths[i],self.coefficients[i]] for i in range(len(self.wavelengths))]
#return numpy.array(extlist)
return extlist
#
# Custom Exceptions
#
class FormulaNotImplemented(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
class NoExtinctionCoefficient(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)