prysm.refractive#

Code for working with refractive index data.

prysm.refractive.cauchy(wvl, A, *args)#

Cauchy’s equation for the (real) index of refraction of transparent materials.

Parameters:

  • wvl (number) – wavelength of light, microns

  • A (number) – the first term in Cauchy’s equation

  • args (number) – B, C, … terms in Cauchy’s equation

Returns:

array of refractive indices of the same shape as wvl

Return type:

ndarray

prysm.refractive.sellmeier(wvl, A, B)#

Sellmeier glass equation.

Parameters:

  • wvl (ndarray) – wavelengths, microns

  • A (Iterable) – sequence of “A” coefficients

  • B (Iterable) – sequence of “B” coefficients

Returns:

refractive index

Return type:

ndarray

prysm.refractive.internal_transmission(t, k, wvl)#

Internal transmission of a glass slab.

Parameters:

  • t (ndarray) – thickness of the plate, millimeters

  • k (ndarray) – the complex part of the refractive index, k, in the expression n + ik

  • wvl (ndarray) – wavelength of light, microns

Return type:

complex transmission T