PyOptik documentation

PyOptik is a unit-aware Python toolkit for optical material data, dispersion, Fresnel interfaces, and coherent thin-film stacks. It combines a searchable RefractiveIndex.INFO catalog with APIs for measured and fitted materials.

Start with a plot

• Calculate silica group index and dispersion.

• Plot gold’s refractive index and extinction coefficient.

• Design an antireflection coating.

Each tutorial includes a complete script and an Open in Colab notebook.

Getting started	Install the package, download the catalog, and calculate refractive index with explicit wavelength units.
Example gallery	Follow executable examples for dispersion, custom data, interfaces, coatings, pulse properties, and catalog search.
Interfaces and thin films	Calculate Fresnel coefficients and coherent multilayer spectra for s and p polarization.
Custom materials	Construct materials from arrays, CSV files, or formula coefficients and export validated YAML.

Quick example

from TypedUnit import ureg
from PyOptik import material, fresnel_coefficients

glass = material("N-BK7")

wavelength = 550 * ureg.nanometer
index = glass.compute_refractive_index(wavelength)
interface = fresnel_coefficients(1.0, glass, wavelength=wavelength)

print(index)
print(interface.reflectance)

• Getting started
  • Installation
  • Your first calculation
  • Common properties
  • Next steps
• Optics tutorials in Python
  • Calculate silica group index and dispersion in Python
  • Plot gold’s refractive index and extinction coefficient in Python
  • Design an antireflection coating in Python
• User guide
• Example gallery
• API reference
  • Public API
• References
  • Upstream database
  • PyOptik