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Spectral Reflectance Calculator

Calculate reflectance due to thin-film interference by entering your films below. Reflectance at wavelengths from 200 nm to 2000 nm may be calculated. Up to 20 films may be entered. Our Reflectance Calculator uses the same calculation engine that our thin-film measurement systems do, which is based on the complex-matrix form of the Fresnel equations.

Plot the Following:

Polarization:
Layer Number Material Type Thickness
Medium
1
Substrate

Enter the refractive index of your material at 632.8nm. The Calculator will add dispersion that approximates the average dispersion of materials with that refractive index.