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Anti-Reflection Coating Thickness Calculator

Interactive calculator and graph for determining optimal AR parameters


Anti-Reflection Coating Thickness Calculator


Substrate Material:   Si
  Nitride Si3N4
  SiO2
  Amorphous Silicon
  Gallium Arsenide
  Indium Phosphide
  Aluminum
  Nickel
  Chromium
  Copper
  User Defined Substrate
Index
Extinction


AR coating material:   Optimal index and thickness
  Nitride Si3N4
  SiO2
  User Defined Film
Index


Wavelength: μm

Index Value of AR coating material n1:
Extinction Coefficient of AR coating material k1:
Index Value of substrate material n2:
Extinction Coefficient of substrate material k2:
Optimal Thickness for AR coating : μm
Percent of power reflected at this thickness: %
 

This calculator determines parameter values (coating thickness, optimal index, and reflected power percentage) for AR coatings used in a 2-film, air-ambient system with normal light incidence. First, select your desired substrate material, or provide your own material index parameters with the 'custom substrate' option. Then select the desired AR coating material, or use the 'optimal index and thickness' option to show what material parameters would give 0% reflection with your substrate.

Index values are linear interpolations on the values given in Palik's Handbook of Optical Constants. To view these values in table form, see Tabulated Optical Constants under References -> General Info