AR Coating Quarter-Wave calculator
Single-layer AR ideal physical thickness and ideal index.
Category: Thin Films
Formula: d = λ/(4n) · n_ideal = √(n0·ns)
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| Wavelength | lam | nm | 550 |
| Coating n | n | 1.38 | |
| Substrate n | ns | 1.52 |
Result with the default inputs
- QW thickness: 99.6377 nm
- Ideal n: 1.2329
- Ideal n (n0=1): 1.2329
Open it with your own values: put each input in the address as a parameter, for example /calculators/ar-coating-quarter-wave?lam=550. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Anti-reflective coating