Thin Film Optics Calculator
Free calculate interference, reflectance, transmittance, and optical path difference for thin films. determine film thickness for anti-reflection coatings, mirrors, and optical filters.
Input Parameters
Glass: 1.5, MgF₂: 1.38, TiO₂: 2.4
Air: 1.0, Water: 1.33
Visible light: 400-700 nm
degrees
0° = normal incidence
Results
Enter parameters to calculate thin film properties
Thin Film Optics Formulas
Optical Path Difference
OPD = 2n₁d cos(θ₁)
Where:
- • n₁ = film refractive index
- • d = film thickness
- • θ₁ = angle in film
Interference Condition
Constructive: OPD = mλ
Destructive: OPD = (m + ½)λ
Applications
- • Anti-reflection coatings
- • High-reflectance mirrors
- • Optical filters
- • Interference patterns