Refractive Index of Fused Silica

Sellmeier equation (Malitson 1965), λ = 0.25 – 2.5 μm

Sellmeier Equation

n²(λ) = 1 + Σ Bᵢ·λ² / (λ² − Cᵢ)

B₁ = 0.6961663,  C₁ = 0.0684043²
B₂ = 0.4079426,  C₂ = 0.1162414²
B₃ = 0.8974794,  C₃ = 9.896161²