Calculators

Prism Diopter

Δ ↔ cm deviation, degrees, Prentice's rule

PrismΔDistancemor deviationcm

Enter values to calculate

Reference

1 Δ deviates light 1 cm at 1 m. 1° ≈ 1.75 Δ.

Prentice's rule: Δ = c × F. Plus lens: base toward the optical centre lies opposite to the decentration direction; minus lens: base in the direction of decentration.