Optical Path Difference (OPD) Calculator

Posted by Dinesh on

Use this simple optical path difference (OPD) optics calculator to calculate phase shift which happens between two previously coherent sources when passed through different mediums online.

Optical Path Difference Calculation


OPD = [d1×n1] - [d2×n2]

d1 & d2 are the distances of the ray passing through medium,
n1 - is the greater refractive index (eg: glass),
n2 - is the smaller refractive index (eg: air),
OPD - optical path difference.