optical moment

optical moment

[′äp·tə·kəl ′mō·mənt]
(optics)
For a ray of light passing through an optical system, the triple product of a vector from an arbitrary origin on the optical axis to a point on the ray, a vector tangent to the ray at that point whose length equals the refractive index, and a unit vector along the optical axis; it does not depend on the point on the ray.
References in periodicals archive ?
The optical moments are related to the macroscopic quantities like effective dielectric constant and effective number of valence electrons in materials investigated (20).
These parameters are measure of the average bond strength and the optical moments are related to the macroscopic quantities like effective dielectric constant, effective number of valence electrons in materials investigated [18].