What is an ellipsometer used for?

An ellipsometer is used for measuring the thickness and refractive index of thin films.

How does ellipsometry work?

Ellipsometry works by analyzing the change in polarization as light reflects from a film surface.

Industries such as semiconductor manufacturing, optics, and materials science use ellipsometers.

Yes, ellipsometers can analyze multiple film layers by interpreting polarization changes at each interface.