How to Calculate Radius of Curvature from Thin Film Interference?

[Emily_Khan]

Hello, I have a question about interference.

I have interference from thin film, i.e. fringes of equal inclination. How I can calculate the radius of sample curvature from the interference pattern? How I can to determine the maximum radius of curvature of the surface at which interference will be observed?

 

[berkeman]

Hello, I have a question about interference.

I have interference from thin film, i.e. fringes of equal inclination. How I can calculate the radius of sample curvature from the interference pattern? How I can to determine the maximum radius of curvature of the surface at which interference will be observed?

Welcome to the PF, Emily.

Are you saying your thin film is curved? Is it curved in 1 dimension or two? Can you post a picture or a diagram to clarify your question? Thanks.

 

[jtbell]

Are you dealing with something like Newton's rings?