Title

Impact Of Surface Roughness On The Scatter Losses And The Scattering Distribution Of Surfaces And Thin Film Coatings

Keywords

light scattering; power spectral density; roughness

Abstract

The estimation of the impact of surface roughness on the light scattering losses and the scattering distribution is of crucial importance for deriving roughness specifications for optical surfaces. A detailed roughness analysis should always be based on surface Power Spectral Density functions and the band-limited roughness relevant for the application at hand. The scattering from single surfaces can easily be estimated using rather simple formulas. The most commonly used expression to estimate the total scattering, however, is only valid if the roughness is small and the correlation width is large compared to the wavelength of light. A special expression has been used in the thin film community for surface structures with short correlation lengths. It will be demonstrated that distinguishing between these limiting cases is unnecessary simply by using the concept of band-limited roughness. Different models are compared to results of scatter measurements and discussed with respect to their ranges of validity. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Publication Date

11-8-2011

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

8169

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.896989

Socpus ID

80355123686 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/80355123686

This document is currently not available here.

Share

COinS