• Effects of various ambient-aging processes in chopped and non-chopped optical films

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      https://www.ias.ac.in/article/fulltext/pram/028/03/0277-0285

    • Keywords

       

      Optical films; aging; chopped films

    • Abstract

       

      The effects of various ambients on the non-chopped and chopped films of cryolite, MgF2 and mixed cryolite-MgF2, as measured by ellipsometer, are reported. The moisture decreases the refractive index whereas an increase is observed in air and other ambients. In all the ambient-aging the chopped films show smaller changes (nearly half) in refractive index than non-chopped films. Aging seems to be due to three main processes, a long-term adsorption-like surface reaction and two short-term reactions.

    • Author Affiliations

       

      K Vijaya1 R K Puri1 R N Karekar1

      1. Department of Physics, University of Poona, Pune - 411 007, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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