Hi,please can any one give me the refractive index of CR39 at wavelength of Arf laser (193 nm)?

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Boris L. Glebov

Someone else gave a short answer that might be helpful: https://www.researchgate.net/post/What_are_the_Sellmeier_coefficients_for_CR-39_polymer

In general, refractiveindex.info is very useful, but they don't seem to have what you need for CR39.

Shigeo Kubota

Rana, This site may give answer to your question. Currently, they plot in visible wavelength region but not in deep UV region.

http://www.filmetrics.com/refractive-index-database/CR39/CR-39

Regards, Shigeo.