Measurement of optical constants n and k of lexan and polyimide

Antonella Cavadi; Maria Antonella Artale; Marco Barbera; Alfonso Collura; Forbes R. Powell; Salvatore Varisco

doi:10.1117/12.366568

22 October 1999 Measurement of optical constants n and k of lexan and polyimide

Antonella Cavadi, Maria Antonella Artale, Marco Barbera, Alfonso Collura, Forbes R. Powell, Salvatore Varisco

Proceedings Volume 3765, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X; (1999) https://doi.org/10.1117/12.366568
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

We present preliminary results on a program aimed at characterizing the optical properties of materials of potential usage in filters for soft x-ray detectors. In particular, we discuss a method that we have used to derive and model the refractive index n and the extinction coefficient k of thin plastic film materials. The method is based on best fit estimates of the parameters of a quanto- mechanical model describing k. The value of n is then evaluated using the Kramers-Kronig relationship. This method has provided accurate values of previously unknown optical constants of polyimide and lexan allowing to model the transmission of multilayer filters such as the aluminized polyimide filters of the HRC on board Chandra X-ray Observatory.

Citation Download Citation

Antonella Cavadi, Maria Antonella Artale, Marco Barbera, Alfonso Collura, Forbes R. Powell, and Salvatore Varisco "Measurement of optical constants n and k of lexan and polyimide", Proc. SPIE 3765, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X, (22 October 1999); https://doi.org/10.1117/12.366568

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