Measurement of optical constants n and k of Lexan and polyimide

被引：13

作者：

Cavadi, A ^{[1
]}

Artale, MA ^{[1
]}

Barbera, M ^{[1
]}

Collura, A ^{[1
]}

Powell, FR ^{[1
]}

Varisco, S ^{[1
]}

机构：

[1] Ist GS Vaiana Palermo, Palermo, Italy

来源：

EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY X | 1999年 / 3765卷

关键词：

X-ray; astronomy; instrumentation; filters;

D O I：

10.1117/12.366568

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present preliminary results on a program aimed at characterizing the optical (10 - 10000 Angstrom) 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 le. 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.

引用

页码：805 / 815

页数：11

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