Abstract

A tin–polyimide and an indium–polyimide soft x-ray bandpass filter were fabricated with thicknesses of 1400 and 1750 Å for the metal and polyimide components, respectively. The transmission of each filter was measured at the Stanford Synchrotron Radiation Laboratory. The transmission of the tin–polyimide filter was found to be ~40% for radiation with wavelengths between 60 and 80 Å. The transmission of the indium–polyimide filter was greater than 40% between 70 and 90 Å. The indium was ~5% more transmissive than the tin and attained a maximum transmission of ~48% at 76 Å. Such filters have potential applications to soft x-ray telescopes that operate in this region. They might also be of interest to investigators who work with x-ray microscopes that image live biological specimens in the 23–44-Å water window.

© 1993 Optical Society of America

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