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28 June 2017 Directly deposited optical-blocking filters for single-photon x-ray imaging spectroscopy
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Directly deposited optical-blocking filters (DD OBFs) have the potential to improve filter performance and lower risk and cost for future x-ray imaging spectroscopy missions. However, they have not been fully characterized on high-performance charge coupled devices (CCDs). This paper reports the results of DD OBFs processed on high-performance photon-counting CCDs. It is found that CCD performance is not degraded by deposition of such filters. X-ray and optical transmission through the OBF is characterized and found to match theoretical expectation. Light-leaks through pinholes and the side and back surfaces are found to lower the optical extinction ratio; various coating processes are developed to resolve these issues.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE) 2329-4124/2017/$25.00 © 2017 SPIE
Kevin K. Ryu, Marshall W. Bautz, Steven E. Kissel, Peter O'Brien, and Vyshnavi Suntharalingam "Directly deposited optical-blocking filters for single-photon x-ray imaging spectroscopy," Journal of Astronomical Telescopes, Instruments, and Systems 3(3), 036001 (28 June 2017).
Received: 14 February 2017; Accepted: 2 June 2017; Published: 28 June 2017

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