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Mid-infrared filters for astronomical and remote sensing instrumentation

Hawkins, G. J., Sherwood, R. and Djotni, K. (2008) Mid-infrared filters for astronomical and remote sensing instrumentation. In: Kaiser, N., Lequime, M. and Mcleod, H. A. (eds.) Advances in optical thin films III. Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE), 7101. SPIE, 10114 -10114. ISBN 9780819473318

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To link to this article DOI: 10.1117/12.796635

Abstract/Summary

As improvements to the optical design of spectrometer and radiometer instruments evolve with advances in detector sensitivity, use of focal plane detector arrays and innovations in adaptive optics for large high altitude telescopes, interest in mid-infrared astronomy and remote sensing applications have been areas of progressive research in recent years. This research has promoted a number of developments in infrared coating performance, particularly by placing increased demands on the spectral imaging requirements of filters to precisely isolate radiation between discrete wavebands and improve photometric accuracy. The spectral design and construction of multilayer filters to accommodate these developments has subsequently been an area of challenging thin-film research, to achieve high spectral positioning accuracy, environmental durability and aging stability at cryogenic temperatures, whilst maximizing the far-infrared performance. In this paper we examine the design and fabrication of interference filters in instruments that utilize the mid-infrared N-band (6-15 µm) and Q-band (16-28 µm) atmospheric windows, together with a rationale for the selection of materials, deposition process, spectral measurements and assessment of environmental durability performance.

Item Type:Book or Report Section
Refereed:Yes
Divisions:Faculty of Science > School of Systems Engineering
ID Code:4704
Uncontrolled Keywords:Infrared; optical; instruments; filters; coatings; fabrication; spectral; materials
Additional Information:Conference on Advances in Optical Thin Films III Glasgow, SCOTLAND, SEP 02-03, 2008 SPIE; Scottish Optoelect Assoc. Proceedings paper. Article no. 710114
Publisher:SPIE

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