Cooled optical filters for Q-band infrared astronomy (15-40 μm)

Hawkins, G., Sherwood, R., Djotni, K. and Threadgold, T. (2016) Cooled optical filters for Q-band infrared astronomy (15-40 μm). In: Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation (Conference 9912), Coatings, Filters and Gratings [9912-110], 26 Jun - 01 Jul 2016, Edinburgh, United Kingdom. doi: 10.1117/12.2231669

Abstract/Summary

With a growing interest in mid- and far-infrared astronomy using cooled imaging and spectrometer instruments in high-altitude observatories and spaceflight telescopes, it is becoming increasingly important to characterise and assess the spectral performance of cooled multilayer filters across the Q-band atmospheric window. This region contains spectral features emitted by many astrophysical phenomena and objects fundamental to circumstellar and planetary formation theories. However extending interference filtering to isolate radiation at progressively longer wavelengths and improve photometric accuracy is an area of ongoing and challenging thin-film research. We have successfully fabricated cooled bandpass and edge filters with high durability for operation across the 15-30 µm Q-band region. In this paper we describe the rationale for selection of optical materials and properties of fabricated thin-film coatings for this region, together with FTIR spectral measurements and assessment of environmental durability.

Additional Information	Published as Cooled optical filters for Q-band infrared astronomy (15-40 μm). In: 2016 Navarro, R. and Burge, J. H. (eds.) Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II. SPIE, p. 991235. ISBN 9781510602038
Item Type	Conference or Workshop Item (Paper)
URI	https://reading-clone.eprints-hosting.org/id/eprint/65712
Identification Number/DOI	10.1117/12.2231669
Refereed	No
Divisions	Science > School of Mathematical, Physical and Computational Sciences > Department of Computer Science
Uncontrolled Keywords	Infrared, Thin-Film, Deposition, Optical, Filters, Spectral, Bandpass, Coatings
Additional Information	Published as Cooled optical filters for Q-band infrared astronomy (15-40 μm). In: 2016 Navarro, R. and Burge, J. H. (eds.) Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II. SPIE, p. 991235. ISBN 9781510602038
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