Physics – Instrumentation and Detectors
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4008.1368c&link_type=abstract
Proc. SPIE Vol. 4008, p. 1368-1375, Optical and IR Telescope Instrumentation and Detectors, Masanori Iye; Alan F. Moorwood; Eds.
Physics
Instrumentation and Detectors
2
Scientific paper
Advances in thin film technology in recent years are providing new possibilities for interference filters. The isolation of spectral bands for astronomical imaging is no longer limited to single segments of the electromagnetic spectrum. Multiple passband, or 'multi-band' filters can now be manufactured for simultaneous narrowband imaging at several widely separated wavelengths. Such filters provide major benefits to differential imaging with tunable filters since systematic uncertainties arising form atmospheric variations can be averaged out. A multi-band thin film interference filter has been manufactured specifically for passbands at H(alpha) and H(beta) . In tandem with the AAOs TAURUS Tunable Filter and charge shuffling techniques, this double-band filter allows for accurate mapping of the local dust extinction and star formation rates in nearby spiral galaxies. Additional filter designs for a variety of emission-line combinations and their scientific applications are also discussed.
Bland-Hawthorn Joss
Cianci Sonia
O'Byrne John W.
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