1 October 1997 Ultraviolet Ca K-line narrow-bandwidth imaging filters based on holographic Bragg gratings in photorefractive materials
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Optical Engineering, 36(10), (1997). doi:10.1117/1.601311
Abstract
Current narrow-band optical filters for professional solar astronomy applications are primarily based on Lyot filters.1 However, the Lyot filter is severely limited in operation at UV wavelengths because of the lack of suitable UV hightransmission polarizers. In addition, the Lyot filter is comprised of over 50 elements ~over 30 cm long and weighing several kilograms! that require precise alignment and temperature stabilization for all of the elements.
Feng Zhao, Koichi Sayano, Harold E. Miller, Jason Corwin, Nicolette Werner, "Ultraviolet Ca K-line narrow-bandwidth imaging filters based on holographic Bragg gratings in photorefractive materials," Optical Engineering 36(10), (1 October 1997). http://dx.doi.org/10.1117/1.601311
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KEYWORDS
Optical spheres

Optical filters

Diffraction

Diffraction gratings

Crystals

Ultraviolet radiation

Absorption

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