An Imaging, Tunable Magneto-Optical Filter

Details An Imaging, Tunable Magneto-Optical Filter An Imaging, Tunable Magneto-Optical Filter

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..122..365l&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 122, no. 2, 1989, p. 365-380. Research supported by the Research Corp.

Physics

Optics

1

Image Filters, Imaging Spectrometers, Magneto-Optics, Optical Filters, Solar Spectra, Charge Coupled Devices, Doppler Effect, Solar Interior

Scientific paper

The Imaging, Tunable Magneto-Optical Filter (ITMOF) is a one- or two-cell magnetic birefringence filter designed to measure the Doppler shift of the solar potassium line (770 nm) with respect to a laboratory standard. Two gas vapor cells contain isotopically refined potassium and operate at temperature near 393 K. Hot cell windows are employed in a carefully controlled thermal environment to limit spurious birefringence in the pyrex cell and prevent condensation in the light path. Electromagnets provide a variable strength and direction longitudinal magnetic field of up to 5000 G on each cell. There is no rotating quarter-wave plate or other moving parts. The final image is detected with a CCD camera system.

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