Abstract

We describe the properties of the Zeiss Universal Birefringent Filter and its optical and electronic interface with the Sacramento Peak Observatory's vacuum telescope. The instrument permits observations of solar intensities, velocities, and/or magnetic fields in rapid succession in any Fraunhofer line in the 410–700-nm wavelength region with high spectral (0.004–0.013 nm) and high spatial (∼1/3 sec of arc) resolution.

© 1975 Optical Society of America

Tunable liquid-crystal filter for solar imaging at the He i 1083-nm line

G. A. Kopp, M. J. Derks, D. F. Elmore, D. M. Hassler, J. C. Woods, J. L. Streete, and J. G. Blankner
Appl. Opt. 36(1) 291-296 (1997)

Derivation of the universal wavelength tuning formula for a Lyot birefringent filter

Laurence J. November and F. R. Stauffer
Appl. Opt. 23(14) 2333-2341 (1984)

In situ calibration of tunable filters: Lyot and Michelson

Jason Mudge and Theodore Tarbell
Appl. Opt. 53(22) 4978-4986 (2014)

Improvement of Birefringent Filters. 3: Effect of Errors on Wide Field Elements

Alan M. Title
Appl. Opt. 14(2) 445-449 (1975)

Improvement of Birefringent Filters. 2:Achromatic Waveplates

Alan M. Title
Appl. Opt. 14(1) 229-237 (1975)