ISSN:
1572-9508
Keywords:
Fabry-Perot filter
;
Solar instrument
;
Lithium niobate
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We have made a narrow band tunable filter for solar observations using a Lithium Niobate Fabry-Perot etalon. The 60 mm aperture etalon with a free spectral range of 4.22 Å and finesse of 26 at λ = 6122 Å has been procured from CSIRO, Australia. The wavelength tuning is achieved by applying high voltage to the etalon substrate at the rate of 0.45 Å per 1000 Volts. The filter is being used for imaging the sun in Hα line and obtaining Doppler- and Magnetogram in CaI 6122 Å line. In this paper, we present some initial observations carried out with this filter at Udaipur Solar Observatory.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007927214812