Fabrication of high-precision solar filters: variety and limitations

Abstract

Using H-alpha etalon-based solar filter as an example, we address the issues of practical realization of etalon-based filters used for solar astronomy and other related applications. The design rationale as well as the choice among two conventional formats of etalons is described, depending on the requirements on the devised solar filter.

Education and public outreach at the Carl Sagan Solar Observatory of the University of Sonora

“…Another recent innovation has been the development of precision narrowband solar filters pioneered by Sidorin et al [13,14] . He and Coronado Instruments Inc. developed Fabri Perot interferometers (etalons), which have advantages over other filters, such as not requiring power for operation.…”