Design and fabrication of multilayer reflective filters for a Ritchey-Chretien Lyman-alpha telescope

Jungho Park; Muamer Zukic; Michele Wilson McColgan; Charles E. Keffer; Douglas G. Torr; Richard B. Hoover

doi:10.1117/1.600684

1 May 1996 Design and fabrication of multilayer reflective filters for a Ritchey-Chretien Lyman-alpha telescope

Jungho Park, Muamer Zukic, Michele Wilson McColgan, Charles E. Keffer, Douglas G. Torr, Richard B. Hoover

Optical Engineering, Vol. 35, Issue 5, (May 1996). https://doi.org/10.1117/1.600684

We report the design and fabrication of multilayer reflective filters for the self-filtering cameras of a Ritchey-Chretien Lyman-a (Ly-a) telescope that uses reflecting multilayer mirrors, polarizers, and filters. The Ly-a telescope is designed to measure the linear polization of hydrogen Ly-a line (121.6 nm) emissions from the solar corona. A key element of the filter design includes the development of p multilayers optimized to provide maximum reflectance at 121.6 nm for the respective cameras without significant angular variation from 0 to 15-deg incident angles. We applied self-filtering concepts to design Ly-a telescope filters that are composed of two reflective mirrors. The calculated value of the net throughput is 28.38% with a 4-nm bandwidth at a center wavelength of 121.6 nm. The measured value is 27.35% with a less than 6-nm bandwidth at incidence angle 10 deg.

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Jungho Park, Muamer Zukic, Michele Wilson McColgan, Charles E. Keffer, Douglas G. Torr, and Richard B. Hoover "Design and fabrication of multilayer reflective filters for a Ritchey-Chretien Lyman-alpha telescope," Optical Engineering 35(5), (1 May 1996). https://doi.org/10.1117/1.600684

Published: 1 May 1996

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