Stray-light analysis for the SCORE coronagraphs of HERSCHEL.
The HERSCHEL (Helium Resonance Scattering in the Corona and Heliosphere) suborbital mission scientific payload consists of two extreme ultraviolet (EUV) coronagraphs forming the SCORE (Sounding Coronagraph Experiment) and an EUV Sun disk imager. The mission will be of great importance for the investigation of solar wind dynamics by obtaining the first global image of the Sun (disk and corona) in the He ii30.4 nm line. The most stringent requirement for the optical design of a coronagraph is stray-light reduction. We summarize the stray-light analysis for the SCORE coronagraphs, which are characterized by an innovative optical design, optimized for stray-light reduction.
Landini
Federico
F
Dipartmento di Astronomia e Scienza dello Spazio, Universitá di Firenze, Florence, Italy. flandini@arcetri.astro.it
Romoli
Marco
M
Fineschi
Silvano
S
Antonucci
Ester
E