Evaluation of toroidal gratings in the EUV.
Abstract
Toroidal gratings can be used for imaging spectrometers. These can provide stigmatic images and are very useful for space applications. Two cases are described: an Ultraviolet Coronagraph for the solar SOHO mission and a high resolution spectrometer for the stellar Lyman mission. The toroidal gratings have been produced by replicating an elastically deformed spherical one. By properly applying the distorting forces also coma-corrected surfaces can be achieved.
- Publication:
-
X-ray instrumentation in astronomy II
- Pub Date:
- January 1988
- DOI:
- 10.1117/12.948734
- Bibcode:
- 1988SPIE..982..372H
- Keywords:
-
- Coronagraphs;
- Gratings (Spectra);
- Ultraviolet Spectrometers;
- Emission Spectra;
- European Space Agency;
- High Resolution;
- Soho Mission;
- Solar Atmosphere;
- Stigmatism;
- Toroids;
- Instrumentation and Photography;
- Gratings: UV Radiation;
- Gratings: Space Instrumentation