Performance comparison of two Wolter type II telescopes in the far ultraviolet
Abstract
Experimental results for image quality and scatter in far-UV light are used to choose between the conventionally polished Solar Extreme-Ultraviolet Rocket Telescope and Spectrograph (SERTS-A) and computer-controlled polished SERTS-C Wolter type II solar rocket telescopes for an extreme-UV flight instrument. In 124-nm light the SERTS-C telescope image had a 0.67-arcsec full width at half-maximum (FWHM), compared with a 1.25-arcsec FWHM for the SERTS-A telescope. In addition SERTS-C had twice the peak irradiance of SERTS-A and an order of magnitude lower near-angle scatter. The inflight performance of the telescopes is consistent with laboratory findings.
- Publication:
-
Applied Optics
- Pub Date:
- October 1995
- DOI:
- 10.1364/AO.34.006459
- Bibcode:
- 1995ApOpt..34.6459L
- Keywords:
-
- TELESCOPES;
- OPTICAL TESTING;
- IMAGE QUALITY;
- ULTRAVIOLET: FAR;
- SUN;
- SPACE OPTICS