Wide-field Corrector for a Gregory Telescope

  title={Wide-field Corrector for a Gregory Telescope},
  • V.Yu.Terebizh
  • Published 2006
  • Physics
  • A form of prime focus corrector for the Gregory system is proposed that provides the sub-arcsecond field of view up to 3 degrees in diameter for the spectral range 0.35-0.90 microns. The corrector includes five lenses made of same glass (fused silica is preferable). The distinctive feature of the corrector consists in dissimilar use of the central and edge zones of a front lens disposed in the exit pupil of a two-mirror system. As an example, the f/1.9 telescope is considered with the 6.5-m… CONTINUE READING