• HOME
  •   ABOUT
  •    CONTACT
  • ASTROGRAPH
    • Special features
    • Product Reviews
    • Sky & Telescope video
    • Applications »
      • Astro Imaging
      • Satellite Metrics
      • Science
    • Optical System »
      • Optical Design
      • Dual Configuration
      • Field Correctors
      • What is a CDK?
    • Mechanical Design »
      • Overview
      • Opto-Mechanical Design
      • Robust Spider Assembly
      • Heavy-duty mirror cell
      • Heavy Accessories
      • Collimation
      • OTA Cover
    • Electronics
    • Development Team
    • Specifications
    • Accessories
    • Pricing
    • Downloads
  • IMAGE GALLERY
    • Galaxies
    • Nebulae
    • Clusters
    • Lunar
    • Videos
  • DESIGN CONSULTING
  • CUSTOM OPTICS
    • Space Optics
    • Optical Fabrication
  • OPTICAL TESTING
    • Fringe Analysis
    • Interferometry
    • Reference Element
    • Ross Null Lens
    • Using the Ross Null Lens

Wide Field Cassegrain Telescope

This article presented at (SAS)
Society for Astronomical Sciences 2011.

Abstract

Of all the conventional astronomical telescope designs used in amateur astronomy, the Cassegrain is the least likely to be considered a candidate for wide field imaging applications. This perception is a hangover from the era of visual observing where minimizing the central obscuration was critical to preserving image fidelity. The resulting long focal length, slow telescopes did not lend themselves to photography. This article illustrates the use of an internal aperture stop in a high speed, wide field Cassegrain optical system. The astrograph features a well corrected and uniformly illuminated focal plane. Opto-mechanical design and manufacturing issues are also discussed.

Download the PDF

© copyright 1994-2012 Ceravolo Optical Systems