Author Topic: Hyperbolic mirror 10" F-2.8 with 4-elements corrector optic design for Astrograp  (Read 26 times)

Jeffrey Hunter

  • Active Astronomer
  • ***
  • Posts: 116
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Hi all,
Haven't been here for quick a while.
After done some research in optic design, I come out with this 10" (250mm) F2.8 system.
*It has hyperbolic main mirror with cc=-2.166; ----will have it done and coated by vendor.
*It has 28% obstruct in diameter, it is pretty small considering a F2.8 visual system.
*The corrector has 4 elements in 2 groups, each group contains 2 lens, LaK and ED glass have been introducted to reduce aberration. ---- will have it done and coated by vendor.
*It has 3 degree(36mm disk) designed field of view in terms of diffraction limited. and will still have cool quality image at 5 degree edge(60mm disk).
Preliminary tolerance analysis shows it has good result, so I post the whole data here to get some advice or thoughts. Thanks for any help!