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Mirror corrector for a 10 meter fast speed parabola

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Dave Shafer
Dave Shafer

A very simple subaperture mirror corrector is shown that corrects the coma and astigmatism of a 10 meter diameter f/0.7 fast speed parabolic mirror

Engineering
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Dave Shafer David Shafer Optical Design Fairfield, CT 06824 203-259-1431 shaferlens@sbcglobal.net Simple mirror corrector for a huge fast speed parabolic mirror
The aberration theory behind this very simple design is explained in my Slideshare post at https://www.slideshare.net/operacrazy/gregorian-telescope-designs It is remarkable that the extremely high level of correction (on a slightly curved image surface) of this huge very fast f/.7 speed parabolic mirror is accomplished with just three subaperture corrector elements – the small conic secondary mirror (a pure conic, easily testable at its foci) only 10% of the diameter of the big primary mirror, and two tiny (in relative size) low order aspheric mirrors near the intermediate image.

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Mirror corrector for a 10 meter fast speed parabola

  • 1. Dave Shafer David Shafer Optical Design Fairfield, CT 06824 203-259-1431 shaferlens@sbcglobal.net Simple mirror corrector for a huge fast speed parabolic mirror
  • 2. The aberration theory behind this very simple design is explained in my Slideshare post at https://www.slideshare.net/operacrazy/gregorian-telescope-designs It is remarkable that the extremely high level of correction (on a slightly curved image surface) of this huge very fast f/.7 speed parabolic mirror is accomplished with just three subaperture corrector elements – the small conic secondary mirror (a pure conic, easily testable at its foci) only 10% of the diameter of the big primary mirror, and two tiny (in relative size) low order aspheric mirrors near the intermediate image.