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Details on Meade's LX800 ACF design

Started by JJM, 04/13/2012 02:27PM
Posted 04/13/2012 02:27PM Opening Post
An appendix in the user manual for Meade's new LX800 ACF scopes offers interesting details on the optical design:

"In the ACF design shown above, light enters from the right, passes through a thin lens with 2-sided aspheric correction (“correcting plate”), proceeds to a spherical primary mirror, and then to a hyperbolic secondary mirror."

This is the first time I've seen any mention of a two-sided figure on the corrector plate, and the first confirmation that the figure used on the secondary mirror is a hyperbola. The two-sided corrector must be made using a different process than the single-side figure used on a traditional Schmidt corrector.


Page 55 in: http://meade.com/software-manuals/telescope-manuals/lx-series?download=15:lx800

Jim McSheehy
Posted 04/14/2012 06:30PM #1
I have old Meade literature that shows the same: they use a double-sided corrector (Celestron is single sided), and that the secondary is a hyperboloid. I think they have used this design since their first SCTs in the 1980's.