[12590] in Cypherpunks
Re: CU Crypto Session Sat
daemon@ATHENA.MIT.EDU (Jim McCoy)
Wed Apr 27 16:47:43 1994
From: Jim McCoy <mccoy@ccwf.cc.utexas.edu>
To: karn@qualcomm.com (Phil Karn)
Date: Wed, 27 Apr 1994 15:41:02 -0500 (CDT)
Cc: cypherpunks@toad.com
In-Reply-To: <199404271854.LAA07395@servo.qualcomm.com> from "Phil Karn" at Apr 27, 94 11:54:43 am
Phil Karn <karn@qualcomm.com> writes:
[sat stuff and big mirrors...]
> >Mirrors could be sectional. Many mirrors can be joined together into a much
> >larger mirror. Take a look at those put it together yourself model kits.
>
> Remember that when they're joined, they must maintain an accuracy of a
> small fraction of a wavelength to not spoil the results.
They do not need to be joined. There already exist examples of "large"
telescopes on the ground that combine the light received by multiple
smaller mirrors into a single "synthetic image." The individual mirrors
can be small for easy transportation and can be added over time to keep
increasing the resolution...
jim
