[12593] in Cypherpunks
Re: CU Crypto Session Sat
daemon@ATHENA.MIT.EDU (Phil Karn)
Wed Apr 27 18:00:31 1994
Date: Wed, 27 Apr 1994 14:49:22 -0700
From: Phil Karn <karn@qualcomm.com>
To: mccoy@ccwf.cc.utexas.edu
Cc: cypherpunks@toad.com
In-Reply-To: <199404272041.PAA11305@flubber.cc.utexas.edu> (message from Jim McCoy on Wed, 27 Apr 1994 15:41:02 -0500 (CDT))
>They do not need to be joined. There already exist examples of "large"
Okay, "joined" in the sense that the light collected by each mirror must
be added coherently to produce the final image. This coherent addition
requires precise control of the phase of each component to a small fraction
of a wavelength. This is hard.
Someday there may be phased array antennas operating at optical wavelengths.
Not yet.
Phil
