To: atm{at}shore.net
From: Jim Burrows 
Reply-To: Jim Burrows 


At 17:19 2003-07-23 +0930, Mike wrote:

>Am I biting off more than I can chew to try and polish
>this lens to a hyperbola using through the back testing and the system
>testing with the star test?  Thanks and best regards.

I think it's a reasonable way to go.  I've never done a through-the-back
secondary test, but I did a non-null Hindle sphere secondary test which is
somewhat the same, involving
ray-tracing:  source-secondary-sphere-secondary-tester.  In a
through-the-back test, the ray-trace would be source-(refraction at back
surface)-front surface-(refraction at back surface)-tester.  A mask on the
back surface would make the test quantitative.

         -- Jim Burrows
         -- mailto://burrjaw{at}earthlink.net
         -- http://home.earthlink.net/~burrjaw
         -- Seattle N47.4723 W122.3662 (WGS84)

--- BBBS/NT v4.01 Flag-5