[Laser] Re: Non-imaging optics - again

[Bob Williams]

On Monday 13 January 2003 19:55, you wrote:
> If you want to look at a small, distant source as in a data link, either a
> lens or concave mirror is a much better choice. After all, the only light
> you really want to collect comes directly from the source. 

Yes, quite true.  That is _not_ what I want to do.  I believe that scattered 
light from cloudbounce and clear sky scattering will be a large, diffuse 
source - hence the interest in non-imaging optics.

73,

Bob, AA1ZC
FN31xk