[Laser] Looking for ideas on building simple optics for an optical beacon

[Kerry Banke]

Our current optical beacon on San Miguel Mt. in San Diego is basically a 1W 
red Luxeon (about 50 lumens) with the 30 degree total beam width lens 
unit.  Just as a reference, my 4" glass lensed PGP type receiver using an 
SFH203 photo diode produces a signal about 35 dB above the noise on 
Spectrum Lab running a 1Hz BW (725 Hz carrier). The next step is to try 5 
of the newer Luxeons with 190 Lumens each and some type of optics.    What 
options are there to devise simple optics to narrow down the vertical 
beamwidth to perhaps 5 degrees while keeping the horizontal beam 
width  wide? I'd like to reduce the waisted vertical beam width. I have 
thought about trying some form of corner reflector ( or optical horn) type 
experiments using 12" mirror tiles. Any thoughts? Also  - I just received a 
rifle scope with illuminated cross hair. The illumination is adjustable and 
really solves the problem of having the cross hair disappear when working 
in the dark.
Thanks -Kerry N6IZW -