Thanks, left message for him with what I need.
Does anyone here have experience crunching numbers to determine the amount of expansion I can get when using an IR diode with a 100um emitter size and 30 degree beam (actually, 100x1 and 8/30) straight into a PCX collimator with a 250mm FL? I could use the help to verify my own figures.
I've read there is a general rule of thumb for astronomy telescopes of no more than 60X magnification per inch of refractor lens diameter, but I don't know if this also applies to expanding a laser beam too, but since a BE is essentially a telescope, I'm guessing the same applies, does it? I've tried googling searching for the limitations of the amount of expansion I can achieve using a refracting BE, but unable to find the information yet.
Glowing green eyes is a camera photoflash reflection.