Khaled wrote:
>
> Hi All,
> I am trying to decide between a 543 HeNe line or 568 Kr laser for the
> green line for a confocal system beside the longer life of the HeNe
> and the better seperation from the 488 with the Kr are there any
> other factors I should take into account?


Power.  The last that I knew, it was difficult to find a 543 nm HeNe
with greater than about 1 mW.  (If this has changed, I'd be delighted to
know!)  The 568 nm line of a Kr-Ar can be considerably higher.

Good luck!

Maratin Wessendorf
--
Martin Wessendorf, Ph.D., Assoc. Professor      office: (612) 626 0145
Dept. Neuroscience                              lab:    (612) 624 2991
University of Minnesota                         FAX:    (612) 624 8118
Minneapolis, MN  55455                e-mail: [log in to unmask]