I know many on the group are aware of Evergreen laser but thought I would let the group know of my recent experience with them. 4 years ago Evergreen refurbished the plasma tube of a Coherent 90-5 Argon Laser for me (actually a conversion from krypton to argon 90-K to 90-5). It is still going strong. Recently my other 90-5 which I use primarily for UV needed to be refurbished. This tube had a new Coherent tube put in at about the same time as Evergreen rebuilt that other one. As I recall the max UV power was about 400mW. My memory from some time back was that Evergreen could not effectively refurbish an argon for UV due to patent issues held by Coherent on the Brewster windows. That patent has now run out and Evergreen told me they can now do this and in fact have their own source of Brewster windows that they claimed were better than the original Coherent ones. Must be true. I sent Evergreen the laser and it came back last week - over 700mW 350-360! Needless to say I'm extremely pleased with their work and service. I won't quote the price but it was about 25% of the cost of a new tube. If you need a UV tube rebuilt I strongly recommend Evergreen. Larry Note: I have no financial interest in Evergreen - just a very satisfied customer. Larry W. Arnold, Ph.D. Res. Assoc. Prof. Director, Flow Cytometry Facility Department of Microbiology and Immunology Lineberger Comprehensive CAncer Center CB# 7290 University of North Carolina at Chapel Hill Chapel Hill, NC 27599 Phone: 919-966-1530 FAX: 919-962-8103
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