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Hi all! I recently came across a listing of second hand beam expanders for a good price on a Chinese ebay-like site. They are used but are in good condition; no scratches on the lenses and only minor cosmetic damage to the anodizing. The seller is offering ten or so for sale, and so I purchased...

Those of you who have seen my thread Argon Ion Laser (Worth the Gamble?) will know I have been on the lookout for an argon ion laser to kick-start my gas laser collection. Through the process of purchasing and operating such a laser, I have gained experience and knowledge about some things that...

I was scrolling through a Chinese ebay-like auction site when I stumbled across a listing for an argon laser. The seller claims he doesn't know what it is, and is selling it as is for approximately $40. The laser looks to be missing the PSU, but have absolutely no experience with gas lasers I...

Hello everyone! After a four year hiatus, I have decided to get back into the Laser building community. I am currently an international student in Beijing, China and am a high school senior. I have a diverse range of hobbies, including amateur chemistry, woodworking, metalworking and of course...