Here I will share photos of the lasers I currently have in my collection. Approximately it contains about 60 laser heads, laser tubes, laser pumping chambers and about 15 laser related equipment like associated to laser heads power supplies, cooling machines, dye circulators etc. Less than a half of them is operational and can give laser beams. I will post here only those lasers that are operational, some of them are in quantity more than 1. Each post will be about one of the lasers, because it is quite difficult to write a HUGE post with loads of photos.
1)
So, to start with, I'll show a small He-Ne laser designed for school physics lessons. It is called LGN-109 and has 1 mW output on 632.8 nm line. Its main feature is that it has a transparent cover made of acrilic glass, so all insides of it can be seen. the power supply is built in and consists of a simple mains line HV transformer, multiplier and ballast resistors.