Old RCA Ion Laser

[Eidetic]

It's been a while since I posted any pics of old lasers, so here's one. It's a 1967 RCA model LD-2100 argon ion laser system.



This one has it with the cover off, showing the plasma tube. I also removed a shield to show the little magnets around the center section. Aint they cute? And dig those big round Brewster windows!



And here's its big brother, the model LD-2101. This one is missing its plasma tube but there are parts of it clinging to some wires inside. This head weighs a ton, with its cast iron exoresonator. Love those coordinated adjuster handles!!! These both have a super "Jetsons" look, don't they?

[sugeek]

Thanks Bob, I always love your posts.

[chad]

That is really cool.

Any idea what it is supposed to put out?

Chad

[Eidetic]

The LD-2100 had output of 100mW, had a prism in front of the HR to give wavelengths between 4880nm and 5145nm, and cost $9850 new in the Summer of Love. The LD-2101 put out 1W and cost $19,500 new. Both were air cooled.

My collection is up over 90 lasers now, with another hundred artifacts like plasma tubes, meters and orphaned supplies, and about 150 books and periodicals about lasers in the '60s. They are taking over my house! And garage. And there are another 8-10 waiting for me in LA and about 5-8 in the midwest that I need to find a cheap way to move out to California.

[Xytrell]

Air cooled? Where's the fan? Where are the beefy heat sinks?

Did they just run them stupid-hot and not expect them to last over 100 hours?

[Jem]

Brilliant post Bob... I love this old stuff, keep 'em coming

[142laser]

OK Bob you can't fool me...that is an Electrolux vacuum cleaner right? Sam needs to post pics of "our" 1967 prototype pulsed Argon. It has the same style large Brewster windows...and it still works. Or it did...Phil

[GregR]

That laser looks in great shape for its year.

Does anyone have a photograph to post showing a CO2 laser tube with brewster windows? I want to see how to get S or P polarization out of the tube. There are a lot of old diagrams of CO2 lasers with salt windows but I can't seem to find a photo.

[Eidetic]

"P" and "S" refer to the plane of incidence for the beam going through the window. That's the plane formed by the beam and the normal to the surface. "P" polarization is parallel to the plane, "S" is perpendicular to it. In the laser shown above, "P" is vertical, "S" is horizontal.