Game: Guess the mystery object !

[ekeup]

Those look like something I've seen before. I just can remember specifically what they are.

Maybe some type of "master" discs for duplication? Like a CD master?

Has nothing to do with duplication.

 

[Bluefan]

That q-switch was really easy. For the current one I can only guess. Does it has something to do with material processing?

 

[LaserCo]

I just came to this thread for my first time, looks like fun, I recognized that AOM in an instant too!

I am now confused, Sigarthur posted this image below then later responds as if he is trying to answer also!?
We are trying to guess what this is right?
image deleted, was a nuisance every refresh!

 

[LaserCo]

My guess is it is some sort of antenna radiance computation chart

 

[Bluefan]

That's a smith chart, I recognise it from network analyzers but it was already guessed. ekeup has put something up.

 

[ekeup]

Current item....

It has nothing to do with material processing.

 

[ekeup]

Hint: about 2000 were made and each one used for about 45 minutes.
Correction: over 4000 were made.

 

[divindavid]

Looks like some sort of older data storage unit.

 

[LaserCo]

an abrasive disc for polishing?

 

[weeba2kv]

They are used to ( trying ) to detect black holes in space

 

[ekeup]

Looks like some sort of older data storage unit.

Nope

an abrasive disc for polishing?

Nope

They are used to ( trying ) to detect black holes in space

Not really.

Another hint: there can be up to 640 holes in each. (not counting the outside mounting holes)

 

[skir0987]

Plug plates used for spectral analysis of stars

Like this:
http://sdss3.files.wordpress.com/2010/11/plugplates.jpg

 

[weeba2kv]

I remember something with those plates from that tv serie Curiosity - Discovery Channel

 

[ekeup]

Plug plates used for spectral analysis of stars

Like this:
http://sdss3.files.wordpress.com/2010/11/plugplates.jpg

Correct, these in particular were used in the SDSS (Sloan Digital Sky Survey)

 

[skir0987]

Alright, I've got one:

 

[ARG]

A hand powered vacuum cleaner?