EG&G Power Meter

[mikkojay]

Anyone have any experience with these? I got the bidding bug and bought one on ebay. I missed out on an older coherent 201 with the thermopile, kicked myself for missing that one- it went for about 60 bucks.
EG&G MODEL 460-1A LASER POWER METER W/ EG&G 460-2 SILICON DETECTOR
I just want to be able to measure stuff in the 100-200mw range
Thanks, Mike

[GooeyGus]

Well, depending on the head/meter, it may be designed to only measure one specific wavelength. have any more pictures?

[mikkojay]

I don't have it yet, but I did find a manual on the web that says there is a wavelength selector switch on the back of the head. The manual also mentions an attenuator, and it looks like without it, the max power level for this would be pretty low. I was just hoping someone would say- oh yeah, I've used one of those...
-Mike

[mixedgas]

Looks like a bare silicon detector to me....based on the bluish reflection.
dont worry, its not hard to fabricate attenuators, the hard part is the wavelength correction, and you say that has been done for you.

how far away are you from Lincoln????

Steve

[mikkojay]

Hey Steve,
Man, I was searching Google and it looks like the EXACT attenuator for this one just sold on ebay a couple weeks ago! I am about 50 miles from Lincoln, NE. I had never seen one before or given it much thought. Is it as simple as a piece of opaque material of some sort? Interesting. Any info you could share about how these work would be much appreciated!
Thanks, Mike

[mikkojay]

Here is the manual I found..

[mixedgas]

frosted ceramic, like Aluminum Oxide disks, sandblasted glass wafers, drafting mylar, neutral density filters, and usually a blue green theatrical gel for color correction, all are used. You wont need the blue green gel.

I can probably spare you a Al oxide disk if you PM me enough times to remind me, and if I have one in the Lexel spares.,,,

STeve

[mixedgas]

Do you know Jack Dunn in Lincoln, laser show guy extraordinaire???/
Univ of Nebraska platentarium???
Steve

[mikkojay]

Thanks Steve- no, I've never met Jack Dunn- I spent 6 years away from NE, so that may be part of it. I'll have to look him up on the Web- I really love planetarium shows! Once I get my projectors all squared away it might be fun to make a road trip and help light up the dome.
I am really interested in the attenuator ideas-
Thanks, Mike

[lasersbee]

For a filter that can be used for different wavelengths... a Neutral Density filter would
be the way to go...IMO
Just like the Andover LPM-1 Optical LPM uses to read higher laser powers...

Jerry