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Old 10-20-2009, 05:09 AM #1
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Default WTH: Radiometer (Crooke's)



Anybody know where to get one of these?


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Old 10-20-2009, 05:14 AM #2
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Default Re: WTH: Radiometer (Crooke's)

Heres one from ThinkGeek.com for $12.99

ThinkGeek :: The Classic Radiometer
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Old 10-20-2009, 05:39 AM #3
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Default Re: WTH: Radiometer (Crooke's)

american science & surplus $10.95

American Science & Surplus : Search Results for "radiometer"
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Old 10-20-2009, 06:14 AM #4
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Default Re: WTH: Radiometer (Crooke's)

my skool $0 jks
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Old 10-20-2009, 12:28 PM #5
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Default Re: WTH: Radiometer (Crooke's)

I know United Nuclear sells them but the price is probably terrible like everything else on that site.
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Old 10-20-2009, 12:34 PM #6
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Default Re: WTH: Radiometer (Crooke's)

I'm guessing your gonna point your laser at it and see how fast you can get it to spin... make a nice video.. and make sure you strap it down, don't want it flying away
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632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

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473nm - 2x CNI lab lasers ~40mW
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405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

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Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
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Scopeguy20 Blublockers for 405nm lasers!

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Old 10-20-2009, 01:14 PM #7
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Default Re: WTH: Radiometer (Crooke's)

Hey i use the one from think geek with my rpl..... make sure you expand the dot don't want to burn off the coatings : )
35W HID also works well : )
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Old 10-20-2009, 01:22 PM #8
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Default Re: WTH: Radiometer (Crooke's)

be carefull i got a flash in my eye it reflects everywhere lol
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Old 10-20-2009, 01:42 PM #9
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Default Re: WTH: Radiometer (Crooke's)

Methinks EDMUND SCIENTIFIC may carry them ?
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Old 10-20-2009, 01:48 PM #10
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Default Re: WTH: Radiometer (Crooke's)

Here's an Idea...

1) Take a Radiometer and a Non contact digital RPM Meter...
2) shine a Laser beam on the Radiometer's Vanes
3) use the Non contact digital RPM Meter to take a reading of the RPM.
4) use that speed to calculate the Laser's power in mW.....

There you go... another DIY Laser Power Meter project...

BTW... eBay has Radiometers as well...


Jerry
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Old 10-21-2009, 01:47 AM #11
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Default Re: WTH: Radiometer (Crooke's)

i have one from ebay and its really fun as long as you use goggles because the laser flashes everywhere.
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Old 10-21-2009, 02:41 AM #12
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Default Re: WTH: Radiometer (Crooke's)

Quote:
Here's an Idea...

1) Take a Radiometer and a Non contact digital RPM Meter...
2) shine a Laser beam on the Radiometer's Vanes
3) use the Non contact digital RPM Meter to take a reading of the RPM.
4) use that speed to calculate the Laser's power in mW.....

There you go... another DIY Laser Power Meter project...

BTW... eBay has Radiometers as well...


Jerry
Hey great idea.. dont know about accuracy, but its a good way to measure the power of lasers of any wavelength. Power rang would be quite low.. maybe around 5-150mw, and a guess at accuracy would be around 20-30%, alot of variables must be taken into account.
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Lasers!
10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
685nm - Being built!
660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

* indicates a review has been done, on this item.

Check out my How to Build a Selectable Dummy Load Thread!
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Old 10-21-2009, 04:09 AM #13
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Default Re: WTH: Radiometer (Crooke's)

I never said it would be as accurate as a LaserBee I or Kenometer....
But it should let you know which laser has a higher output..

Jerry
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Old 10-21-2009, 05:13 AM #14
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Default Re: WTH: Radiometer (Crooke's)

Quote:
I never said it would be as accurate as a LaserBee I or Kenometer....
But it should let you know which laser has a higher output..

Jerry
True I guess all you need is a LPM tested laser to compare to.. then you can take your readings off that. that would also help increase accuracy, since the only unknown is the power of the second laser, the rest of the apparatus has not changed (except for maybe ambient light... eg sun going behind cloud).

Good idea tho!
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Lasers!
10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
685nm - Being built!
660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

* indicates a review has been done, on this item.

Check out my How to Build a Selectable Dummy Load Thread!
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