New toy

[Hemlock_Mike]

I got my "new" power meter from fleabay !!!  It's and old Scientech 362 with sensing head.  Range from 0.001 watts to 10 watts. It looks new  
I called Scientech to ask for a user manuel and expected crap --  Instead, they emailed me the entire book with schematics and the book for the sensor --- NO $$$.  Gotta love a company like that.

Mike
Sorry -- I've shrunk this picture to 2x3" and 7 Kbits.
OK- I got it to 4x6.....

 

[SenKat]

VERY NICE !!! Does it workie ? ;D

 

[Hemlock_Mike]

OMG -- It's like new.  If I touch the sensor with one finger for one second, I transfer 50 mW into the calorimeter and the meter goes south!   It settles back in about 5 seconds.  It will also read pulsed output in joules total.  I've got a bid on a chart recorder to connect too !!

Mike

 

[SenKat]

EXCELLENT ! What did it set you back ?

 

[Hemlock_Mike]

We haggled -- $178 with free shipping !!
Damn -- The sensor - Like New - is worth that.
Mike

 

[Aseras]

I hate you....

 

[Da_Dude]

 

[laserrod]

Mike,
I'm happy your luck changed. Knock on wood.

I know 2 of your CO2 tubes cracked. Man that's a bummer. I felt bad for you.

What kind of sensor technology is it. TEC? Thermocouple? Photoresistor?
Can you post that schematic?

I'm use a radiometer (glass vacuum bulb with b/s plates that spin around on a needle)
and a stopwatch. Flintstone technology!

 

[Daedal]

... :-?

What's with the dig-up? :

--DDL

 

[laserrod]

It's fun to put objects in motion with photon impact!
Dust particles don't seem to move in a 40mW beam.

My sister buys me the best Bday gifts! I think it cost $40 out of Red Box.

DDL,
Funny, when I saw dig, I first thought of digital. I dig not for fossil..

 

[Benm]

Mike,
I'm use a radiometer (glass vacuum bulb with b/s plates that spin around on a needle)
and a stopwatch. Flintstone technology!

Just wondering.. is there some sort of predictable relationship between rpm and laser power with those?

 

[a_pyro_is]

Yes, but you have to take several known lasers to make yourself a chart.

 

[laserrod]

Bemn,
That is a good question and there must be easy answer to figure it out with some formula.
Anyway it tells me true relative power. No nonsense with wavelenth I think.
The glass reflects some power but my lasers are not polarized so if I rotate beam axis reflection loss does not change.
When I get more lasers I'll try to formulize it.
Bearing friction VS rpm should be the only problem in the formula?

heres a quick test I did.
1W 808 rev/sec 23/10 this LD fast axis is terible. lots of power lost, didn't hit target.
40mW 532 rev/sec 3/10

 

[Zarniwoop]

Sorry to continue keeping this thread off-track, but...
With my radiometer it seems to make a difference where on the vanes I focus the dot (i.e. how far from center) and how large a beam diameter.
(Or I can go really tight and burn the black coating ).