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FrozenGate by Avery

Post your random pics!

I was recently in Sendai Japan for work.


A cute diagram outlining how a UPS protects server racks

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Toy shop with a strange name

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whaaaat is this all about? I asked google, and it seems (according to their models) the clothing line is aimed at Japanese women looking to emulate the "black" lifestyle. Taglines include "Turn up!" "keep it posi" and of course "Today was so YOLO"

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Pseudoscience and superstition permeates all cultures to some extent

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The swastika was originally a symbol of prosperity used by Buddhists and Hindus before the Nazis hijacked it. Google maps has swastika icons regularly throughout the country, and they indicate Buddhist temple locations.

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Something more pertinent? The University I was working at does some bleeding edge research. Superconducting magnets, material/microcrystaline structural design, nuclear, semiconductors to name a few. This is a neutron beam monochromator. Wikipedia tells me it operates with diffraction somehow. This is spooky witchcraft territory for me.

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One of the first blue LEDs to exist:

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Oh, and they grow experimental LASER CRYSTALS. How cool is that? I recognize LBO and YAG. This is of course the raw crystal before it is cut to size and shape.

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Interesting pics, Cyp, thanks for sharing. :yh:
Didn't the Nazis use the swastika symbol with the arms pointing in the opposite direction? Unfortunately, most people associate the Swastika with the damn nazis, no matter which direction the arms are pointing.
 
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I know, the symbol is also much older than their use, they hi-jacked it. I received an email back from LaserProbe, I'm being told they cannot provide the numbers regarding laser power into the thermopile vs millivolts out, but that at 150 watts in, that's 60 mv out of the BNC connector... as a rough number which of course varies, depending upon the wavelength.
 
Those high power heads are often calibrated using 1064nm. Not a lot else putting out that kind of power.
 
You don't see a lot doing 150 watts. That would take a whole lot of diodes to get that kind of power.
 
Thanks :)

Where are you Jerry :)
Sorry Chris... Just logged on...
Been busy doing after winter maintenance spraying
weeds and cutting the grass (~1 acre).

Not having the head in hand... I look at the data
sheet link you supplied and it looks like there is a
pre-amplifier in is own box between the head and
the same name meter. that says to me that the
BNC output is directly from the thermopile.

From that I would put a known value of power on
the head and take a voltage reading on the BNC
connector. That should give you the V/Watt factor.

As to the calibration with the red and black jacks..
that would be in the User's Manual of the original
LPM or Head...like in the User's Manual of the Scientech
thermopiles.

Sorry I can't be of more help... Have never seen one
of those heads.:undecided:


Jerry
 
Welcome back, Jerry. Glad to see you are staying busy, though it gets difficult to find your posts sometimes. Just yanking on your chain, buddy. :yh:
 
Thanks Jerry, time to use a screw driver and see why the current does’n’t increase much when inputting over 3 volts and up. Yes, I don’t have the preamp for it. I wonder though, is it common that the output voltage is highly non-linear vs power in with the TEC’s used in these things?
 
Welcome back, Jerry. Glad to see you are staying busy, though it gets difficult to find your posts sometimes. Just yanking on your chain, buddy.
Yeah... I know what you mean...
I only have a few posts on the forum. :whistle:
:crackup:

Thanks Jerry, time to use a screw driver and see why the current does’n’t increase much when inputting over 3 volts and up. Yes, I don’t have the preamp for it. I wonder though, is it common that the output voltage is highly non-linear vs power in with the TEC’s used in these things?

If you are referring to Laser Power In...
No it is not if the Sensor coating is pristine and
there is no other electronics between the Sensor
and the BNC connector.

The red/blk connector Calibration Voltage In is
another story...

I'd open the head and see what's inside. Is your
head fan cooled ?? I couldn't see the side of it.

Post the pics of what is in there.


Jerry
 
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Sorry Chris... Just logged on...
I only have a few posts on the forum.
Jerry

Welcome Jerry.
I see you've included your location in your Bio, +rep when I can.
Please make an intro post in the Welcome section and tell us a bit about yourself.
Do you have safety goggles? Eagle Pair are good.
Use the Search Bar to find information you're looking for before asking.
Then if you still don't find an answer, well, maybe it's the wrong question.
You're gonna need an LPM if you stick around for any length of time in the hobby.
Get yourself a top quality Laserbee from J.BAUER Electronics, highly recommended.
Oh and don't pay attention to the Rep System, we're trying to do a Y2K job on it.
Follow my pointers {yes, pun intended} and you'll fit in nicely.

RB
:beer:
 
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Yeah... I know what you mean...
I only have a few posts on the forum. :whistle:
:crackup:
Jerry

Welcome Jerry.
I see you've included your location in your Bio, +rep when I can.
Please make an intro post in the Welcome section and tell us a bit about yourself.
Do you have safety goggles? Eagle Pair are good.
Use the Search Bar to find information you're looking for before asking.
Then if you still don't find an answer, well, maybe it's the wrong question.
You're gonna need an LPM if you stick around for any length of time in the hobby.
Get yourself a top quality Laserbee from J.BAUER Electronics, highly recommended.
Oh and don't pay attention to the Rep System, we're trying to do a Y2K job on it.
Follow my pointers {yes, pun intended} and you'll fit in nicely.

RB
:beer:

:crackup:
 
Jerry, this thing is toast, it doesn't use a TEC, it has a small square of ceramic which looks like a special resistor deposited on top like some kind of etching, it fell off, lost it's silver solder contact with the board.
 
My cat goes nuts over the laser, too bad I don't have good motion pics

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