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Old 03-13-2010, 11:19 PM #1
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Default New Antistokes Material IR-Visible Converter

I have been working with an IR Raman 785nm system for about 2 1/2 years now. It was always frustrating not being able to see the beam except with a CCD camera. A few months back i started looking into this behavior and found a new material that up-converts the IR energy into visible range. Another interesting thing is takes IR and converts it to a series of Eigenvalue wavelengths, like 266, 351, 451, etc. Of course the output of each Eigenvalue drops by roughly 10 times. The photo attached is a 785nm IR laser impinging on this experimental anti-stokes device. Wearing safety glasses you can see the scatter at 451nm( royal blue), because the glasses only have about 0.1 OD at this frequency. I tested from 785 to 930nm and i believe this material to be a broadband converter maybe beyond 1064 and might go to 1500 range like the Erbium lasers. I sent 2 to Mr. Hug to test.
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Old 03-14-2010, 01:27 AM #2
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Default Re: New Antistokes Material IR-Visible Converter

I've been using an IR indicator card for the past 15 years...
Mine came from Radio Shack at the time....
I still use it today....

infrared indicator indicatorcard IR laserdiodes IR-viewer optics conversion upconversion IR-Cards ir viewer infrared converter card infrared phosphor card

BTW.... I have no clue as to who Mr. Hug is that you refer to...


[EDIT]
This is the 3rd same thread about you selling a product on the
Forum... That is called SPAMMING...
You have 7 Posts and 3 similar Threads pushing your stuff...

One Thread would have sufficed...


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Last edited by lasersbee; 03-14-2010 at 02:38 PM.
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Old 03-14-2010, 04:08 AM #3
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Default Re: New Antistokes Material IR-Visible Converter

Mr Hug, is MFO....and this is a new class of material science..not 15-20yr old stuff
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Old 03-14-2010, 04:15 AM #4
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Default Re: New Antistokes Material IR-Visible Converter

This is how state of art it is, trying to find a CZ reactor to grow crystals of this material.similar compounds are superconductors at LN2 temperatures. Nobody has any crystals grown of this material...real time right now, i'm trying to find a shop who does CZ growth on small scale to try to grow a rod of this at 1600-1850 deg C. The result is a superconductive laser matrix with high thruput and efficiency...Handheld powerful Laser weapons, etc
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Old 03-14-2010, 04:17 AM #5
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Default Re: New Antistokes Material IR-Visible Converter

Quote:
Originally Posted by archeometry View Post
Mr Hug, is MFO....and this is a new class of material science..not 15-20yr old stuff
You haven't addressed the Multiple Thread Spamming...

At $75.00 for something I can do for under $13.00 the "new
class of material science" is too expensive for the Forum
community... IMO

The "15 year old stuff" still works after 15 years and is STILL
available at a descent price....

[EDIT]
BTW... Double Posting is bad Forum Etiquette it is really easy to use the
EDIT button to add to your Post...


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Last edited by lasersbee; 03-14-2010 at 04:19 AM.
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Old 03-14-2010, 04:27 AM #6
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Default Re: New Antistokes Material IR-Visible Converter

Also the Radio Shack stuff is phosphors used in color TV's..Zinc Sulfide, etc. And that material used in detector assemblies in Nuclear, etc for alpha, beta scintillation , Spinthariscopes....lo mismo....basically old tech...archeometry
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Old 03-14-2010, 04:33 AM #7
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Default Re: New Antistokes Material IR-Visible Converter

laserbee, do you wear safety glasses at rated blocking laser frequency and see results with radio shack device, or are you bare eyed?..answer this, because you know IR does retinal damage...post some pics of the Radio Shack card viewed through IR blocking goggles from your CCD camera...ok archeometry
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Old 03-14-2010, 04:39 AM #8
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Default Re: New Antistokes Material IR-Visible Converter

You're trying to tell me that your wheel is rounder than the wheel
I foundl...
But my wheel is a lot cheaper than yours...

As you can imagine I am not in the Shop at this hour..."
I'll gladly respond to your "technical" queries tomorrow with the
PROOF that you NEED to put your questions to rest...

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Old 03-14-2010, 06:48 AM #9
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Default Re: New Antistokes Material IR-Visible Converter

Quote:
Originally Posted by archeometry View Post
This is how state of art it is, trying to find a CZ reactor to grow crystals of this material.similar compounds are superconductors at LN2 temperatures. Nobody has any crystals grown of this material...real time right now, i'm trying to find a shop who does CZ growth on small scale to try to grow a rod of this at 1600-1850 deg C. The result is a superconductive laser matrix with high thruput and efficiency...Handheld powerful Laser weapons, etc
You're going to Czochralski pull, from the melt, single crystals of "a complex aragonite mineral interdispersed with manganese and other elements" (your words, from your other thread)?

I guess you have a phase diagram of some kind, or some kinetics calculations, or at least some minimal kind of evidence that this is anywhere near possible?
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Old 03-14-2010, 07:08 PM #10
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Default Re: New Antistokes Material IR-Visible Converter

Quote:
Originally Posted by archeometry View Post
laserbee, do you wear safety glasses at rated blocking laser frequency and see results with radio shack device, or are you bare eyed?..answer this, because you know IR does retinal damage...post some pics of the Radio Shack card viewed through IR blocking goggles from your CCD camera...ok archeometry
To answer your question...

I always wear appropriate Safety Goggles when using Lasers in the Shop.
I would be an Idiot to even think of using Lasers in the Watt range
without Proper Laser Safety Goggles...

I performed a few test this morning (all the while wearing my IR Laser
Safety Goggles) and found that my 6 mega pixel Sony Cybershot camera
doesn't do justice to the bright Orange beam profile reflected off my
"ancient" IR Indicator Card as seen directly through the IR Googles.
The Beam profile is a much brighter Orange seen directly through the
IR Goggles.

It is probably the IR that is drowning out the actual Orange color of
the Beam profile on the IR Indicator Card seen by the camera...

Yes I know... the IR Card is in a reflective Clear Plastic Case (it has
been in that case for years to protect it from being touched by grimy
little fingers). It works just fine though the plastic case.
I was alone in the shop and wearing my Laser Safety Goggles at all time
during the tests... (I think I mentioned that....)

This Pic shows the IR Beam profile as seen directly by the Camera...


This Pic shows the same IR Beam profile with IR Goggles between the IR
Indicator Card and the Camera.. (yes... I have more than 1 pair of IR Goggles)
The actual image seen through Goggles with your eyes is much
brighter and Orange...


I then set up a simple reflective test... I tried it with the IR Indicator
Card in and out of the Plastic Case and basically the same amount of IR was
reflected.. don't forget that the IR beam is diverging slightly and the active
area of the LaserBee I is 8mm X 8mm.

this Pic shows the reflected reading on the LaserBee I....



and this Pic shows the actual Testing power of the IR Laser Beam going straight
to our NewPort Thermopile Sensor... with only the IR Indicator Card removed
from the path of the beam... notice the LaserBee I still shows the Max reading
on the LCD Display..



Yes... the tests were done at 1 Watt of IR... and our IR indicator card had
no damage to it and can even detect the beam of a low powered IR LED...
like in a TV remote..

I still stand by what I posted....
Your $75.00 IR indicator may be newer technology... but I can do the same
thing for under $13.00.... I'll stick with what works for us..


Jerry
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Last edited by lasersbee; 03-14-2010 at 07:34 PM. Reason: Spelling errors
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Old 03-16-2010, 12:52 AM #11
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Default Re: New Antistokes Material IR-Visible Converter

What i'm wondering: IS this material actually something new, or is it just the same as the upconverters that have been on the market for decades?

And if it is, how does it compare to the existing stuff in terms of (quantum) efficiency?

As far as i know, these things have very low conversion efficiencies, needing 100 to 1000 IR photons to produce a single visible one. At 1 watt of power thats not much of a problem, but at lower ir powers it makes them tricky to use, especially in lit conditions.
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Old 03-17-2010, 06:56 PM #12
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Default Re: New Antistokes Material IR-Visible Converter

I'd be very interested in an IR card/detector, but you'd have to beat the regular prices (roithner lasertechnik has the cheapest I've found so far) or provide some new advantages. I've used a few different IR cards at the university, the ones requiring charging are sensitive but irritating in use, others are less sensitive but much better in use.
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Old 03-17-2010, 07:25 PM #13
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Default Re: New Antistokes Material IR-Visible Converter

Quote:
Originally Posted by Bluefan View Post
I'd be very interested in an IR card/detector, but you'd have to beat the regular prices (roithner lasertechnik has the cheapest I've found so far) or provide some new advantages. I've used a few different IR cards at the university, the ones requiring charging are sensitive but irritating in use, others are less sensitive but much better in use.
How about a link and/or prices...
I've E-Mailed a company on Germany for prices of this unit...

ALPHALAS - Lasers, Optics, Electronics - Infrared-to-Visible Converters: IR-VIS Series


@ Benm... using the IR Card I have you can easily see the beam
profile of a single IR LED running at 2omA in a lit room..


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Last edited by lasersbee; 03-17-2010 at 08:10 PM.
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Old 03-19-2010, 02:54 PM #14
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Default Re: New Antistokes Material IR-Visible Converter

I suppose its one of the charge-before-use types then, those can be reasonably bright. Downside is that the effect wears out and after a while you dont know if its the card or the IR source thats getting dimmer.

I've used some in the past, but when it comes to checking IR leds i don't bother with it and just look at them through a digicam.

The cards are still good for fiddeling with lasers though, as they tend to fry camera sensors easily
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Old 03-19-2010, 08:19 PM #15
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Default Re: New Antistokes Material IR-Visible Converter

Lasersbee:
here on page 89-90
29.90 euro for 30x50mm, 7.23 euro for 10x10mm
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Old 03-19-2010, 09:03 PM #16
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Default Re: New Antistokes Material IR-Visible Converter

Hey Bluefan...
Thanks for the price link...

They are similar to these ones we can get in the USA
for under $13.00... might be less expensive if you factor in
the Shipping costs..

IR INDICATOR CARD-


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