Recent content by archeometry

here is a couple US Army photos of retinal burns, etc from ND-Yag Laser rangefinder

I got the info couple years back from Kigre Laser in N.C., Los Alamos developed the LIBS unit for the rover mission on Mars...during a test, some visiting scientists were viewing this pulsed Nd-Yag Libs unit, not everyone in this room had safety glasses. The guy from Kigre said the pulse...

Here is the prototype ceramic material, should go to 1600-2000 deg F and would be mounted on a refractory spatula of alumina or equivalent material.

From the photo based on intensity of the dots 10-20% reflection...take piece of sandpaper and sand off the plastic coating...and see what happens..

The device was designed for 785nm for high power density 5Kw/cm2 or better and Raman laser systems. Also there is a plastic coating over the matrix that can be removed and because you see reflection at 473nm doesn't mean reflection in the IR. Hence mirrors made out of polished silicon for IR and...

I made the device for 785nm and found that it goes to 980 and possibly to 1064nm. The Raman laser i made this for has a head with a virtual focus point 7mm in front and pinches the beam to 100micron dia. This at 300mw output 100 micron beam will burn wood...and doesn't burn the anti-stokes...

Those wimpy laser converter cards are cheapo and low temperature narrowband and not designed for POWER DENSITY. This gizmo uses another class of material and will withstand W/cm2 and has wide broadband range..I use a dangerous level IR Raman system that will burn carbon material, etc.and your...

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...

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

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...

Mr Hug, is MFO....and this is a new class of material science..not 15-20yr old stuff

what range of frequency in IR and do you wear safety glasses while viewing beam? this converter gives a good response while wearing glasses...send the pics, response profile, etc...is the device safe or are you bare eyed while viewing?..archeometry...live in Mississippi and have a high tech lab...

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...

Yeah, sorry about the post in wrong category, first time i was on this forum and not familiar with it..ok...archeometry

Here is a pic of safety glasses and the IR-VIS converter wand above them, this is State of Art R&D, here in a Nano-Lab In Mississippi...DW