IR Lasing Gold

[homefire]

Why do you think you have to use LASER?

I have to old style Single Heterojunction GaAs LD-60's made by LASER DIODE here.

They pump out 905nm at a Watt or Two if set up right.

Lazer would only work if you Scanned with it, and got a reflection you think was usable.

These diodes are from the 90's and little info available on them.

These are Stud type Diodes and can HURT you!

25 Watt Peak Power out Put.

3 volts and up to 3o amps modulated Drive current.

[Seden]

Tuning the Laser

Yes that is a problem but hey, if the 808nm laser just happens to work for the particular thickness and makeup of the placer gold that would be great (luck of the draw). If not it was a fun experiment and at this point I don't have the funds to buy a tunable laser so I've got another laser idea that's more likely to work.

Once I get the circuit built and tested the theory, I will post the schematic for others to try assuming of course it works! But at this point will keep the idea to myself till then.

With the economy the way it is,one must choose carefully the things to experiment on! So far with the cost of the IR lowpass filter + Laser I think I'm at $60.

J_P, remember the post about Dr. Paul Dobler whereby he found the radiation of gold to be at 1.2mm or 249GHZ? On nanotechweb there was an article about how they discovered that gold ABSORBS radiation in and around that frequency range. To me I don't care if it radiates or absorbs as long as there is a measurable anomaly,but interesting huh? See here:

http://nanotechweb.org/cws/article/tech/35464

In particular this:Andreas Thoman and colleagues at the University of Freiburg have shown that nanostructured gold can almost entirely suppress reflections at the substrate-to-air interface over frequencies ranging from 200 GHz to 2.2 THz in the far infrared. Would this work out in the field, good question,but good to note.

Randy

[Seden]

Homefire

We were both typing at the same time,but if I can get by without a laser that would be MUCH cheaper and thanks, I will try your ideas.

Randy

[homefire]

Ha! I have a $12.00 philips web cam that is hot on IR.

I'm going to mess with it when it gets dark tonight.

I have some panned gold and want to see what it does.

I'm going to use my TV remote as a IR source.

[homefire]

IR TEST

I checked out the IR remote control. Ceepo Camera see's the IR but does not Reflect off the 14K ring.

Remote I think runs in the 700u wave area?

[Seden]

Differentiated IR Photography

Homefire,

Very good on having some panned gold around, so you are a gold prospector as I am. I don't know if you get the California Mining Journal but
there was an excellent article called "Succeeding with Infrared Photography" by Eugene J. Erdos (of Infrared Photogeological Services) in the April 1990 California Mining Journal that's a darn good read. In it the author quotes from Kodak's "Applied Infrared Photography",M28,P.3 1981 where it says "infrared luminescence is caused by illuminating the object with relatively long wave-length radiation(visible blue or green) which the object re-emits at longer wavelengths (infrared radiation). Talks about "Differentiated infrared photography" and "This type of differentiated IR photography will show the orebody under the overburden, and will omit surface features totally, showing only the infrared ore zone as if it were bare". The closing paragraph of the article says that infrared only photography produces a red and black picture, infrared and non-infrared. Says this is between 700-900nm. "Within these wavelengths, the evidence suggests that one particular band is most responsible for the infrared radiation emanating form ore deposits".

Blue-Green light is easy to come by so will give this a try.

Randy

[homefire]

I go panning.

Nugget shooting.

Just messing around.

IR is cool to see land features you just don't see with your eyes!

You can see paths that just don't seem to be there.

You can see Depressions that don't seem to be there!

I think with a good Thermal Camera you could see heat variants just below the surface that could help you out.

I had a Cheap Russian IR scope that was fun to play with. Some one Snatched it!

With a old head lamp just glowing orange/red you could see every thing.

I do think Gold would reflect the IR better then any back ground materials and produce a Glow! The Remote control just does not have enough Cajonies!

[J_Player]

Lazer would only work if you Scanned with it, and got a reflection you think was usable.

The article Seden referenced does not have anything to do with the reflective properties of gold. The IR laser light is not reflected from nano-particles of gold. The nano-particles are stimulated by the IR laser light, and there is a resultant emission of visible light, due to the stimulus of the photons. No reflected IR is mentioned in the discoveries in that article. Thus, we are not looking for reflected IR light. We are looking for gold nano-particles glowing visibly when they are pulsed with an IR laser of the correct freauency for the thickness of gold nano-particles.

The other idea about using an IR imaging method to look at parts of the ground that are glowing with IR without a laser is approached differently. You don't need a laser, only an IR imaging method. The least expensive and highest quality method I have seen is to convert an old digital camera to an IR camera. This costs nothing except the price of an old IR camera. 1MP camera will do fine. You can get these used for under $30. Then remove the IR filter from the image sensor and replace it with a piece of exposed 35mm color negative film. You now have an IR camera that allows you to see an image wherever it is pointed. But it is showing IR, not visible light. Pretty nice for about $30, eh?

Best wishes,
J_P

[WM6]

replace it with a piece of exposed 35mm color negative film.

J_P

35mm color negative film exposed on what?

On sunlight?

On coulored light? On which spectrum of light?

thanks

[J_Player]

35mm color negative film exposed on what?

On sunlight?

On coulored light? On which spectrum of light?

thanks

The piece of film is not actually exposed. It is from the end of a roll of exposed film. You are looking for a piece of film from the end of a roll of developed film -- the end where it is opaque because no photo was taken on the end of the roll. This will act as a visible light filter. See this article for details on how to convert a digital camera into an IR digital camera: http://geektechnique.org/index.php?id=254

Best wishes,
J_P

[Max]

arm chairs and other bs

Just as you predicted this thread started going south with the usual crowd. Esteban thank you for sharing that information as you are one of the very few on Geotech that actually designs and builds things where others in their arm chairs just tap away on the keyboard with sarcastic comments.

Gentlemen,what do you think about the article I posted at the start of this thread from Nanotech.org? Did you READ it? Yes,no maybe,gonna do it?

Nice part about it is it's pure science. I really want your input that's why I posted it.

Randy

Hi Randy,
sarcastic comments are due to the lack of proofs or facts about LRL-pretenders... no real project, no real schematic (or do you count the stamp-sized ones as good?), no real design, nothing of nothing apart words, claims and pictures of paint rollers and the like... so, better stay on the arm chairs than buy that stuff for the pleasure of discovering that they don't work a c.r.a.p.

About the article... hmmmm.... gold films , means you need particular kind of particles e.g. particles size , thickness I think... so proves nothing... frequency of gold ? But sure quantum physics explained how atoms could go in excited states and then return back to equilibrium releasing e.g. light photons... nothing new I say.

But now follow my thought: think at chromium element... ok... all we have chromium stuff... some more than others (like a big Harley-Davidson bike parked near home...) but what you see ??? red flashes ???

I mean... to make something quantum-physics you need a particular setup... like trapping as doping agent some chromium atoms in a synt ruby matrix of Al2O3... that's why THIS same chromium atoms give the flashes and the bike not!

Of course, you need mirrors, brewster windows, xenon-hi-speed-lamps, infinite-index-reflectors etc etc etc but concept is that if your chromium is on the harley it will not shine red!

Or not ?

So... what we are talking about here ? Gold films ? And where are gold-films in the soil near an old time buried target ? That's the point... it's a meaningless reference to our topic of remote sensing I think...
also cause I dubt people of South America, proud owners of (claimed by them) working LRLs have really a femtosecond-pulsed-laser module on their wood-boxes... but maybe some PVC pipe filled with air and farts...

About the IR pictures.... well... if it will be so easy I think LRL-people had already made some IR-camera or modified something, bought some airport surplus stuff... e.g. the kind that by IR measure body temperature etc but I see nothing about... I think the thermal way is full of c.r.a.p. too cause there were big claims about but no facts, no proofs, no reliable explaination and , of course, weren't any attepts of partecipate to the LRL challenge...

Or not ? Maybe I miss something ?

So, will stay on my arm chair and hit the keyboard till someone of these genius will show to the world that electronic LRL is reality!

Kind regards,
Max

[Max]

Randy, thanks. Is more easy create sarcastic comments.

Is far more easy filling a PVC tube of digested air...

[Max]

"High purity gold reflects infrared (heat) energy almost completely, making it ideal for heat and radiation reflection. "

http://gold.yabz.com/facts.htm

In the same way, gold emits is own IR. So, to use IR for detect gold at distance is not a mistery... Maybe is better IR laser.

Thin layers and colloidal dispersions ... but maybe for you gold is gold... and so chromium is chromium and harley-davidson bikes shine red flashes just for you!

[Max]

Yes that is a problem but hey, if the 808nm laser just happens to work for the particular thickness and makeup of the placer gold that would be great (luck of the draw). If not it was a fun experiment and at this point I don't have the funds to buy a tunable laser so I've got another laser idea that's more likely to work.

Once I get the circuit built and tested the theory, I will post the schematic for others to try assuming of course it works! But at this point will keep the idea to myself till then.

With the economy the way it is,one must choose carefully the things to experiment on! So far with the cost of the IR lowpass filter + Laser I think I'm at $60.

J_P, remember the post about Dr. Paul Dobler whereby he found the radiation of gold to be at 1.2mm or 249GHZ? On nanotechweb there was an article about how they discovered that gold ABSORBS radiation in and around that frequency range. To me I don't care if it radiates or absorbs as long as there is a measurable anomaly,but interesting huh? See here:

http://nanotechweb.org/cws/article/tech/35464

In particular this:Andreas Thoman and colleagues at the University of Freiburg have shown that nanostructured gold can almost entirely suppress reflections at the substrate-to-air interface over frequencies ranging from 200 GHz to 2.2 THz in the far infrared. Would this work out in the field, good question,but good to note.

Randy

yes, GOLD NANOSTRUCTURES! ... what we haven't in real soil... real soil is a mess of stuff of a number of different elements... for me is J.A.A.F.P. just-another-already-failed project...

But will be nice if will find me wrong on that... maybe I'm wrong...

Kind regards,
Max

[Jim]

The book is entitled "Discovering Treasure Auras in the Digital Age by David Villanueva" which will set you back $19 to download,but a good read and interesting.

Randy

Randy...as I stated on that other website, I also own that book. In my opinion, it is worthless for the purpose of treasure hunting.

The book offers no validation from the scientific community, and its writing style is very amateurish.

Akin to something written by Dell Winders, the author boasts and brags about other successful means of treasure hunting. Such as dowsing, using Long Range Locators and Polaroid film. He also touches on seeing lights in the sky to find gold.

Two thumbs down for the realist or rational observer, but great for those sucked into conspiracy theories for finding big treasures.