Esteban was right!

[WM6]

Esteban's method has nothing to do with spy cameras. He used a modulated laser in the infared spectrum to transmit. And then detcted the bouncing back lower frequency modulating frequency. Discrimination is possible, but depth is very low due to the use of the IR laser for transmission. This is why i suggested using a MASER of a slightly lower frequency for transmission and then you may get depth and discrimination.

Please understand your technologies before posting quotes of "he is wrong" as you become and sound like a fool in front of everyone.

rgds

You try first understand what I say and then comment. I know you cannot.

I am saying where primary idea was pulled out. And this was not from "spy cameras" - where did you find this (?), but laser spy microphone - a totally different things.

And yes, I can only repeat, Esteban is wrong in this case again and you do not understand either Esteban idea nor me.

Not only understand, You are not even capable of correct reading.

Scrap of hung personality make you faded.

[Geo]

Hi Geo, can you post some photos from your laser lrl.

Hi.
Here is the first version of my laser detector. Final version has some mod's... but i have not photo from it

[Seden]

Esteban was right!

Geo,

That looks really good! I'm going to try a different tact by putting the primary leads of an audio transformer in series with the power lead of my laser and connect the secondary leads to an audio amplifier and see what is heard when scanning over various metals and minerals.

I think there is much latitude experimenting with lasers where before we have been using the electromagnetic methods for close to a century now to find metals and ores.

I sure hope Esteban gets better soon. I wish I had his email address so I could write him. If anyone talks with him please tell him Randy says hi.
Thanks.

[Seden]

Scratch that idea

I connected the laser diode up with the audio transformer and first looked at the output on a scope. The usual low level mains was there but noticed that I was getting pulses when moving the laser around on my wood table,a copper coin or other metal objects. So I then hooked up an audio amplifier to the transformer and found out that the laser diode module acted like a microphone when handled and when I moved it across the copper penny it made quick narrow pulses over the raised shapes,ditto on my needle nose pliers with its tiny grooves from being polished.

I'm sure that Esteban discovered this early on and found the better method of modulating the Laser with a square wave.

[Geo]

We must understand that when we speak about LRLs we speak for "phenomenon" detectors. We must forget anything about "normal" metal detectors. Every test closer to 50cm is wrong. So, at who distance far from laser you moved the coin???
Also repeated the test having the coin on a long wood rod, not at your hands.
I am interesting for your results.

Regards

[humhum]

Hi.
Here is the first version of my laser detector. Final version has some mod's... but i have not photo from it

Geo, thanks for photo , you with this your IR Detector found anyone coin ?.




Regards.

[humhum]

IR schematic

What thinks for this two schematics with patents



Fig.1 is for Detector with FM+IR for buried metal.








Fig.2 is Detector with IR and photo diode

[Geo]

Geo, thanks for photo , you with this your IR Detector found anyone coin ?.




Regards.

Hi.
I did not find any coin. I took signals only over ancient tombs from 10m distance. It works near to 400 Mhz and has a red laser module.

[Geo]

What thinks for this two schematics with patents



Fig.1 is for Detector with FM+IR for buried metal.








Fig.2 is Detector with IR and photo diode

Can you give me the pattent number, so to read it and to say my opinion??

[WM6]

Can you give me the pattent number, so to read it and to say my opinion??

http://www.freepatentsonline.com/7288927.pdf

[humhum]

It works near to 400 Mhz .

Hi Geo, 0.40 GHz is very high Frequency, Have you tried Laser modulation with 400Hz and how is result, (Esteban said 400Hz).

Patent No for FM+IR is US5696490 A.

Regards.

[Geo]

http://www.freepatentsonline.com/7288927.pdf

Thanks

[Geo]

Hi Geo, 0.40 GHz is very high Frequency, Have you tried Laser modulation with 400Hz and how is result, (Esteban said 400Hz).

Patent No for FM+IR is US5696490 A.

Regards.

No, i did not try to modulate the laser with 400 Hz

Regards

[humhum]

No, i did not try to modulate the laser with 400 Hz

Regards

Ok, without modulation.
How is result with your last new IR detector.


Best Regards.

[goldfinder]

IR is heat - not an LRL detector

Anyone can buy an off the shelf laser pointer heat thermometer. This is not anything you can use for mineral detection. There are literally an infinitude of different heat responses in nature. I know, I have worked on IR sensors extensively. Take for example FLIR - forward looking infrared (FLIR). Very sophisticated use of IR by the military. It has some neat use but THing is not one of them.
Goldfinder