Esteban was right!

[humhum]

Originally Posted by Geo

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]

Originally Posted by WM6

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

Thanks

[Geo]

Originally Posted by humhum

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]

Originally Posted by Geo

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]

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