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Originally Posted by WM6
Hi Nelson
1. You can use any normal red laser pointer (better one with stronger laser beam). Even better green laser pointer. All are covered by your photo transistor.
2. Spider question. I think you can use lenses with different optic measure, bacause of separate tunnig both sensor.
3. There was some interest at PM here, but I dont know in which phase are their projects now.
Wish you DIY succes and have a great time with your GOLDY.
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Hi WM6,
After problems with focusing contact lenses that I treated with warm CH3CHOHCH2OH solution, I read your explanation of gold color frequencies. I also read online how gold reflects another color we cannot see much better than the red and orange colors. Gold is an excellent reflector of Infrared light. Fortunately, we can find some very strong infrared lasers, and also infrared sensors. So I am changing the laser and phototransistors for infrared.
But I find also the lenses no longer have the same focus when changing to infrared. IR light requires the focal length be changed by a small amount depending on what infrared frequency is used. It is with great surprise I see the warm CH3CHOHCH2OH lens treatment resulted in perfect focus of the IR reflection. I will take additional measures to insure I maintain the correct power supply polarity and PN junction arrangement for northern latitude usage.
Best wishes,
J_P