Which of these IR (Infrared) leds would be brightest?
I am making a set of night vision goggles, because I found out my LG chocolate 8500 phone picks up infrared on its camera. I have found several IR leds, but I have no experience with this so I wanted to get some advice. These are some of the ones I've found, if you have any other suggestions feel free to post.
"Triple Chip" led
http://cgi.ebay.com/20x-10mm-Triple-Chip-200mW-Infrared-IR-LED-Night-Vision_W0QQitemZ250210584816QQihZ015QQcategoryZ66954QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262
OP290A Crazy Powerful led (4v 1.5a!)
http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=10165
Generic 850nm 5mm 100mw led
http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=11093
I know that with the power going to one Optek ir led (4v*1.5a=6w) I could power 60 of the 100mw ones, but what would the difference in brightness be? Also, how greatly will the beam angle affect brightness (My main goal is to see far, but I don't just want a tiny spot of light. Is 50 or 20 degrees better for indoor use?). I guess i have a lot of questions, any help would be greatly appreciated.
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Tags: amp, beam angle, ebay, ir leds, lg chocolate, main goal, night vision goggles, optek, tiny spot, triple chip
August 30th, 2010 at 11:13 am
Basically, the higher the wattage, the brighter the LED. In the case of those listed, it looks like the middle one is the highest rated. Of course, it also depends on how much of that power winds up in the wavelength your camera is sensitive to. My advice would be to buy one of each that you are considering and then see what you think.
As far as illumination angle, I’d just use some optics to focus the beam once created.