Super bright IR LED

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KamPutty
Posts: 146
Joined: Sun Jun 11, 2006 5:19 pm
Location: Santa Cruz, CA, USA

Super bright IR LED

Post by KamPutty » Mon Mar 03, 2008 12:28 pm

Hi all!

I'm in need for some super bright IR LED's. I want to use the IR at a long distance! Any thoughts gang?

I mean BRIGHT! I should be able to detect the IR from space...okay, maybe not from space, but from many feet away! long long long ways away!

~Kam (^8*
--
"Before you criticize someone, you should walk a mile in their shoes.
That way, when you criticize them, you're a mile away and you have their shoes."

denisbest
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Location: Buffalo Grove, IL

Post by denisbest » Mon Mar 03, 2008 12:36 pm

I know you can solder an array of IR LEDs and they'll give you a lot of output power. That's how you can activate that traffic light IR system used by emergency vehicles from many feet away.

riden
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Location: Illinois

Post by riden » Mon Mar 03, 2008 12:46 pm

You can pulse the LEDs at high current to get more range as long as the junction temperature remain at acceptable levels. Bruce's site has a very good discussion of the process. Here is the link to the relevant area: http://www.rentron.com/Fire-Stick-III.htm
Ralph

KamPutty
Posts: 146
Joined: Sun Jun 11, 2006 5:19 pm
Location: Santa Cruz, CA, USA

Post by KamPutty » Mon Mar 03, 2008 1:24 pm

Ya, I'm gonna hook up a bunch in parallel etc., but I was just wondering if there are some really bright ones I can also connect in parallel!

Thanks!

~Kam (^8*
--
"Before you criticize someone, you should walk a mile in their shoes.
That way, when you criticize them, you're a mile away and you have their shoes."

Philba
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Post by Philba » Mon Mar 03, 2008 1:27 pm

the other thing to consider is the viewing angle. the narrower it is, the more of the power is directed in the beam. Of course, a really narrow angle will make it harder to aim,

You might consider an IR laser if your distance needs aren't met by the available LEDs.

and by the way, using IR Array to trigger the traffic MIRTs is likely to get you in big trouble, not recommended...

KamPutty
Posts: 146
Joined: Sun Jun 11, 2006 5:19 pm
Location: Santa Cruz, CA, USA

Post by KamPutty » Mon Mar 03, 2008 1:35 pm

Ya, I need to also examine the viewing angle...actually, triggering lights is not the use for this! Just want to do some IR long distance stuff!

~Kam (^8*
--
"Before you criticize someone, you should walk a mile in their shoes.
That way, when you criticize them, you're a mile away and you have their shoes."

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