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Old 03-21-2010, 09:55 AM #1
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Default light show optics

light show optics
================================================== ================
Okay this is an optical question about how to make a light show using leds to go with my scanner.
i do not want to crowd scan with laser but i think there is nothing about using leds and some simple mirrors could give a similar beam effect.
i have found a lens to focus a led down to a 6mm point.
http://www.luxeonstar.com/polymer-op...leds-p-424.php
My problem is i need a second lens to stop that light from diverging so fast.
My goal is to get a 1in beam from 144in
but my max is a 3in beam from 144in.

http://cgi.ebay.com/2-PCs-3W-PROLIGH...item563a394e71
This led seems perfect go along my scanner.
This idea i think would get me the best results.
can i put a relay right before the laser diode and use it to turn on the led and also add a cap in the separate led circuit to slow down the rate a bit as the rate of the lasers i expect are above the rate of the leds.
i just don't want to put one in there and have it destabilize the circuit or produce unwanted spikes and if not right before might someone suggest a better placement of one?
i want to use the modulation of the laser to control the led i do not care if the led only has TTL modulation just as that it works with the laser.
please correct me if any of this is wrong, i would hate to break or have made some stupid mistake and waste money.


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I have a projector small only 2.5W
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Last edited by kiyoukan; 03-22-2010 at 05:31 PM.
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Old 03-21-2010, 03:43 PM #2
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Default Re: light show optics

A larger lens placed further from the LED will have a larger initial beam, but MAY have a smaller beam at a distance. 1" is damn impressive, and I think you're lucky to have gotten that far.
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Old 03-22-2010, 03:36 AM #3
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Default Re: light show optics

Updated first post
__________________
I have lots of lasers.
No point to list.
I have a projector small only 2.5W
I have other toys. What its plain and simple.

Last edited by kiyoukan; 03-22-2010 at 05:11 PM. Reason: not needed
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