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During th r&d on the passive sonar HBH#2 enclosure, a color camera and a single led lighting unit was produced using a high brightness led flashlight (9 lights) and was installed within this simple enclosure. This should work down to the 500' I was reaching for, but actual sub mounted results would really have been nice to share. I supplied this with the provided power pack and batteries with fair results. This was not too pricy either. David Bartsch From: ShellyDalg@aol.com Date: Fri, 9 Jan 2009 00:13:29 -0500 Subject: Re: [PSUBS-MAILIST] LED Lighting Options To: personal_submersibles@psubs.org Ya, with a big flashlight in the cabin, I'm sure reflections will be a problem, not to mention the heat.
On building a dive light....... If you have say 6 or 12 of the LED's in a mirrored tube with a parabolic reflector in the back, and a lens set-up like the Maglites have, seems like you could focus the beam.
If the LED's are arranged along the perimeter, and the spacing is correct, it should be possible to get the curve on the reflector to focus the individual lights into one larger beam, then use the lens on the front to focus it further. I think I've got some old lenses around here somewhere.....might be a fun thing to play with.
Maybe the back reflector would need to be a segmented dome shape made of pie-shaped triangles, with each triangle angled so it directs the LED that's closest. Each triangle/pie-shaped segment would need to have a parabolic curve to capture and focus as much light as possible from it's corresponding LED.
I have a glass "diamond" about 3 inches in diameter. I think I'll try putting some small seed lights on it and see what happens.
Anyway, a housing would be a snap to make, and I like Brent's idea of using 18 volt tool batteries. They charge quickly and can be replaced easily. ( Although they are a little expensive to buy )
If I find anything useful I'll pass it along. Frank D.
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