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Old 04-11-2010, 04:48 AM #1
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Default flashlight led lens and reflector

so im looking to make a flashlight with really great throw but have no clue what i need to accomplish this.
im gonna be using a cree xp-g led Cree Engineering Support | Arrow Electronics - North American Components (NAC)
can anyone help me calculate what would be desired in a reflector and lens to do this?
do i even need a lens if i have a good reflector?
-nick


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Old 04-11-2010, 09:09 PM #2
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Default Re: flashlight led lens and reflector

Hi nkgamer1990,

There are probably more appropriate forums than this to find help with that project. Is it CPF, (Candle Power Forums)? They deal with flashlight modification.

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Old 04-16-2010, 09:17 PM #3
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Default Re: flashlight led lens and reflector

Go to CPF. I will say that the sources that collimate best (and hence, throw best) are laser diodes because of the sheer brightness coming from mere nanometers-wide spot.

Definitely check out CPF for flashlight mods. (DEFT comes to mind....)
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Old 04-17-2010, 11:12 AM #4
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Default Re: flashlight led lens and reflector

Quote:
Originally Posted by BShanahan14rulz View Post
I will say that the sources that collimate best (and hence, throw best) are laser diodes because of the sheer brightness coming from mere nanometers-wide spot.
Not necessarily, the biggest reason that lasers collimate so well with optics is because laser light is monochromatic, all the light refracts through optics to a constant and predictable degree. With a mix of wavelengths, you get something called chromatic aberration.
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Old 04-17-2010, 06:45 PM #5
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Default Re: flashlight led lens and reflector

I would use an aspheric lens, no reflector. You can get these from CPF market place or KD.

Or the Tiablo A9s:

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