lens

ktheo

Newly Enlightened
Joined
Aug 1, 2010
Messages
19
what is the point and function of an asphyric lens? I see them on many flashlights and it looks like then are domed or bubbled up...
 
I will spare you for asking such a silly question. Everyone was a noob at one point :nana:

The lens is used to magnify the light from the LED and focus it into a tight beam, and small hotspot with little to no flood light. This is great for spotlights, and long range flashlights. It is not recommended to be used with a reflector, as that would create flood light, witch for most applications would be considered to be just a distraction.

Here is my favorite aspheric mod on a flashlight. Made by Pepko.

Here is a great link, it demonstrates how exacty curved glass can change the direction on light. A member here on CPF originally posted this, but I cannot find the post.

Oh, and :welcome:
 
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what is the point and function of an asphyric lens? up...

Like SmurfTac already said the aspherical head really tightens the beam up and maximizes it for nothing but throw, with little to absolutely no spill. Use the CPF search box and type in "best aspherical lights" to see examples.
 
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