Multiple emitters with Aspheric lens

[acourvil]

Has anyone tried using multiple emitters with an aspheric (concentrator) lens? If there is not a single light source at the center, but rather several close to the center, how does that effect the beam? I've been meaning to try this for a while, but have not gotten around to it.

 

[Mr_Light]

Thinking about the Tri-Rebel Star?

 

[acourvil]

Ummm . . . tri Cree R2 actually

 

[LukeA]

That won't work well at all.

 

[acourvil]

Maybe you could provide a little data or reasoning as well as the conclusion?

 

[bluecrow76]

I've got three 17mm aspheric lenses on the way. I'm going to try my hand at a multi-emitter multi-lens tri-build. Wish me luck!

 

[LukeA]

Maybe you could provide a little data or reasoning as well as the conclusion?

These lenses are designed with a point source of light as ideal. Multiple emitters do not provide anything close to a point source.

 

[acourvil]

These lenses are designed with a point source of light as ideal. Multiple emitters do not provide anything close to a point source.

That makes sense. I haven't worked much with this kind of lens and can't really picture what the beam characteristics would be with multiple sources. Given that you can focus one emitter to project a a "picture" of the emitter (which itself is not a single point), I thought it might be possible to focus multiple emittters to the same kind of projection, although it would seem that the further you move away from the focal point, the more likely you would get undesirable results.

 

[TorchBoy]

I'm going to try my hand at a multi-emitter multi-lens tri-build. Wish me luck!

Sounds like the way to go, except that you need presence of mind and a bit of skill, not luck. :thumbsup: