Well, the thread title is Intersting Optics Thread, not beautiful beamshots against white wall… But I’ll reserve judgment until I see what something like the Illumivation light does….
LOL yes should have inserted an emoji there. But that’s a home made thing. I would like to see the beam pattern of the Illumivation light and how it compares to the multi-reflector lights. I would think with the emitters a lot closer together it would minimize the petaling effect I’ve seen with multi-reflector lights.
you’ve been watching the you tube vids haven’t you?
whats worse than useless? an uboxing,
whats even worse than unboxing vids?
a mirrion candella flashlight beam on a house wall at ‘’wow that’s a good 30 feet away’’….or even…du dahhhhh 5 feet in the the airing cupboard lol. we need yards not feet, hundreds of them lol.
ok…if you just want to see the shape a 5 foot away wall will show the spill and spot………in a 5 foot room no less lol. my head hurts.
Looks like they’ve been defunct for a few years now. Doesn’t look like they ever brought these to the market, they look more research-oriented.
But this is interesting too - I’ve seen this (middle) style before, I assumed its purpose was to produce a floody beam, but no:
And that last lens is indeed interesting. Though it sacrifices some frontal area. And need a windown in the front to get waterproofing (which reduces efficiency by enother 1% or so). Too bad the paper doesn’t describe it better….
For example:
LL01CR-CTKxxL02-P is 49.5 x 7.8 mm designed to produce narrow (10 degree) beam with 3535 LEDs. Can’t find a datasheet for it though.
21700 thrower with 52 mm head and 100 mm length?
Or V-Cut LL01CR-DAWxxL52, smooth beam thrower lens (how does it compare to OP?), 45 x 10.85 mm.
You can have a look at the LPI patents if you want the gory details. Or this, it’s a bit easier to read. I have also found their book “Nonimaging Optics”, very interesting but so complex that I can’t even scratch the surface.
Looks like these things were a bit of a byproduct of researching solar concentrators for multi-junction cells.
I’ve always been partial to Ledil lenses since they had numerous choices for 35mm optics for single or multiple LEDs. The Cute-3 S and GT4-XP-S paired nicely with 32mm triple and quad mcocb’s.
I intended to write about Fresnelized TIRs for a while…
A simple TIR lens guides light on 2 paths:
The light emitted forward is refracted as it enters the lens and again as it leaves it.
The light emitted sideways is refracted, TIR-reflected and refracted again.
It is possible to fold one or more surfaces to reduce height. Some call this TIR-R, some Fresnel-TIRs.