Random idea for multi-die LED flashlights

Enderman · 2018-12-23T02:52:13.000Z

Lexel:

most commertial use 2 prisms to correct the beam

But what this does is expand the fast axis to match the slow axis, see image below, then you require a third lens in order to focus the light down.

The other option is to contract the slow axis so that it diverges less, like the fast axis, then use a second lens to focus the light to a point.

Even if you use the first method I’m pretty sure an acylindrical lens will perform better than the cylindrical one, for the same reason you can focus an LED with an aspheric lens and not a spherical one.

Enderman · 2018-12-23T02:51:24.000Z

Also keep in mind that what we’re trying to do here is make the spot square and then focus it down to a point, not collimate it.

The_Driver1 · 2018-12-23T13:35:58.000Z

You don’t need to buy these kinds of lenses from the most expensive shop for lenses.

I would start by searching on Laserpointerforums.

Agro · 2019-03-01T17:52:03.000Z

There are 2 other LEDs that may be good when used that way:
Lumileds Luxeon CZ

CRI90 throw LED surrounded by Oslon Pures?

Lumileds Luxeon Neo

CRI70 only but 1.28 mm² package and may throw OK

EasyB · 2019-03-01T18:25:23.000Z

Agro:

There are 2 other LEDs that may be good when used that way:
Lumileds Luxeon CZ

CRI90 throw LED surrounded by Oslon Pures?

Lumileds Luxeon Neo

CRI70 only but 1.28 mm² package and may throw OK

If the dies don’t form a continuous light-emitting surface you will have dark rings in the beam. I learned this with my experiments with a 3x3 array of cree XD16 dies. The array formed a nearly continuous surface, but the slightly darker areas where the die corners meet caused a noticeable dark ring.

Cree XD16 measurements Flashlight Modding and DIY Parts

I sliced out the small sections of silicone that were charred then covered the surface and filled the gaps with silicone. I used permatex “flowable” windshield repair silicone. After letting it cure for a day I again tested the LED at 20A. After a couple minutes I saw another spot in a gap that started to burn. I again carved the dark areas out and tested again. The LED was fine for 5min at 20A so I decided to go ahead and put it in the emisar D1S. [image] [image] Above is a beamshot of the D…

Agro · 2019-03-01T18:28:19.000Z

That was in full focus. I view this idea as best used in a zoomie. In full focus - use just one LED. Move the optics some and the dark rings are gone, you end up with smooth and bright flood or intermediate beam.

Agro · 2019-03-06T15:42:51.000Z

I’m not really sure…any chance that Samsung LH309A would be suitable?

Agro · 2019-03-14T08:31:28.000Z

Random idea:
Would XQ-E HI surrounded by 8 XD16 work well? Such array would be around 5x5 mm with plenty of flood. Would it throw better than 9 XD16? I don’t know, maybe.

LouieAtienza · 2019-03-16T22:00:27.000Z

They make color-mixing hybrid reflectors, mainly for things like RGBW or tunable-CCT emitters. So the emitting surface does not necessarily need to be on-center.

Enderman · 2019-03-17T07:50:08.000Z

LouieAtienza:

They make color-mixing hybrid reflectors, mainly for things like RGBW or tunable-CCT emitters. So the emitting surface does not necessarily need to be on-center.

Blurring dies together for the purpose of mixing colours completely defeats the purpose of having a variable lit area die for maximum throw with a lens.

Also, it is not possible to have a parabola concentrate light from different sources into a single spot.

Xandre · 2019-03-17T09:39:43.000Z

Or you take more lenses or more reflectors and put together

The Beast - Flood+Throw Featured Mods

Hi, a light build initially by fritz15 for Xandre. I think it needs an extra thread here. At the moment i am modding it. Measured at 960 KLux/Kcd and 6600 Lumens. Up/down controls the thrower LED right/left controls the floodies. More Pictures from left to right BTU Shocker, Beast, Solarforce S1100, Skyray King Gold [image] [image] [image] [image] [image] [image] [image] [image] [image] [image] [image] XP-G2 Triple [image] XP-L Triple [image] [image] [image] Greetin…

LUMENSTEINS LUX MONSTER Flashlight Modding and DIY Parts

Now, we are trying to get the ~2 Mio LUX with 3LEDs (Fritz 15,Andi and Xandre) here: The Host: http://www.ebay.de/itm/Halogen-Scheinwerfer-Handscheinwerfer-Handlampe-10-Mio-/300869577684?pt=LH_DefaultDomain_77&hash=item460d396bd4 The driver : 5A Reflector : 3 Pieces SR 90 Olight LED : 3 XP G2 @ cooper-sinkpad from nitro,dedomed Regards Xandre

Regards Xandre

Agro · 2019-03-17T11:54:27.000Z

Tradeoffs, tradeoffs, tradeoffs everywhere.

Mixed optics trade frontal area (and therefore throw) for versatility. But as multi-LED lights tend to have shallow heads, throw/volume can be quite good. I like that.

Aspheric zoomie with Boost HX surrounded by Oslon Pures (or other CSP LEDs) with a Wavien collar is as throwy as it gets. And is an OK flooder as well. But not very efficient in a throw mode. And making it efficient flooder is not straightforward. And the tint shift from throw to flood is big. And cost is very big.
Such zoomie would offer way better combination of a flooder and a thrower in a single host than I’ve seen so far. And would be way way smaller than 2 specialized lights while being just as good at thow and 90% as good at flood. A dual-head light could compete better than a pair of individual ones - but still it would be significantly larger.

LouieAtienza · 2019-03-17T19:16:04.000Z

Any tool that’s adequate at two things is not great with either. They say here, Jack of all trades, master of none.

I kind of like the configuration of the X70. But if they could put a White Flat in the center with a larger reflector oreven fixed aspheric, then a perimeter ring of Nichia LEDs or whatever… Sort of like those prjector headlamps with the halo ring.

LouieAtienza · 2019-03-17T19:21:15.000Z

Or how about a 2-headed light? I always wanted to mod an S2 this way somehow, with a narrow spot TIR on one side and 3 up frosted wide spot TIR on the other. Somehow incorporate a gyroscope inside so the light knows when you spin it around to activate the correct light… Or two forward switched wired 3-way so when you flip around and turn on one side the other side turns off…

Enderman · 2019-03-17T19:52:57.000Z

Xandre:

Or you take more lenses or more reflectors and put together

The Beast - Flood+Throw

LUMENSTEINS LUX MONSTER

Regards Xandre

LouieAtienza:

Or how about a 2-headed light? I always wanted to mod an S2 this way somehow, with a narrow spot TIR on one side and 3 up frosted wide spot TIR on the other. Somehow incorporate a gyroscope inside so the light knows when you spin it around to activate the correct light… Or two forward switched wired 3-way so when you flip around and turn on one side the other side turns off…

The point of this is to have a single optic that is used both for throw and flood.
Otherwise you’re wasting front area that could be used for more throw.
To have the most throw per frontal area it needs to be a single lens.

LouieAtienza · 2019-03-18T01:24:29.000Z

Enderman:

Xandre:

Or you take more lenses or more reflectors and put together

The Beast - Flood+Throw

LUMENSTEINS LUX MONSTER

Regards Xandre

LouieAtienza:

Or how about a 2-headed light? I always wanted to mod an S2 this way somehow, with a narrow spot TIR on one side and 3 up frosted wide spot TIR on the other. Somehow incorporate a gyroscope inside so the light knows when you spin it around to activate the correct light… Or two forward switched wired 3-way so when you flip around and turn on one side the other side turns off…

The point of this is to have a single optic that is used both for throw and flood.
Otherwise you’re wasting front area that could be used for more throw.
To have the most throw per frontal area it needs to be a single lens.

LOL did you read what I posted? A head on EACH END of the light. What frontal area do you waste when you use the rear of the light?

Enderman · 2019-03-18T01:30:23.000Z

LouieAtienza:

LOL did you read what I posted? A head on EACH END of the light. What frontal area do you waste when you use the rear of the light?

Oh in that case you waste internal space making the light longer, still a waste when you have a perfectly good optic at one end already.

LouieAtienza · 2019-03-18T01:49:20.000Z

Enderman:

LouieAtienza:

LOL did you read what I posted? A head on EACH END of the light. What frontal area do you waste when you use the rear of the light?

Oh in that case you waste internal space making the light longer, still a waste when you have a perfectly good optic at one end already.

What’s good for throw may no be necessarily good for flood, and vice versa. No matter what you do, there will always be compromise - that’s exactly what engineering is. The good thing with a double-ended light is that the flood end can have a rather short optic - or even none at all; it could even be a mule on the other side with a diffuser lens.

Enderman · 2019-03-18T02:04:36.000Z

LouieAtienza:

What’s good for throw may no be necessarily good for flood, and vice versa. .

Congrats, you now understand why I came up with this idea.
So that you could have the option of max throw or max lumens without having to compromise with a large LED that gets a lot of lumens/efficiency but less throw, or a thrower LED that makes fewer lumens with low efficiency.

LouieAtienza · 2019-03-18T03:48:50.000Z

Enderman:

LouieAtienza:

What’s good for throw may no be necessarily good for flood, and vice versa. .

Congrats, you now understand why I came up with this idea.
So that you could have the option of max throw or max lumens without having to compromise with a large LED that gets a lot of lumens/efficiency but less throw, or a thrower LED that makes fewer lumens with low efficiency.

Well then no congrats to you, because you can have a reflector that’s great for throw, but not necessarily hot for flood and vice versa. Snide comments aside, you could just get something like a BLF GT, which happens to have a rather large flat at the focal plane, and add a ring of LEDs there. And it still probably wouldn’t have as good a flood as if it had a shorter reflector. So no matter what, there’s always some compromise - I won’t call a possible 40-50 degree beam much of a flood, but I suppose it’s all relative. For you, 10 degrees is probably considered flood.

But there probably are more oddball ideas out there… how about making a recoil flashlight, that has a forward facing COB in the center where the aperture is? The SyniosBeam has a large aperture on the reflector, which would fit a nice sized COB. Something scaled down to a more familiar format might be cool?