Random idea for multi-die LED flashlights

Agro · 2018-12-22T17:46:26.000Z

Hmm…even 100 lm/W is not a dream efficacy when making high output flooders. So I think for that class of lights LEDs are going to remain the primary choice for a while….so the arrangement discussed in this topic is not going to be made obsolete by out-of-focus lasers soon.

BTW recently I realized that I love aspheric flooders, that uniform beam is just awesome.
And I like aspheric throwers. With some efficiency improvements (f.e. precollimator) I would love them as well.
I don’t love the intermediate beam though.

With the arrangement that Enderman proposed in this thread a single light can be a high-output high-cri smooth-beam flooder as well as high-intensity thrower.

Which would be an awesome combo.

Enderman · 2018-12-22T19:11:19.000Z

The_Driver:

50% sounds a bit low. Are you not using cylindrical correction optics? They are expensive, but they should increase the efficiency quite a bit.

Nope.
First I need to find out if I will burn through the crystal or not.
If it doesn’t then I will try additional optics.
It would be a waste for me to spend $500 on an acylindrical lens just to end up not being able to use it because the power is too much.

The_Driver1 · 2018-12-23T01:44:57.000Z

Ok, makes sense.

500$ sounds like a bit much. You should be able to get it for around 100$.

Enderman · 2018-12-23T01:54:37.000Z

The_Driver:

Ok, makes sense.

500$ sounds like a bit much. You should be able to get it for around 100$.

https://www.edmundoptics.com/f/acylinder-lenses/14810/

Lexel · 2018-12-23T02:33:53.000Z

Enderman:

The_Driver:

Ok, makes sense.

500$ sounds like a bit much. You should be able to get it for around 100$.

https://www.edmundoptics.com/f/acylinder-lenses/14810/

most commertial use 2 prisms to correct the beam

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.