Anyone tried making a DIY round LED?

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Enderman
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Anyone tried making a DIY round LED?

Has anyone tried turning a square die LED into a round one by putting a mask on top?
Like a small piece of aluminum foil with a circular hole?
It would lower the lumen output a bit but the intensity should stay the same.

I’m sure this idea has been discussed before but I can’t find any pictures or threads about someone trying it.
The SBT-70 is discontinued, and the CBT-140 isn’t very practical or efficient.

djozz
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As far as I remember it has not been tried, and some alufoil might actually add a tiny amount of luminance to the center bit by recycled light.

There are some leds however, leds with sharply curved domes like the SSL80 but also the 219A, that when focussed a bit above the die, so the focal plane into the dome, produce a round hotspot without visibly loosing luminance. It is an observation that I did but never did any measurements on it.

link to djozz tests 

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Enderman
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Yeah I also thought it might increase luminance a little.
I was mostly thinking about this for flat LEDs like the black flat, CFT90, XPL HI, XHP35 HI, etc.
A sharp round spot would be perfect for zoomies without losing candela Smile

Aluminum foil is the only thing I could think of that is super thin, doesn’t burn, and blocks 100% of light.
Idk if anyone else has other ideas.

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Batsignals for the win!!!

 

How about carefully painting the dome with black permanent marker? And well, now that we're here mirror spray paint would be the best option imho because of light recycling phenomena.

 

Cheers Smile

EasyB
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I usually do mods to increase lumens downrange. Crazy

Enderman
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Yeah but there’s something about an aspheric LED thrower with a round spot that is so unique Shocked

CRX
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Thought about it.
Managed a hex.

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I want a zoomie with a round spot. I’d like to find a few SBT-70 leds.

Enderman
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If anyone knows where to find SBT70s please share Smile

I might try putting a piece of foil with a hole over an oslon black flat soon to see if I can get a nice circular spot.

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Just use a MT-G2. Works perfect in a Jaxman Z1. Love it.

You can also use a Nichia 319AT as well. I know both are hexagon but it’s the closest you get to round, minus an SBT.

https://en.wikipedia.org/wiki/John_3:16 

Flashlights:

x6 Sk68 modded 3 Nichia 319AT, 3 Cree XP-G3 - x1 Solorforce P60 drop in custom XM-L2 U4 1C, Qlight Rev.A 7135*8 3.04A Driver - x2 Lumintop EDC05 CW - x2 Jaxman E2L tripple XP-G2 S4 
x1 Jaxman Z1 Zoomie, Cree MT-G2 Q0 LED - x1 Acebeam K40m thrower with MT-G2 Q0 LED - x1 Xintd SC-82 V5 Limited Edition C8, XM-L2 U4 1C, Qlight Rev.A 7135*8 3.04A Driver
x1 Convoy L6 moded with a Cree XHP-70.2 P2 1D LED - x1 Rare Olight x7 Maurauder with a Nuetral White LED - x1 Astrolux MF-01 Nichia 219c - x1 Astrolux MF-01 Cree XP-G3 - x2 Zebralight SC5w MKII  

x6 Lumintop Tool AA - x1  Olight i3E EOS - x2 Zebralight SC600w Plus MK IV XHP 50.2 4500k 80 CRI - x1 Fenix CL30R - x1 Lumintop C01 Bike Light

lights_and _pieces
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CRX, those are green and blue, color LEDs.

CRX
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Right. I just did quick search on fone, didn’t check colour Blushing
I’m sure you can still get white, will have a look.
Aliexpress
https://m.aliexpress.com/item/32407291792.html

Enderman
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sovereignknight wrote:
Just use a MT-G2. Works perfect in a Jaxman Z1. Love it.

You can also use a Nichia 319AT as well. I know both are hexagon but it’s the closest you get to round, minus an SBT.


Hexagons are nice, not as nice as a circle though Smile
I would use those hexagon LEDs if they had better cd/mm^2.
Enderman
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CRX wrote:
Right. I just did quick search on fone, didn’t check colour Blushing
I’m sure you can still get white, will have a look.
Aliexpress
https://m.aliexpress.com/item/32407291792.html

Oh cool, thanks.
$70 though :/ lol
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Nice lookin emitters though Big Smile

vt2nv
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Jacob A60 Big Smile

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CRX (The master of cool units)

If you could help me figure out how to get these emitters t work that would be so cool.

Maybe a 2018 Custom build contest entry?

Who can figure out how to use these 95CRI 3000K massive emitters

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Enderman wrote:
If anyone knows where to find SBT70s please share Smile

I might try putting a piece of foil with a hole over an oslon black flat soon to see if I can get a nice circular spot.

Maybe THE SORAA emitters will work Or are the TOO LARGE?

(“It’s good that most people can’t remember their previous lives. Otherwise
things would be a lot more complicated than they already are.”
Ajaan Lee Dhammadharo)

Enderman
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Ronin42 wrote:

Maybe THE SORAA emitters will work Or are the TOO LARGE?

Those are COBs, not single die LEDs.
Round COBs are not new, there’s tons from cree and citizen.
They are for producing a lot of lumens, they suck for flashlights because they require very high voltage and also have a huge die size and low intensity.
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Enderman wrote:
Ronin42 wrote:
Maybe THE SORAA emitters will work Or are the TOO LARGE?
Those are COBs, not single die LEDs. Round COBs are not new, there’s tons from cree and citizen. They are for producing a lot of lumens, they suck for flashlights because they require very high voltage and also have a huge die size and low intensity.

Got it.

(“It’s good that most people can’t remember their previous lives. Otherwise
things would be a lot more complicated than they already are.”
Ajaan Lee Dhammadharo)