need help with a reflector

[las3r]

hi i have a flashlight with a p7 emitter and it has a wide spill and i would like to fix it so its has a tight beam, my question is where can i get a 1 5/8" reflector so it gives me a very tight beam ?? the stock refector is 1 5/8" any help would be nice :)

 

[Gunner12]

Having spill is a characteristic of a reflector. The light that doesn't hit the reflector becomes the spill. The Seoul P7 also has a larger emitting area, so naturally it should have a larger hotspot then the same reflector with a single die LED like the P4.

An optic might work better for you. Here's a spec sheet for one, but a quick search netted no stores.

 

[las3r]

thanks ill do a search and see what i find

 

[Gunner12]

Opps, forgot the link to the spec sheet, here it is:

http://www.sekonix.com/upload/p7-2.pdf

 

[Al Combs]

LITEmania is selling the Sekonix with either narrow or medium filter. In addition to the Sekonix Series-2 optic, there is also a Series-1. They are both very similar. Warren doesn't say which one he is selling. But since it's available with a medium filter, it must be a Series-1. Series-2 has no medium attachment lens.

The Series-1 gives a 10,062 lux output @ 1 meter vs 9,600 lux @ 1 meter for a Series-2. That's with both using their respective narrow snap-on lens. They don't say to what level of power they are driving the P7. Just that the bare LED puts out 235 lux @ 1 meter. That's 42.8x increase of output for the Series-1 TIR optic. By comparison the 28 mm Khatod smooth reflector for the P7 only has a 20x hot spot intensity compared to a bare P7.

 

[Gunner12]

I didn't know LITEmaina had it. Thanks for the link!

 

[ma_sha1]

hi i have a flashlight with a p7 emitter and it has a wide spill and i would like to fix it so its has a tight beam, my question is where can i get a 1 5/8" reflector so it gives me a very tight beam ?? the stock refector is 1 5/8" any help would be nice :)

1 5/8' is 41.3 mm, you are in luck!

One of the best P7 reflector is this one from Dx.
http://dealextreme.com/details.dx/sku.17385, it's 41.5mm.

It's made for MCE, so you need to use a step drill bit to open the hole up
a bit. It gives a very tight beam for P7, as tight as full sized 52mm P7 reflectors!

usually, smaller reflectors don't throw as far, but this is an exception!

 

[Al Combs]

I didn't know LITEmaina had it. Thanks for the link!

Glad to help. :thumbsup:

I've had the Sekonix bookmarked for a while now. You can't fit 3 of them in a MagLite so I thought I'd wait and see what people said about it. I did a forum search for, "Sekonix" and got a few interesting hits. The first was pepko's quad MC-E from about a year ago. At the very end of the first post in that thread, he links to a forum with a comparison between his quad MC-E and, "Aurora AK-P7 (sku.12624) and with Ultrafire C2@SSC P7 DSVNJ + Sekonix Col#1 narrow optic". The AK-P7 and the Sekonix/C2 while not directly compared, shows the stock AK-P7 to be both brighter and having a tighter beam than the DSVNJ C2 with the narrow filtered Sekonix TIR. What's up with that? :thinking:

The other one was a jirik_cz response to Firecop thread. I ran it through Google language translate for Czech. It was close enough to get the idea. Some good pics there. Post number 6 has a picture with multiple beamshots in the same picture. Even after he put the narrow filter on the collimator, you can still see the individual dies of the P7. It's not as bright or as narrow a hot spot as the stock C2 reflector. It looks like you give up the spill for nothing. BTW he didn't say that, it was just my impression from looking at the pictures.

 

[ma_sha1]

The center of TIR acts like aspheric lens, thus, 4 dies at tight focus. same reason carlos xpe TIR gives squre hot spot. Medium TIR de focus to get round beam but at a cost of throw.

 

[Al Combs]

The focused LED die wasn't quite as noticeable on your XP-E Soli-mod. The really surprising thing is it's not even as bright as an ordinary reflector. Surprising in the sense of what the OP had in mind, to take some of the spill and put it in the hotspot. You could almost live with the P7 cross if it made the hotspot a lot brighter. Apparently that doesn't seem to work very well in this case.

The $3.68 DX reflector you pointed to looks very similar to the reflector in the AK-P7. Apart from as you say the need for slight reaming. The reflector sounds like a much better solution than the TIR. I wonder if the OP has an Aurora AK-P7. He never did say what he was modding.

 

[ma_sha1]

The $3.68 DX reflector you pointed to looks very similar to the reflector in the AK-P7. Apart from as you say the need for slight reaming. The reflector sounds like a much better solution than the TIR. I wonder if the OP has an Aurora AK-P7. He never did say what he was modding.

I agree that little reflector can be really hard to beat.
Just can't say enough about this cheap little reflector from Dx, I've seen another post on CPF who was impressed with this reflector. kind of surprising that there not more people played with it & discovered the little affordable Gem.

It was really a surprising to me when I bored it out for P7, it gave a strong throw & center hot spot with no cross or dark void at all. It gives such a perfect beam rival that of the SST/SSR single die.

The little P7 & it's reflector is shown in my SSR-90 build thread as reference, some beam shots on the p7 with that 41.5mm reflector can be seen there.

http://www.candlepowerforums.com/vb/showthread.php?t=238232&page=2

The only problem I see is that you never know what you get from DX & if they make changes, they won't tell you.

 

[Al Combs]

The little P7 & it's reflector is shown in my SSR-90 build thread as reference, some beam shots on the p7 with that 41.5mm reflector can be seen there.

http://www.candlepowerforums.com/vb/showthread.php?t=238232&page=2

I remember this one now, the shower head. I didn't realize that's the one you were talking about. You're right, nice beam.