"McR- xx" Reflectors

[milkyspit]

Can someone please help me?

Will both the MCR-20 and MCR-20 S work well with a Seoul led?

What is the difference in the beam?

Thanks!

McR20-S will have a more concentrated hotspot, which in turn allows it to throw farther. On the other hand, the regular McR20 will have a more gradual blend from hotspot to spill beam, for less throw but relatively brighter sidespill.

 

[Illumination]

McR20-S will have a more concentrated hotspot, which in turn allows it to throw farther. On the other hand, the regular McR20 will have a more gradual blend from hotspot to spill beam, for less throw but relatively brighter sidespill.

Thanks for the help!

 

[Th232]

Will Lunasol reflectors be available or are they all committed to Lunasols?

Curious about this, are they all in lights, or are there some (either -20s or 27s) lying around? Especially interested in -27s.

 

[McGizmo]

AndyTiedye and Th232,

The LunaSol reflectors were designed specifically for the LunaSol lights and in the case of the 27, in addition to the reflectors, I had mating LED pcb rings assembled in the same number. Yes, I have many of these left and no specific plans for them at present. Having them on hand though gives me options for tomorrow should I want to pursue other ideas. I still think a LunaSol head lamp has potential, for instance.

Candidly, another consideration where there could be a conflict of interest should I let some of these out, would be some LunaSol lights popping up that I had nothing to do with.

This thread was started a number of years ago and things have changed since then. For quite a while there was a lot of room to move around in and one could identify a niche and both focus on one area as well as "share" with others who toiled and cultivated elsewhere, with no conflicts. I could use my reflectors in current programs as well as others using them in other applications. There was plenty of room and plenty of opportunity for everybody.

 

[Th232]

Can fully understand your decision to not let these go, thanks for the response.

I was going through the reflector directory on your site, and I came across the 'prints for the McR-11-XR, and I'm a bit curious about it. A bit of digging came up with the McR-11 being used in Modamag's Dracos, but virtually nothing about the -XR version. If I may ask, what were these for, and is there anywhere that I can buy one?

 

[McGizmo]

I don't recall off hand but I think they were also for Modamag. I don't know if the shoppe has some of these or not. They might have been for another builder here on CPF. :shrug: :thinking: :shrug:

 

[brucec]

I still think a LunaSol head lamp has potential, for instance.

Sorry for the hijack, but :thumbsup:! And would it be a clickie?? Maybe with a high CRI Nichia flood??

 

[Th232]

I don't recall off hand but I think they were also for Modamag. I don't know if the shoppe has some of these or not. They might have been for another builder here on CPF. :shrug: :thinking: :shrug:

Thanks for the info, I'll take a look at the shoppe.

 

[LarsB]

Dear Don McGizmo,
dear Wayne dat2zip,
dear flashaholics,

I wanted to order some McR reflectors recently but I can't seem to find them on the Sandwich Shoppe website anymore?!?
What happened?
Thanks for any info, especially where to find/get them!

My projects so far: http://guest.engelschall.com/~sb/fluo-diving/#Equipment
Tests have shown my latest construction (http://picasaweb.google.com/ostbey/HowToBuildYourOwnUltravioletDivingLamp3) to be suboptimal for underwater fluorescence.
True UV LEDs as I have used (Nichia NCSU033B, Nichia NC4U133A, both with 365 nm) are more expensive, less efficient (in terms of lm/W) and less effective (in terms of fluorescence achieved) than blue LEDs (450 nm are considered optimal for underwater fluorescence).
I also used no reflectors at the time because I thought the viewing angle of the LEDs of 90 degrees would be optimal, but it turned out to be too wide.
Therefore I would like to replace the innards of my latest torch with blue LEDs and use reflectors this time.
I am thinking about using Luminus royal blue LEDs (http://www.luminus.com/products/datasheets/Luminus_SST-90-RGB_Datasheet.pdf).
So far I only found this reflector: http://www.led-tech.de/de/High-Power-Zubehoer/LEDIL-Optiken/LUMINUS-Lily-Reflektor-45/56%C2%B0-LT-1694_106_61.html
An opening angle of the beam of approximately 60 degrees is very important, as it has been found to be optimal for reef checks and photography and filming (http://guest.engelschall.com/~sb/fluo-diving/#RSEC).

BTW, any ideas where I could find a constant current source of 6 A (!) for the Luminus LEDs?!
(Not too big, because the space inside the lamp is 50 mm in diameter and about 50 mm in height?)

Thanks a lot!

Cheers,
LarsB

 

[fyrstormer]

http://theledguy.chainreactionweb.com/index.php?cPath=48_50_64

I see plenty of them.

 

[LarsB]

http://theledguy.chainreactionweb.com/index.php?cPath=48_50_64
I see plenty of them.

Hi fyrstormer,

thanks a lot for the link!

I entered "reflector" into the search function and got only the

17mm IMS Reflector

20mm IMS Reflector

27mm IMS Reflector

Camless M2 Light Orange Peel (LOP) Reflector
Camless M2 Medium Orange Peel (MOP) Reflector
Camless M2 Smooth (SMO) Reflector
Draco Reflector
O-ring for HD45 Reflector
Rebel 12 Flower Reflector Holder
Rebel Flower Reflector Holder

How did you get that longer list?!

I also still wonder about this:

(1) What is approximately the opening angle of the beam when using one of the McR-18, McR-19 and McR-20?
Unfortunately neither the specs under http://www.candlepowerforums.com/vb/showthread.php?91615-quot-McR-xx-quot-Reflectors
nor http://dmcleish.com/CPF/reflectors/ tell.
(2) What is the difference between a McR-XX and a McR-XX-S?
Just different measurements (e.g. from front/back) of the otherwise identical reflector?
(3) Any ideas on where to find a constant current source for 6 A?!

Again, thanks a lot!
LarsB

 

[fyrstormer]

I didn't search, I used the menu. "Mod Shoppe > Opticalware > Reflectors".

The difference between the McR20 and the McR20S is that one is designed for a Luxeon emitter and the other is designed for a Seoul emitter. The functional difference is the McR20S is slightly shorter at the back end, and the opening is slightly wider. That changes the focal point slightly. The -XR reflectors are designed for Cree XR-E emitters, which have a narrower beam pattern than other emitters.

The "Dimensions" PDF file for the McR19-XR says the diameter of the reflector is 16.71mm and the depth of the reflector is 19.89mm. When I use the trigonometry calculator linked below, with the radius of the reflector input as Side A and the depth of the reflector input as Side B, the result for Angle A is 22.79 degrees. So the beam angle for the McR19-XR is going to be approximately 2x that, which is 45.58 degrees.

http://www.carbidedepot.com/formulas-trigright.asp

 

[Mattaus]

Hopefully this is the right place to ask, but I'm wondering about the availability of shorter reflectors like the McR-8, McR-10 and McR-16. Is the Shoppe the only place that sells these? What if these were required in larger numbers than the Shoppe can accommodate?

 

[McGizmo]

The McR series of reflectors is basically history. Certainly as regards to aftermarket availability. Sorry.

 

[Mattaus]

Ah OK. I had that feeling lol. I'll keep searching for good, small sized reflectors