BLF recoil über-thrower

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Enderman
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Jerommel wrote:
Hey guys, Just got my mirascope in, and as a mirascope it's not impressive, at all... The mirror surface is a bit messy unfortunately.. But, a quick test with an XP-E2 light looks kind of hopeful none the less. This evening when dark outside i will see if it's worth working with or just a waste of time and money.

Another benefit of large reflectors is that imperfections/aberrations have less effect on the beam Wink

Like, look how ugly this is, yet it still throws several kilometres xD

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Jerommel
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Meanwhile it got dark outside, so i can do some beamshots.
I placed a ‘screen’ in the garden, will be projecting out the window. Smile

Q

Enderman
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Nice setup!

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Oh, I am SO looking forward to this! Wink

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Well, i’m eating now, i tried some stuff, and well, it works, but..

Beamshots will follow later…

Q

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I have to admit, I didn’t think this idea would be taken to this level. Great to see people really putting the effort into something new!

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Okay, some beamshots then:

And compared with Jacob A6:

I should have used a tripod..

So with the same power it seems to throw more light in the right direction than an A60.
This was only 10 meters distance to the screen, so i’m still not sure what it will do over longer distances.

Quite a bunch of anomalies around the hotspot, which seem to come from the outer perimeter of the recoil reflector.
Will do some more pics later to investigate further.

Q

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What bin XR-E and XP-E are you using? I’m wondering how much of the difference is from the emitters themselves. Or, possibly, the difference in emitters could be working the other way, depending on bin, so the difference from the reflector set-up might even be more than shows in the pics!

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DavidEF wrote:
What bin XR-E and XP-E are you using? I’m wondering how much of the difference is from the emitters themselves. Or, possibly, the difference in emitters could be working the other way, depending on bin, so the difference from the reflector set-up might even be more than shows in the pics!

I have no idea what bin those LEDs are.
The XP-E is from a SingFire 348, so probably nothing special, The XR-E is how i bought the Jacob.
I was assuming it would be similar enough.

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Enderman
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Sweet.

What's the diameter of the spot?

Is this focused to a point or focused to infinity (collimated)?

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Dang, camera battery empty…
I’m trying approx. 20 meters now, but either way, this thing does a nice job throwing in the good direction, but a better reflector would have been considerably better, i think..

Q

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Enderman wrote:

Sweet.


What’s the diameter of the spot?


Is this focused to a point or focused to infinity (collimated)?


The spot @ 10 meters is approximately 50 cm in diameter.
This is a compromise between collimation and focussing, it’s “the best it can do” so to speak.

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Jerommel wrote:
The spot @ 10 meters is approximately 50 cm in diameter. This is a compromise between collimation and focussing, it's "the best it can do" so to speak.

That is a 1 degree half angle beam divergence, very good for a toy reflector! Smile

Do you have a luxmeter to measure?

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Enderman wrote:

Jerommel wrote:
The spot @ 10 meters is approximately 50 cm in diameter. This is a compromise between collimation and focussing, it’s “the best it can do” so to speak.

That is a 1 degree half angle beam divergence, very good for a toy reflector! Smile


Hmm, when you put it like that, i guess it’s not too bad. :)
Quote:

Do you have a luxmeter to measure?

No i don’t have a lux meter (yet)
I thought i’d compare it with a known light: the Jacob A60.
The recoil setup seems to outthrow the Jacob hands down, which is not bad either.

Q

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By the way, the XP-E is soldered on a 1.8 mm diameter copper wire, and it seems to be enough for about 1 watt.
Cools better than i expected.

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Jerommel wrote:
Hmm, when you put it like that, i guess it's not too bad. Smile

No i don't have a lux meter (yet) I thought i'd compare it with a known light: the Jacob A60. The recoil setup seems to outthrow the Jacob hands down, which is not bad either.

Hmm that's alright I guess. Maybe look into buying one in the future if you're into flashlights a lot, I got one for $50 a while ago and it has been extremely useful.

 

For myself, I also contacted a company that makes real reflectors, and it's like $700-1000 for a nice 16 or 20" reflector xD a bit pricey!

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Jerommel, maybe I missed it somewhere, what is the diameter of that reflector you tested? Looks pretty big.

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djozz wrote:
My blue laser is this one from Banggood, bought it for no valid reason at all, and I’m pretty scared switching it on, even with green glasses that absorb almost all of it. It is actually even 2.5W.

Still not sure about doing the experiment Sad

http://www.banggood.com/445nm-2_5W-2500mW-Blue-Laser-Module-With-Heatsin...


Having a 445nm blue laser,I use these protecting goggles,which are red. http://www.banggood.com/405nm-445nm-532nm-Anti-Blue-Viole-Light-Laser-Go....
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Theodore41 wrote:
djozz wrote:
My blue laser is this one from Banggood, bought it for no valid reason at all, and I’m pretty scared switching it on, even with green glasses that absorb almost all of it. It is actually even 2.5W.

Still not sure about doing the experiment Sad

http://www.banggood.com/445nm-2_5W-2500mW-Blue-Laser-Module-With-Heatsin...


Having a 445nm blue laser,I use these protecting goggles,which are red. http://www.banggood.com/405nm-445nm-532nm-Anti-Blue-Viole-Light-Laser-Go....

The green glasses reduce the power to about laserpointer power so I can still see the beam. I will still be careful with the glasses on.
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pilotdog68 wrote:
Jerommel, maybe I missed it somewhere, what is the diameter of that reflector you tested? Looks pretty big.

About 14 cm / 5½ inch parabole.

Q

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Enderman wrote:

Jerommel wrote:
Hmm, when you put it like that, i guess it’s not too bad. Smile

No i don’t have a lux meter (yet) I thought i’d compare it with a known light: the Jacob A60. The recoil setup seems to outthrow the Jacob hands down, which is not bad either.


Hmm that’s alright I guess. Maybe look into buying one in the future if you’re into flashlights a lot, I got one for $50 a while ago and it has been extremely useful.


 


For myself, I also contacted a company that makes real reflectors, and it’s like $700-1000 for a nice 16 or 20” reflector xD a bit pricey!

I would still very much like to find an approx. 5 inch one that can capture 135°, although 120° would make me happy too. Smile

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Jerommel wrote:
pilotdog68 wrote:
Jerommel, maybe I missed it somewhere, what is the diameter of that reflector you tested? Looks pretty big.

About 14 cm / 5½ inch parabole.

So not exactly a same-same comparison to the A60 lol

Sounds like you need to make a custom build for next year’s competition!

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Jerommel wrote:
I would still very much like to find an approx. 5 inch one that can capture 135°, although 120° would make me happy too. :)

Currently it does more than 135, does it not?

You can always trim away like 1/2" off the edge of the reflector...

I haven't modeled the 6" mirascope reflector, so idk how much it actually is capturing.

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pilotdog68 wrote:
Jerommel wrote:
pilotdog68 wrote:
Jerommel, maybe I missed it somewhere, what is the diameter of that reflector you tested? Looks pretty big.

About 14 cm / 5½ inch parabole.

So not exactly a same-same comparison to the A60 lol
Indeed not..
But it’s a similar LED die and and both run 180 mA (low mode on A60 and with variable resistor 3x AA NiMH for the recoil)
Quote:

Sounds like you need to make a custom build for next year’s competition!

Planning to join next year’s competition for sure, but probably not with this reflector..

Q

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Enderman wrote:

Jerommel wrote:
I would still very much like to find an approx. 5 inch one that can capture 135°, although 120° would make me happy too. Smile

Currently it does more than 135, does it not?

Yeah, you’re right.
I thought it was like 120° but it’s actually 140°
This may explain why it does considerably better (lumen / wise) than the A60.
When my camera battery is full i’ll do some shots from the screen towards the LED, hopefully it will show how much of it is actually doing the good work.
It seems the outer perimeter of the reflector is a little ambiguous though.

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Jerommel wrote:
Yeah, you're right. I thought it was like 120° but it's actually 140° This may explain why it does considerably better (lumen / wise) than the A60. When my camera battery is full i'll do some shots from the screen towards the LED, hopefully it will show how much of it is actually doing the good work. It seems the outer perimeter of the reflector is a little ambiguous though.

Ok cool. Also, what's this competition people are talking about?

Jerommel wrote:
\Planning to join next year's competition for sure, but probably not with this reflector..
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Enderman wrote:

Jerommel wrote:
Yeah, you’re right. I thought it was like 120° but it’s actually 140° This may explain why it does considerably better (lumen / wise) than the A60. When my camera battery is full i’ll do some shots from the screen towards the LED, hopefully it will show how much of it is actually doing the good work. It seems the outer perimeter of the reflector is a little ambiguous though.

Ok cool. Also, what’s this competition people are talking about?


Jerommel wrote:
\Planning to join next year’s competition for sure, but probably not with this reflector..

The contest everyone is talking about is the Annual Scratch-built Flashlight Contest which has recently closed for this year, and winners haven’t even been announced yet.

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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I made some nice and grainy shots facing the light from about 20 meters away, light on extremely low power of course:

Left is taken from left, middle from the middle and right from the right of the hotspot.
I conclude the outer perimeter of the parabola reflects too much inward, the ring section inside that is okay, inside that one seems to reflect a little too much outward, the middle is okay.
(The most outward perimeter is not parabolic but flat so that does nothing at all.)

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Jerommel wrote:
I made some nice and grainy shots facing the light from about 20 meters away, light on extremely low power of course Left is taken from left, middle from the middle and right from the right of the hotspot. I conclude the outer perimeter of the parabola reflects too much inward, the ring section inside that is okay, inside that one seems to reflect a little too much outward, the middle is okay. (The most outward perimeter is not parabolic but flat so that does nothing at all.)

 

Yeah looks like a bad parabola, that's unfortunate. You're getting the same effect that djozz got with the outer part of the parabola focusing inwards.

It should still work alright for a handheld flashlight, but probably won't get 1M lux :/

 

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Enderman wrote:

Jerommel wrote:
I made some nice and grainy shots facing the light from about 20 meters away, light on extremely low power of course Left is taken from left, middle from the middle and right from the right of the hotspot. I conclude the outer perimeter of the parabola reflects too much inward, the ring section inside that is okay, inside that one seems to reflect a little too much outward, the middle is okay. (The most outward perimeter is not parabolic but flat so that does nothing at all.)

 


Yeah looks like a bad parabola, that’s unfortunate.

Yeah, that sucks a little…
[quote wrote:
You’re getting the same effect that djozz got with the outer part of the parabola focusing inwards.
..and then a ring that’s okay, and than a ring that reflects outward, and then another change in angle…
Considering glueing rings on the back pushing and pulling it in shape, but…
Quote:

It should still work alright for a handheld flashlight, but probably won’t get 1M lux :/


 


Not sure it’s worthwhile to continue with it.
As a mirascope it’s not much good either..

Q

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