The OptoFire Searchlight | BEAMSHOTS on page 3 | record-breaking aspheric LED thrower

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SubSailorVet
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*WOW!!!* Very impressive. You engineered that build like a professional scientist. Man you did very well. You should be working for a big flashlight or led manufacturers. By the way, if that is your home you took the picture from, you have a lovely home. Where is it that you live? Very nice place. I'm very impressed with everything you did here. As we say in the US Navy submarine service " Bravo Zulu"!! Thumbs Up

Best regards,

Matthew

 

 

 

 

 

Enderman
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SubSailorVet wrote:

WOW!!! Very impressive. You engineered that build like a professional scientist. Man you did very well. You should be working for a big flashlight or led manufacturers. By the way, if that is your home you took the picture from, you have a lovely home. Where is it that you live? Very nice place. I’m very impressed with everything you did here. As we say in the US Navy submarine service “ Bravo Zulu”!! Thumbs Up


Thanks Silly I don’t think most normal flashlight manufacturers are interested in extreme stuff like this, but maybe for military or search and rescue applications Smile
Maybe that’s what I might do as a job when I finish university, who knows.

Also, unfortunately that isn’t my home, just a place in Spain I’m on vacation at. It is very nice.

pscal
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I love this build. It is very well engineered and executed. Great job, and thanks for sharing! I’ve also had good luck using hot glue to affix a wavien collar.

Enderman
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pscal wrote:
I love this build. It is very well engineered and executed. Great job, and thanks for sharing! I’ve also had good luck using hot glue to affix a wavien collar.

Thank you! Smile
Yeah, hot glue works excellent as long as it doesn’t get hot enough to soften.
With that huge heatsink and lots of airflow it is very solid even when on max power Big Smile
WillyD
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I love this build. Excellent job. I zoomed in on the boat pics expecting some guy to be holding up the middle finger at you Big Smile

Enderman
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WillyD wrote:
I love this build. Excellent job. I zoomed in on the boat pics expecting some guy to be holding up the middle finger at you Big Smile

Hahaha thanks Big Smile
I do my best to not shine my lights at buildings or people Silly or else I will get in trouble fast that way.

The other day when I went out for another night test there was a police officer watching me for a while, but he never came to say anything to me.
I guess he saw I wasn’t pointing it at people, just the sky and ocean, so it was fine.

Enderman
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A few more pictures…

And the standard 1000m beamshsots I do to the antenna at the top of a mountain:

Smile

Theodore41
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Shouldn’t you put some kind of light shield in the front side of the tube?

Enderman
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Theodore41 wrote:
Shouldn’t you put some kind of light shield in the front side of the tube?

So that the PVC tube doesn’t get lit up from the inside?
Yeah I could, but that would prevent me from sliding the LED assembly up and down the tube for focusing.
There are also the holes on the bottom side of the front for air exhaust, which I can’t cover up.

I didn’t really feel it was a problem, so I just left it as is.
This is the stray light that passes through the wavien collar without getting reflected back to the LED.
If it was light coming directly from the LED it would be much brighter.
I did line the inside of the head section with blackout paper, since some LED light does hit there directly with this longer focal length lens.

hIKARInoob
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Nice pics! Thumbs Up Beer

Enderman
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hIKARInoob wrote:
Nice pics! Thumbs Up Beer

Thanks Smile
DarthTader
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Wow, great pictures and a fun read. Great job on the build!

RPI
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thanks for sharing this project, very nice build

Enderman
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DarthTader wrote:
Wow, great pictures and a fun read. Great job on the build!
RPI wrote:
thanks for sharing this project, very nice build

Thank you! Smile

Barkuti
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So you are doing a reflector build for your next torch. What if you make it so you put an aspheric focusing just the hotspot opening? @#$% with the spill… 

Should net you some gain. 

 

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Barkuti wrote:
So you are doing a reflector build for your next torch. What if you make it so you put an aspheric focusing just the hotspot opening? @#$% with the spill… 

Should net you some gain. 

In a reflector-based light, the hotspot comes from the light which goes sideways into the reflector, and the spill comes from the part which goes forward directly out the lens. This is exactly backward from how an aspheric thrower works, so they don’t really combine well.

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As far as I do understand, ToyKeeper, the reflector hotspot is a combination of the sideways carefully bounced at the right angle emitter output and the corresponding narrow central angle emission (the longer the throw the narrower this part is, doesn't it?). However I can see how increasingly difficult to manufacture, costful and shape emitter optimized a reflector is to be for maximum performance.

I'm no expert in optics, Enderman may shed some additional light for sure (like how big and how far the lens would be required to sit). The question is: What'$ th€ nam€ of all of that g€ar and $tuff? 

 

Cheers 

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Enderman
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Barkuti wrote:
So you are doing a reflector build for your next torch. What if you make it so you put an aspheric focusing just the hotspot opening? @#$% with the spill…

Smile
It will be a reflector light but there will be 0 spill, without needing to use lenses or anything else.
ToyKeeper
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Enderman wrote:
Smile It will be a reflector light but there will be 0 spill, without needing to use lenses or anything else.

Recoil thrower? Inverse wavien? Other? Secret recipe?

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Enderman wrote:
Barkuti wrote:
So you are doing a reflector build for your next torch. What if you make it so you put an aspheric focusing just the hotspot opening? @#$% with the spill…

Smile
It will be a reflector light but there will be 0 spill, without needing to use lenses or anything else.

Recoil?
ADDED: minute too late Wink
Enderman
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Agro wrote:
Recoil? ADDED: minute too late Wink
ToyKeeper wrote:
Recoil thrower?

Yes! Smile
I won’t spoil all the other juicy details though, all I’ll say is that the mirror is gonna cost half a grand xD

Jerommel
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Enderman wrote:
Agro wrote:
Recoil? ADDED: minute too late Wink
ToyKeeper wrote:
Recoil thrower?

Yes! Smile
I won’t spoil all the other juicy details though, all I’ll say is that the mirror is gonna cost half a grand xD


Hey, you’re stealing my idea ! Shocked Wink
Well, i guess you have the funds for a reflector, and i don’t…
I’m obviously very interested in that project, can’t wait to see more.

On another note:
This aspheric light, am i correct in noticing you blow the cooling air through the Wavien collar?
Aren’t you afraid the surface will get dirty and / or oxidised?

Enderman
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Jerommel wrote:

Hey, you’re stealing my idea ! Shocked Wink
Well, i guess you have the funds for a reflector, and i don’t…
I’m obviously very interested in that project, can’t wait to see more.

On another note:
This aspheric light, am i correct in noticing you blow the cooling air through the Wavien collar?
Aren’t you afraid the surface will get dirty and / or oxidised?


I came up with the idea about 3 years ago, back when I didn’t know anything about flashlight forums.
I got pretty excited when I saw the Uber thrower thread with people that had the same idea as me Smile
Unfortunately it has already been patented, but I guess that means I don’t need to worry about people stealing my design…or pay fees every year.
Until now I’ve been sticking to lenses because I thought they were better, but I’m kinda hitting a wall, and the chromatic aberration I discovered in this thread makes me not like lenses as much anymore.
.
Yes, most of the airflow goes through the collar.
Thanks to the mesh at the back of the flashlight I don’t have to worry about large particles or insects getting inside the light or on the collar.
Some dust does settle, but very little since it is a very smooth surface and almost nothing sticks to it, the air just pushes right past.
Not really worried about it oxidizing, cold mirror coatings are pretty resistant to oxygen environments.
The reason I wanted lots of air flowing past the collar is to keep it from fogging up in high humidity environments, and water on it would almost certainly damage the coating.
Jerommel
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How can one patent a parabolic mirror reflecting light in one direction?
That’s silly..
Yeah, of course it wasn’t ‘my idea’, i think it must have been invented discovered within a week of the invention of the ‘open air arc’ electrical light (that’s on 200+ Volts with 2 carbon rods and a big shunt resistor that can heat up a room…)

But i.m.o. an LED begs for a recoil light, since it emits light only one way, in a 120° cone, more or less.
I assume you’ll be using a beam or cross made of heat pipes?
Looking forward to your reports.

Yeah, the rainbow / prism effect is always there with an aspheric.
This is why i was wondering about monochromatic light, like 580nm yellow.
I guess you could use a multi lens set up like cameras do, to avoid it? Complex and expensive of course..

Enderman
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Jerommel wrote:
How can one patent a parabolic mirror reflecting light in one direction?
That’s silly..
Yeah, of course it wasn’t ‘my idea’, i think it must have been invented discovered within a week of the invention of the ‘open air arc’ electrical light (that’s on 200+ Volts with 2 carbon rods and a big shunt resistor that can heat up a room…)

But i.m.o. an LED begs for a recoil light, since it emits light only one way, in a 120° cone, more or less.
I assume you’ll be using a beam or cross made of heat pipes?
Looking forward to your reports.

Yeah, the rainbow / prism effect is always there with an aspheric.
This is why i was wondering about monochromatic light, like 580nm yellow.
I guess you could use a multi lens set up like cameras do, to avoid it? Complex and expensive of course..


https://www.google.ca/patents/US20130094193?dq=led+parabolic+sky+beam
There was also another one that I can’t find again right now.
It’s not just a reflector that is patented, but the invention of a reverse facing LED + parabolic reflector + cooling and housing design.
It’s basically an entire product.

I’ll talk about LED cooling when I start the build log.
First I’m applying for funding from my university.

Achromatic lenses are extremely expensive, and would need to be custom made even for the 120mm size of the optofire.
I want to go bigger, but lenses about 6-12” in diameter would simply be impossible to either produce or afford.
Also, there will always be some chromatic aberration and spherical aberration no matter how precise the aspheric lenses are.
Since a parabola is an easily defined mathematical shape it is a lot easier to manufacture reliably and more ideal for light collimation Smile

Jerommel
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Hmmm…
It’s just a couple of ancient inventions combined i.m.h.o.
Okay, an LED is not ancient..

Can you tell us what size reflector we’re talking about?
Should be pretty large for ‘half a grand’ Big Smile

Enderman
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Jerommel wrote:
Hmmm…
It’s just a couple of ancient inventions combined i.m.h.o.
Okay, an LED is not ancient..

Can you tell us what size reflector we’re talking about?
Should be pretty large for ‘half a grand’ Big Smile


Most patents are really just that, a combination of different technologies.
There are different types of patents, and it’s perfectly fine to take several other things and combine them into a new device that does something Smile

Reflector will be 11” diameter.
I wanted to go with 12” for even more lux but there are several logistical issues which I will probably just avoid completely by going with 11.
According to my calculations 11” should be enough to pass the maxabeam, which is my upcoming goal Smile

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Enderman wrote:

Smile
It will be a reflector light but there will be 0 spill, without needing to use lenses or anything else.
I only understand bits & pieces of the technical talk…..
…… BUT —— I do understand “0 spill”. Big Smile .. Thumbs Up

That sounds like my dream light Enderman…… Smile

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Jerommel
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11” Shocked Cool
Not quite portable then.. Big Smile

Agro
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Enderman wrote:
it’s perfectly fine to take several other things and combine them into a new device that does something Smile

I totally agree.
But I don’t think it’s fine to prevent others from doing so because they didn’t make it to the patent office first.

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