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#1 Re: Help Me ! » The perfect parabolic reflector?? » 2016-12-01 10:17:52
If you would like to throw in som more variables in this, I belive it would make me feel more dizzy.... lol 
Feel free: www.desmos.com/calculator/12vky2fcgl
#2 Re: Help Me ! » The perfect parabolic reflector?? » 2016-12-01 10:07:10
Bob, what if the LED that will be used in this flashlight has an beam angle of 115 degrees?
In my "eyes" that would not be an efficient LED to us because of that beam angle, it sure would be a deep reflector to catch the light from it? If we would like to have as less "spill" as impossible....
Am I correct?
MF.
#3 Re: Help Me ! » The perfect parabolic reflector?? » 2016-12-01 08:19:35
What's your view on post #1768 and 1769 at page 59 then?
I do not have one. Enderman's work in #1767 which is accurate, is about as far as I can understand.
But I do have an interest in your work. I hike alot and sometimes out of necessity those hikes are in the dark. To a predator, night is the equivalent to dusk for a human. Meaning he can see pretty well. I am totally blind in that environment so a good flashlight is mandatory.
You are very welcome to join our community!
Morten
#4 Re: Help Me ! » The perfect parabolic reflector?? » 2016-12-01 07:49:28
Bob, I`d like to thank you alot for your time and help! 
I`ll link this forum tread in our forum, so the others can see your work/tips/help.
Much appreciated!
Best regards.
Morten Fredriksen
#5 Re: Help Me ! » The perfect parabolic reflector?? » 2016-12-01 03:10:24
Thanks for your answer Bob!
So in this equation/diagram I see that the measures in our flashlight is a bit of..
If we (as for an easily equation) devide the diameter on the hight, 120mm / 112mm, we get 1,0714285714
But that will not be the answer in your diagram?
If I just take a raw measure right from my computer screen, I got (from diagram) a diameter of 114mm, and a hight from F is 88mm = 114/88 = 1,2954545455
So we are slightly of from this diagram in our reflector...
If we do this then:
120/x=1,2954545455
The x will then be = 92,63161795
Can I copy your post Bob, over to our forum?
Or do you want to join our forum and point out this equation/diagram??
The last suggestion would be MUCH-MUCH appreciated!!
Morten.
#6 Re: Help Me ! » The perfect parabolic reflector?? » 2016-11-30 22:01:42
hi Morten Fredriksen
Welcome to the forum.
And your English is very good!
Bob
** I think I can produce a coordinate geometry proof of this if you want.
Thank you for welcoming me!
As for the English: When not in use, we forget..but now the knowledge starring to come out from the blur..
(Haven't used my English since high school..)
But a fast learner, and the ability to "adapt"...it can't be worse..
If you are interested in produce that coordinate geometry, it'll be much appreciated!
But I'll throw in an sub-question for that matter: The work of *Endermans* work is not far away from the best equation for this subject?
Thanks in advance!
Morten
#7 Re: Help Me ! » The perfect parabolic reflector?? » 2016-11-30 20:05:05
What's your view on post #1768 and 1769 at page 59 then?
#8 Re: Help Me ! » The perfect parabolic reflector?? » 2016-11-30 19:42:08
Hi;
Why does post #5 not settle the question? Looks like a great use of EM. I have not checked it because I just want to marvel at such sublime beauty and understanding for awhile. First, I must wipe away the tears of joy.
Of course, he did not use the correct tool for the job but that can be fixed easily.
I knew some of you would be laughing..but this doesn't answer my question.
And why I ask is because of all the back and forth with the design of the reflector, some even had the idea of cutting his flashlight (Trunite TN42, who has the record in throw for the moment. 1350meter) reflector i half, and just up scale it to ours measurements.. lol
And then you have this program mentioned in post #5, but it seem like people have not enough knowledge of this program to get what we want...
Maybe some people in this forum has the right tools, or knowledge of this subject??
Looking forward to get the "correct" answer from one of you!
#9 Help Me ! » The perfect parabolic reflector?? » 2016-11-30 12:04:02
- Morten Fredriksen
- Replies: 15
Hello!
First of all:
You have to exuse my english, due to bad skills..but I`m trying.
I see that you guys are into math, for sure, and I have a question for you.
We (Budgetlightforum) are trying to build a super-thrower of a LED flashlight, but in a reasonable handheld size (Tread: www.budgetlightforum.com/node/50303 ).
And we are gathering info about reflectors, and the shape of it..
And here is my question: Which form will be the best shape for this reflector??
The inner diameter, on the outer end is 120mm.
And some my forum have their opinion of 112mm for the depth of it..will be the best.. (But I don`t know their source for that opinion)
Do you have the mathematic answer for my question?
I appreciate for your time to read this, and I even better appreciate an answer from you, if you are willing to. 
Bets regard!
Morten Fredriksen
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