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Old 02-07-2017, 02:48 PM #1
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Default Best focal point.

Can a basic glass magnifying glass combine 4 laser to one point safely? I don't want any deflection, reflection, refraction.

And tips on getting the best lense of high quality grade of glass magnifying ?


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Old 02-07-2017, 02:57 PM #2
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Default Re: Best focal point.

Quote:
Originally Posted by Rachel View Post
I don't want any deflection, reflection, refraction.

Well then it won't work, seeing as lenses work by refracting light. Not to mention all optics will reflect some of the light entering them...




But yes, in all seriousness ... it can be done, but maybe not the way you're thinking. What are you trying to achieve? How are you planning to go about it? I suggest you read about some basic optics terminology, maybe look at an online introduction to optics.

Safety is going to be up to you to implement...

Take a look at this, is this similar to what you want to achieve? https://www.youtube.com/watch?v=IzUoe-9bKa0
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Last edited by diachi; 02-07-2017 at 03:00 PM.
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Old 02-07-2017, 03:01 PM #3
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Default Re: Best focal point.

Quote:
Originally Posted by diachi View Post
Well then it won't work, seeing as lenses work by refracting light. Not to mention all optics will reflect some of the light entering them...
What diachi says---you can't avoid all properties of optics and still use optics LOL

Quote:
Originally Posted by Rachel View Post
Can a basic glass magnifying glass combine 4 laser to one point safely? I don't want any deflection, reflection,refraction.
And tips on getting the best lense of high quality grade of glass magnifying ?
No. You can not combine the 4 laser beams. Lasers only work that way in imagination/an imaginary world. See: Reference Guide: How to Combine Lasers

The best you can do is focus all 4 individually onto a single focal point and that is the only point where there will be combined output power power at a single point or combine 2 at a time with PBS cubes reducing the number of beams to 2 then aiming them and focusing them a simgle focal point.

Last edited by Encap; 02-07-2017 at 04:09 PM.
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Old 02-07-2017, 03:11 PM #4
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Default Re: Best focal point.

Quote:
Originally Posted by Encap View Post
The best you can do is focus all 4 individually onto a single focal point and that is the only point where there will be combined output power power at a single point.

I thought that's what OP was asking about...?

I agree OP - if you want to combine them into a single beam that's not the way to go about it.

You can focus them all to roughly the same spot with a lens, but even that isn't ideal. You'd get better results by combining and then focusing.
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Old 02-07-2017, 03:23 PM #5
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Default Re: Best focal point.

Quote:
Originally Posted by diachi View Post
I thought that's what OP was asking about...?

I agree OP - if you want to combine them into a single beam that's not the way to go about it.

You can focus them all to roughly the same spot with a lens, but even that isn't ideal. You'd get better results by combining and then focusing.
She did say "combine", and I didn't know if she meant beams or dots--could be either--so answered about combining beams and about focusing 4 individual dots on a single focal point.

She could use 2 PBS to reduce to 2 beams then a single PBS cube t get one beam and then focus that onto a single focal point.

Not sure what she wants to accomplish/do??

Last edited by Encap; 02-07-2017 at 03:27 PM.
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Old 02-07-2017, 03:37 PM #6
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Default Re: Best focal point.

Quote:
Originally Posted by Encap View Post

She could use 2 PBS to reduce to 2 beams then a single PBS cube t get one beam and then focus that onto a single focal point.

No she couldn't, that isn't how PBS cubes work, the last PBS would split the two beams you've already combined back into individual beams and you'd be exactly where you started before the last PBS cube.
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Old 02-07-2017, 03:44 PM #7
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Default Re: Best focal point.

Quote:
Originally Posted by diachi View Post
No she couldn't, that isn't how PBS cubes work, the last PBS would split the two beams you've already combined back into individual beams and you'd be exactly where you started before the last PBS cube.
Oops you are 100% right---not thinking-brain fog -- am in the middle of 3 other things at the same time. lol

Best if she can say what it is she wants to accomplish. Whatever it is it is probably not as easily done in the real world as in imagination.

Last edited by Encap; 02-07-2017 at 03:48 PM.
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Old 02-07-2017, 03:52 PM #8
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Default Re: Best focal point.

Quote:
Originally Posted by Encap View Post
Oops you are 100% right---not thinking-brain fog -- am in the middle of 3 other things at the same time. lol
No worries, I know how it goes!

Quote:
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Best if she can say what it is she wants to accomplish. Whatever it is it is probably not as easily done in the real world as in imagination.
Agreed!
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Old 02-07-2017, 04:08 PM #9
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Default Re: Best focal point.

Hi all thanks you for ur quick to help

I want to achieve what Diachi linked me with styropyros 200W laser principle. Not 200W's though..

Will a normal household magnifying glass work? Or do I need something offline abit more purer grade. Thanks
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Old 02-07-2017, 04:21 PM #10
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Default Re: Best focal point.

Quote:
Originally Posted by Rachel View Post
Hi all thanks you for ur quick to help

I want to achieve what Diachi linked me with styropyros 200W laser principle. Not 200W's though..

Will a normal household magnifying glass work? Or do I need something offline abit more purer grade. Thanks

Why are you trying to do this? Do you just want to burn things?
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Old 02-07-2017, 04:45 PM #11
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Default Re: Best focal point.

Quote:
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Why are you trying to do this? Do you just want to burn things?
Yea, just burning things
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Old 02-08-2017, 11:49 AM #12
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Default Re: Best focal point.

Any help still ??
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