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Parabolic lens

Arayan

Arayan

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regalis said:
Thanks for the pictures!
It looks beefier in the center with the parabolic lens..
Sorry to bother you, but do you have a second pair of goggles to take pictures with?
Click to expand...
No problem :) and yes I have another pair of goggles for this wavelength but they have low VLT... BTW I'll try...

regalis said:
Btw.: The flare on the top left is due to not 100% perfect alignment, right?
Click to expand...
Yes, the lens holder is a bit arranged and it is not easy to align the beam with few time :p
 





regalis

regalis

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For a few pictures the low VLT should be no problem i think..but don't fry your cam! :thinking:
Maybe wait till someone confirms this :D

The alignment is wonderful..no problem at all!
I just wanted to be sure it is the alignment and not some strange artefacts in the lens ;)
 
Arayan

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regalis said:
I just wanted to be sure it is the alignment and not some strange artefacts in the lens ;)
Click to expand...

no, no only reflections due to the alignment :D

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bobhaha

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Can you place the safety glasses over the lens of the camera so we can see the beam profile?

It looks great so far! Keep up the good work!
 
regalis

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Absolute great work!
The spot looks realy nice and round...if the beamprofile looks the same this lens will be perfect for handheld beamcorrection! :wave:
 
Arayan

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bobhaha said:
Can you place the safety glasses over the lens of the camera so we can see the beam profile?

It looks great so far! Keep up the good work!
Click to expand...

:thanks: and yes, as I said few posts ago, this will be the next step :)
 
Arayan

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I tried to take the pics with the safety glasses over the camera...unfortunately (in this case) the filters have OD>7.

Without the parabolic lens
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With the parabolic lens
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regalis

regalis

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Hey thanks for the pics of the spot! :)
What do you think, is the beamprofile much better with the parabolic lens?
It looks like but i can't tell for sure..(Unfortunately are the spots in the pictures pretty small.. :()

But again thanks for your effort to help determine the usability of these lenses :beer:
+rep when i allowed to ;)
 
Arayan

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regalis said:
Hey thanks for the pics of the spot! :)
What do you think, is the beamprofile much better with the parabolic lens?
It looks like but i can't tell for sure..(Unfortunately are the spots in the pictures pretty small.. :()

But again thanks for your effort to help determine the usability of these lenses :beer:
+rep when i allowed to ;)
Click to expand...

I honestly don't know, the spot looks better with the lens, but around it I can see some reflections with certain loss of power... I don't know what to advise, BTW thanks for the Rep :)
 
Ash

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How much power loss through this lens? Have you metered the laser after passing it through the lens?
 
Arayan

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I haven't measured the variation in power... next step :D

One question though: Do you know which lens you have?
Click to expand...

This :)
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regalis

regalis

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Thanks :)
I found something strange...this is the only lens with a coating:
9tppxj.png
 
Arayan

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Strange, but I'm not 100% sure that my lens is 441. No specifications on the case :thinking:
 
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