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Old 09-23-2011, 12:23 PM #1
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Default Parabolic lens

this morning, I found among my stuff, this nice parabolic lens




I tried to focus a beam from a 445 nm laser (1.2 W) with this lens and the result was a circular dot, rather than square, to the exit. Later I want to make a video to show it better.
I also got a very nice conical side reflections



Attached Thumbnails
Parabolic lens-lp1.jpg   Parabolic lens-lp2.jpg   Parabolic lens-lp3.jpg   Parabolic lens-lp4.jpg   Parabolic lens-lp5.jpg  



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Old 09-23-2011, 02:34 PM #2
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Default Re: Parabolic lens

neat, i haven't seen anything like that before
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Old 09-23-2011, 07:35 PM #3
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Default Re: Parabolic lens

Quote:
Originally Posted by Arayan View Post
this morning, I found among my stuff, this nice parabolic lens
This is what you've got.

Compound Parabolic Concentrators (CPCs) - Edmund Optics
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Old 09-23-2011, 07:43 PM #4
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Default Re: Parabolic lens

Quote:
Originally Posted by steve001 View Post
yes, the case has the label of Edmund optics
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Old 09-25-2011, 10:24 AM #5
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Default Re: Parabolic lens

Is it possible for you to make a picture of the dot? (or do you have only 1 pair of glasses like i do? )
This lens is pretty pricey but would be perfect for the beamcorrection in an handheld

Btw.: nice find and i also have to wait till i can give you the well deserved +rep
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Old 09-26-2011, 05:17 PM #6
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Default Re: Parabolic lens

Usually I just find dead bugs and dust bunnies amongst my stuff... Where do you get stuff that has good things hidden in it?

Nice find, wonder if it could collimate an LED better than the shorter type optics...
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Old 09-26-2011, 05:53 PM #7
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Default Re: Parabolic lens

Quote:
Usually I just find dead bugs and dust bunnies amongst my stuff...
LOL I had simply forgotten to have bought it

Quote:
Is it possible for you to make a picture of the dot?
yes...give me few other days, I'm, unfortunately, very busy at moment ... BTW again
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Old 09-26-2011, 07:41 PM #8
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Default Re: Parabolic lens

No stress
Thanks for considering taking pictures!
I have no money to buy one of these so..no problem with a delay
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Old 09-26-2011, 08:33 PM #9
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Default Re: Parabolic lens

have you measured this lens vs an aixiz glass lens? if so, is there a huge difference?
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Old 09-26-2011, 08:35 PM #10
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Default Re: Parabolic lens

(i hope there is a difference)
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Old 09-26-2011, 09:36 PM #11
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Default Re: Parabolic lens

First: Don't doublepost..this is bad behaviour! (use the "edit"-function)

Second: huh?
This lens is to correct the beamshape not to focus the beam
So you can't "compare" an AixiZ glass lens with this Parabolic lens...
But to fulfill your hopes...there will be a big difference
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Old 09-27-2011, 04:38 AM #12
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Default Re: Parabolic lens

oh sorry for the double post. i was a little tired yesterday evening so i didn't read the whole thread. but thanks for your reply.
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Old 09-27-2011, 05:47 AM #13
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Default Re: Parabolic lens

You are welcome
Nobody knows all the things...but Sam
You know Sam's LaserFAQs? (Sam's Laser FAQ - Preface, Introduction, What is a Laser?, Safety)
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Old 09-27-2011, 06:46 AM #14
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Default Re: Parabolic lens

Looking forward to seeing the dot!
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Old 09-28-2011, 10:54 AM #15
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Default Re: Parabolic lens

Unfortunately yesterday I have not had time to measure the beam diameter, but also with the "naked eye" was visible a reduction of the spot.

With the pointer placed at the same distance.
without the lens


With the lens


Thanks for the interest
Attached Thumbnails
Parabolic lens-s.jpg   Parabolic lens-c.jpg  
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160 mW, 532 nm, Optotronics pen SOLD
Focusable 150 mW, 532 nm
5 mW, 532 nm, Laserglow Anser
2 mW, 594 nm, Laserglow Rigel-2 SOLD
380 mW, 635 nm, the Copperhead by Wolfman Link
170 mW, 650 nm from jeffreythe00 Link
double beam pointer <5 mW, 650 nm ; 532 nm, Z-Bolt
<400 mW (220 mW) 808 nm Armlaser
KW-range 1064 nm pulsed YAG laser "gun" from AnselmoFanZero Link
40W, 10600 nm DIY CO2 laser Link
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Old 09-28-2011, 01:45 PM #16
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Default Re: Parabolic lens

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?
Btw.: The flare on the top left is due to not 100% perfect alignment, right?
As far as i can see the beamshape is nearly perfect round..very cool lens you have!
This is already on my whishlist
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405nm >> 1000mW 501B host from Blord
445nm >> 1200mW AuroraC6 Host from Survivallaser | review
445nm >> 3400mW Dominator Host from Blord
488nm >> 3W Argon-Ion from Aesculap Meditec
514nm >> 3W Argon-Ion from Aesculap Meditec
532nm >> 100mW module without host
660nm >> 300mW Jayrob Chrome pen built by RA_pierce from DJNY

Ophir-Head 20C-A in a 2W LPM from Bluefan - review
Ophir-Nova LPM with Ophir-Head L30A-10mm
Spectrometer Spectra-1 from Kvant (Slovakia)
Kvant ClubMax 3000 RGB Pure Diode White Showlaser with Pangolin Discoscan Lens from Kvant (Germany) | review

You want to see the SurvivalLaser in action? --> Beamshots 445nm + 532nm
You have laser related questions? --> Sam's Laser FAQ
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