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Old 03-24-2012, 04:19 PM #1
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Default Aspherical Lenses for 350-700nm Laser diodes

Hi guys!

For sale are aspherical lenses for red and blue laser diodes. They are suitable for 405nm, 445nm, 635nm, 637nm, 642nm and all other laser diodes in the range of 350-700nm. The lenses are AR coated and offer the lowest losses available for lenses. Compared to O-Like the aspherical lenses offer tighter beam at the aperture and highly increased output power.
The same setup shows a difference of over 260mW in output power by using the aspherical lenses instead of O-Like lenses.
The divergence is 2x0,5mrad at full angle. The lenses are pressed into a brass retainer with an M9x0,5 thread.
This lenses are used for better knife edging, because of the tighter beam.

Beam diameter:

Aspherical lens -> 3,9 x 0,9
O-Like Lens: -> 4,3 x 1,5

Specs:

FL: 4,6mm
NA: 0,53
CA: 4,89mm
CT: 3,1mm
OD: 6mm
AR Coating 300-700nm
Manufacturer: Rochester Precision Optics


The price is 32€ + Shipping (2,5€ to Germany, 5€ EU, 7€ anywhere else)
Attached Thumbnails
Aspherical Lenses for 350-700nm Laser diodes-aspheric-lens-4.jpg   Aspherical Lenses for 350-700nm Laser diodes-aspheric-lens-vs.-o-like-lens-2.jpg   Aspherical Lenses for 350-700nm Laser diodes-aspheric-lens-2.jpg   Aspherical Lenses for 350-700nm Laser diodes-o-like-lens.jpg   Aspherical Lenses for 350-700nm Laser diodes-2.jpg  

Aspherical Lenses for 350-700nm Laser diodes-4.jpg   Aspherical Lenses for 350-700nm Laser diodes-1.jpg   Aspherical Lenses for 350-700nm Laser diodes-3.jpg  



Last edited by lasertack; 03-24-2012 at 04:28 PM.
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Old 03-26-2012, 11:00 AM #2
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Very interesting, but you beam profiles measured are clipped, can you do additional measurements to cover those area's? That would show how the lens clips the beam which is important.
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Old 03-26-2012, 11:42 AM #3
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Hello Bluefan,

I took two pictures of the clipping part but because of the 4mm sensor there are two pictures. One of the upper and one of the bottom side.
As you can see the beam was clipped before entering the lens by the lens retainer. So both sides aren´t "clean". Hope this helps. If you need some other data, please let me know.

Regards

Alex
Attached Thumbnails
Aspherical Lenses for 350-700nm Laser diodes-1_-001.jpg   Aspherical Lenses for 350-700nm Laser diodes-2_-001.jpg   Aspherical Lenses for 350-700nm Laser diodes-3_-001.jpg   Aspherical Lenses for 350-700nm Laser diodes-4_-001.jpg  

Last edited by lasertack; 03-26-2012 at 12:06 PM.
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Old 03-26-2012, 06:53 PM #4
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Lasertack, can you post this instead to the Buy Sell Trade forum, rather than the optics forum. Perhaps ask a mod to move it. It would also help to have somebody incorporate your lenses into a build to test whether these are actually very useful. It may cost you a lens or two, but help to verify the claims.
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Old 03-26-2012, 06:58 PM #5
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Thank you for the tip. Will be done.

Alex
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Old 04-01-2012, 09:03 PM #6
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

I just ordered one of these on ebay from you and just realized you are also on this forum

Im also from germany, so I should get it pretty fast and can compare it to my Aixiz 3 Element Glass Lenses (I like them pretty much, but they have a little bit wing shaped splash) and see how this lenses do in power and beam quality.

I already had a 405-G1 Lens, and did not like it, because for me a clean dot is more important then a little bit of power, so Ill see if this can do better

-madeye
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Old 04-01-2012, 11:29 PM #7
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

What's the URL for purchase ?
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Old 04-01-2012, 11:51 PM #8
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

I found it on ebay, but its more expensive then he offers it here. For his "Offer" you need to wait till tomorrow I guess, its already 2am here .
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Old 04-03-2012, 10:38 PM #9
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

I know its a double post, but since no-one says something here and I have some news...

BUMP!

I got the lens today and tried it out with my 445nm (C6 and Labby):

My C6 was putting out 1023mW with a Aixiz 3 Element Glass Lens, and I got 1325mW with this new lens. The splash was similar to what I have seen with a G1, but I can not compare it directly... I can definitely say that that the dot was smaller then with the G1.

I prepared my Labby (max. output about 1050mW) to exactly 1000mW with glass, and wanted to make some pictures of everything, but then somehow the power had a drop. I opened up and checked the modulation voltage and the current, and looks like 1240 mA only gave about 980mW... So I set it to 1300mA to get again slightly over 1W. This is my oldest Diode (I guess a A130) and since this was the 2nd drop in efficiency Im afraid Its time to get a new one. So i stopped my test for the time being.

So, the only thing I can confirm:

-about 30% over long focal length 3-elements lens
-square like splash like the G1
-smaller dot then 3-element

I think some of the lens gurus here should take a look on it and compare it to the G1 and G2 lenses, it could be worth a try. But imho as long as this lens does not support any focus rings its quite unusable for lasers which do not have a fixed focus.

-madeye
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Old 04-03-2012, 10:48 PM #10
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Is it possible to get the bare lens out and put it in a normal 3-element glass barrel ?
I assume it will need a spacer when it fits.
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Old 04-03-2012, 11:14 PM #11
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Quote:
Originally Posted by Blord View Post
Is it possible to get the bare lens out and put it in a normal 3-element glass barrel ?
I assume it will need a spacer when it fits.
Well that's basically what was done with the G-1's and G-2's. Same threading barrel with single element instead and a retaining ring.
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Old 04-04-2012, 08:56 AM #12
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Hi madeye!

Thank you for being first customer on LP forum.

@Blord

At this time we do not offer the O-Like metal retainer, because we were asked for the smallest retainer possible several hundred times.
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Old 04-04-2012, 09:20 AM #13
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Quote:
Originally Posted by rhd View Post
What's the URL for purchase ?
@RHD

you can just PM me and order.
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Old 04-12-2014, 07:59 AM #14
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Quote:
Originally Posted by lasertack View Post
Hi guys!

For sale are aspherical lenses for red and blue laser diodes. They are suitable for 405nm, 445nm, 635nm, 637nm, 642nm and all other laser diodes in the range of 350-700nm. The lenses are AR coated and offer the lowest losses available for lenses. Compared to O-Like the aspherical lenses offer tighter beam at the aperture and highly increased output power.
The same setup shows a difference of over 260mW in output power by using the aspherical lenses instead of O-Like lenses.
The divergence is 2x0,5mrad at full angle. The lenses are pressed into a brass retainer with an M9x0,5 thread.
This lenses are used for better knife edging, because of the tighter beam.

Beam diameter:

Aspherical lens -> 3,9 x 0,9
O-Like Lens: -> 4,3 x 1,5

Specs:

FL: 4,6mm
NA: 0,53
CA: 4,89mm
CT: 3,1mm
OD: 6mm
AR Coating 300-700nm
Manufacturer: Rochester Precision Optics


The price is 32€ + Shipping (2,5€ to Germany, 5€ EU, 7€ anywhere else)
Hi, I need aspherical lens for 915nm wavelength, OD from 15 to 20mm. I want to focus light from optical fibre 0,22NA.
Do you have something alike for sell?

Last edited by zhivko; 04-12-2014 at 07:59 AM.
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Old 04-12-2014, 04:48 PM #15
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Oh my. First off, a simple google search would suffice. Second off, the last post in this thread was 2 years ago. Look and think before you post.
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Old 04-12-2014, 04:51 PM #16
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Default Re: Aspherical Lenses for 350-700nm Laser diodes

Quote:
Originally Posted by crazyspaz View Post
Oh my. First off, a simple google search would suffice. Second off, the last post in this thread was 2 years ago. Look and think before you post.
I thought you could still direct me to somebody that has those lenses.
Thanks and sory for disturbance.

Regards...
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