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Old 11-29-2008, 05:16 AM #1
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Default 808 and 1064nm blocking filters -- good deal?

I see that Snoctony offers a 10 lot of IR filters on ebay...item number 130269005361. Does anybody more well versed in optics think this is a decent deal for the money? Or can they be had much cheaper from a U.S. supplier?

I will definitely need more than one in the near future, and I already need one on one of my lasers now.

-Brett


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Old 11-29-2008, 12:06 PM #2
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Default Re: 808 and 1064nm blocking filters -- good deal?

$65.00 for all of them isn't a bad deal, but who would use all of those IR filters?

-Adam
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Old 11-29-2008, 02:02 PM #3
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Default Re: 808 and 1064nm blocking filters -- good deal?

I bought some multi wavelength blocking filters for 808nm and 1064nm...
from this eBayer that was referred to me by a member here on LPF..

[ Link removed ]

Jerry

[EDIT] The above link was removed... as the suggested fiter also blocks 532nm... OOps.. :-[
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Old 11-29-2008, 02:25 PM #4
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Default Re: 808 and 1064nm blocking filters -- good deal?

What are you using that for?

By the looks of the transmission plot, it also blocks 532 green and 473 blue completely. Perhaps its useable in a 671 red dpss, but otherwise i dont see any application?

You might want something like this: http://cgi.ebay.ca/Optical-Filter-69...742.m153.l1262 - though 20% loss is a lot.
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Old 11-29-2008, 03:49 PM #5
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Default Re: 808 and 1064nm blocking filters -- good deal?

Quote:
Originally Posted by Benm
What are you using that for?

By the looks of the transmission plot, it also blocks 532 green and 473 blue completely. Perhaps its useable in a 671 red dpss, but otherwise i dont see any application?

You might want something like this: http://cgi.ebay.ca/Optical-Filter-69...742.m153.l1262 - though 20% loss is a lot.
That Filter looks much better... but I don't know if it blocks 1064nm by the chart.

Thanks for pointing that out... the filter i suggested is useless to block the 532nm's IR since it also blocks
the 532nm...
I was so interested in the 808nm and 1064 end if the chart... that I missed the 532nm blocking curve... :'(

I might grab a couple of those 1/2&quot; dia filters to power test 532nm Lasers to see if IR filters are installed
or not... Thanks for the heads up.. *[smiley=thumbup.gif]

Jerry
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Old 11-29-2008, 04:52 PM #6
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Default Re: 808 and 1064nm blocking filters -- good deal?

Well, we can't be totally sure about 1064, but i reckon it blocks that as well, otherwise they would probably have made the chart bigger.

With most green lasers 1064 is less of a concern anyway, since 532 is obtained with intracavity doubling, and transmission of more than a percent of 1064 from either end of the set would cause the solid state laser to stop functioning.
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Old 11-29-2008, 06:28 PM #7
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Default Re: 808 and 1064nm blocking filters -- good deal?

Quote:
Originally Posted by Diachi
$65.00 for all of them isn't a bad deal, but who would use all of those IR filters?

-Adam
Well the picture on Snoctony's auction shows 100 IR filters, however, it says this auction is only for 10 filters. *I already have one 643nm module (my Aixis 15mw) in need of IR filtering, plus a 50mw on the way from Snoctony, which probably will need it as well. *those filters would be useful for anyone wanting to make a cheap pointer a bit safer. *He claims only 5% loss at 532 for these filters. *

-Brett

*edit* I meant to say 532nm on my AixiZ 15mw, not &quot;643&quot;...don't know where I got that, must have been in a hurry.
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Old 11-29-2008, 07:47 PM #8
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Default Re: 808 and 1064nm blocking filters -- good deal?

diode lasers such as your Aixiz 643?nm module do not requite IR filters. Unless its a green and you made an error.

only DPSS (mainly 532nm, 473nm, 593nm and 671nm, there are others however they are not available to us mortals) lasers require IR filters, as they use an IR pump diode and as a result produce some IR spillage.

Diode lasers (red and BR, in our world) do not produce any IR.
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Old 11-30-2008, 02:22 AM #9
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Default Re: 808 and 1064nm blocking filters -- good deal?

hi all:
i am Lasertec Inc from china. my company provide optical and crystal components for laser application for many years. I am glad serve to member on forum. we supply crystal following:
Laser crystal: Nd:YAG,Nd:YVO4, diffusion bonding crystals for YAG and NdYVO4 ,DPM crystal(Nd:YVO4+ktp)
SHG crystal: KTP, LBO,BBO,etc.
laser mirror : Corner cube,HR mirror, Cavity lense, Xcube, filter,(made of GaF2,BK7,UVFS etc.)
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Old 11-30-2008, 06:09 PM #10
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Default Re: 808 and 1064nm blocking filters -- good deal?

I'm pretty sure Optotronics sells IR filters for $1, I'll have to check to see if that is right though.

Edit: http://www.optotronics.com/proddetail.php?prod=f-0006
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Old 12-01-2008, 08:11 AM #11
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Default Re: 808 and 1064nm blocking filters -- good deal?

Styropyro,

Yes, I checked and they are $0.99! I am definately ordering a few of those for my upcoming projects. Thanks! That's a great price and I'm sure the shipping would be faster than Snoctony.

-Brett
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Old 12-01-2008, 10:49 AM #12
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Default Re: 808 and 1064nm blocking filters -- good deal?

That's really cheap!

But mind you, its not a good filter: blocks only 85% of IR, and by the looks of it, gives a fair loss in the visibly frequencies as well.
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Old 12-02-2008, 12:33 AM #13
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Default Re: 808 and 1064nm blocking filters -- good deal?

Snoctony it is then, or one of the other vendors of this same bg38 material. I'd rather pay more and know I have the best quality.

The issue for me is that I have one 532nm labby and two others on the way now which will not be IR filtered. I would like to add them on for extra protection. I will be using safety goggles when needed however, nevertheless, I want the filters too.

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