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Old 12-16-2013, 01:37 PM #33
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Default Re: Question on ebay laser pens

Andrew1,

Check out this link. It shows you how to make the ebay pens focusable. The top link in the first post directs you to an ebay seller that has the "higher powered" pens:

How to make your way overspec $5 pen focusable + new bonus section added


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Old 12-16-2013, 04:36 PM #34
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Default Re: Question on ebay laser pens

there will be NO ir filter to remove from a cheap ebay pen. and some can have as much as 70% of output being ir. mW per mW 405nm will burn better, more energetic photons you know.
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kryton groove gitd 445
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Osram pl520 in an sh-032 host
Skylaser HL532-300
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Rayfoss 650 150mW
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Old 12-17-2013, 01:46 AM #35
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Default Re: Question on ebay laser pens

Quote:
Originally Posted by cheech226 View Post
there will be NO ir filter to remove from a cheap ebay pen. and some can have as much as 70% of output being ir. mW per mW 405nm will burn better, more energetic photons you know.
so what you're saying is that lasers WITHOUT an IR filter tend to have a greater burning capability?
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Old 12-17-2013, 02:27 AM #36
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Default Re: Question on ebay laser pens

Quote:
Originally Posted by Andrew1 View Post
so what you're saying is that lasers WITHOUT an IR filter tend to have a greater burning capability?
Yes

Without an IR filter more light is allowed to pass through the aperture which increases the output.

For example:

532nm(W/Filter)
1064nm---808nm---532nm(only 532nm light)

532nm(Without Filter)
1064nm----808nm---532nm(532nm+IR Light outputted)
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515nm: Generic "Laser Pointer-515P-10" Pen 12mW
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450nm: Z-Bolt BLP-5-S Pointer 6mW
405nm: Generic "Laser Pointer" Pen 35mW



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Old 12-17-2013, 08:00 PM #37
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Default Re: Question on ebay laser pens

well....yes there is more total radiation coming out. it's just that some or even most of it is invisible - and that is a Bad thing.
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i have fond memories of owning
10 hene tubes 2 argon ion units and lots of diode and dpss lasers in these wavelengths:
405,445,450,458,473,488,532,543,594,612,632,635,650,685,780
I'm rebuilding my collection:
Skyray 405 12x
kryton groove gitd 445
B&W Tek 473 lab laser
JDSU 2214-40 multiline argon ion
Osram pl520 in an sh-032 host
Skylaser HL532-300
543 HeNe
632 HeNe x3
Opnext 638 single mode in c6 host
Rayfoss 650 150mW
Laserbee II Deluxe lpm w/ Peregrine
Laissez les bons temps rouler!
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Old 12-17-2013, 10:13 PM #38
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Default Re: Question on ebay laser pens

Well, if you want to burn things on the cheap, probably the best bang for your buck would be a red
diode extracted from a DVD burner sled. They are more difficult to find and can cost more when found,
but if you can get a "dead" 12X Blu-Ray burner drive it will give you three really nice diodes (or possibly
2 diodes, one of which will be a dual). That would be the best option by far, as you might be able to
squeeze upwards of 900mW out of the violent diode, depending on how you play it.

Now don't forget your safety glasses. For a 660nm red, there is no substitute for the Eagle Pair sold by
Survival Laser that doesn't cost significantly more. None of the other "cheap" safety glasses have a
good chance of working, even if they claim to be Eagle Pair, as there are a lot of fakes out there.
Otherwise if you don't take our advice, then, well, just keep reading down to the bottom of my sig.
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