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Old 01-24-2012, 07:46 PM #49
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Default Re: FS: CNI GLP 593.5nm (594) pointer, rated for 3-5mW.

Quote:
Originally Posted by lazeristasUVISIR View Post
As you don't know actual absorption of your filter at 594nm, you need to pass a beam (now only 594 if the goggles really absorb 100%@ 808, 1064, and 1342) one more time and measure power again to get an idea how much power you lost in the goggles.

All this hassle if you really want to know the power and you have nothing else to do
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Originally Posted by plexus View Post
Aren't we talking about a 5-10mw laser? your meter is not going to get an accurate reading of IR unless you have a meter designed specifically for low powers. i have yet to see a hobbiest LPM that is accurate at low power levels (eg. < 20-50mw). added to that the google technique which is going to make it even less possible. you also have to know the absorption characteristics of the filter in order to accurately determine IR. you need a lab quality filter with a wavelength plot of its transmission characteristics.
Yep, I'm inclined to agree with Plexus. There's so much *wiggle* or *margin of error* in that method, that I just do see it being meaningfully worth the time. Remember, I still run into the issue of not having the ability to measure such low powers, even IF I cut out the IR.

The only way to measure the power of this properly would be to put a filter in front of it that blocked only IR, and then use a power meter properly suited to lower power lasers.

Whether it's 5mW or 1mw, this will find a home at $200. So I'm not terribly concerned with getting the precise power (though I appreciate the intellectual desire to solve challenges in creative ways!)


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SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

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Old 01-24-2012, 07:54 PM #50
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Default Re: FS: CNI GLP 593.5nm (594) pointer, rated for 3-5mW.

^^

Even if you filtered out the IR the power is so low that the margin of error is going to make the measurement meaningless. i think the best way to approach this laser as a prospective buyer is to take it for what it is: a very nice, beautiful wavelength, working, from a trusted manufacturer. $200 is a good deal.
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650nm: 5mw pointer (early)
250mw O-like OL-CR-250 (170mw)

635nm: 500mw pointer rhd build 18650 SH-032 (650mw)
500mw O-like lab

532nm: 100mw SH032 DX module pointer (120mw)
150mw tri Lights Lab (260mw)
600mw Wicked Lasers Spyder III Krypton first gen

473nm 50mw Ultra Lasers Labby (over spec 160mw)
488nm 80mw Multi-line AL60X Argon
445nm: 1.3W Flaminpyro SS (1350mw) 1.4W
Wannaburn Super-small SS (1430mw)
2.9W RDTech 9mm SH032

450nm: 150mw OSRAM single mode 450nm lab
200mw Lazerer OSRAM single mode 450nm

405nm: 100mw WL E3 (85mw)
500mw 405nm O-like lab
500mw 405nm Jayrob SS (560mw)

3x Shinp 650/532nm/445nm 250+100+300mw Light show (modified to include the 445)

numbers in () are average run for 1 min IR filtered
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Old 01-30-2012, 05:43 PM #51
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Default Re: FS: CNI GLP 593.5nm (594) pointer, rated for 3-5mW.

It's either this or the ninja for me rhd I'm still waiting on my paycheck for the last 2 weeks >
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Old 01-30-2012, 06:27 PM #52
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Default Re: FS: CNI GLP 593.5nm (594) pointer, rated for 3-5mW.

This guy is sold (sort of)
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CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

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