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Old 04-28-2010, 08:45 PM #1
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Default green laser, IR warning

I just bought some green lasers on eBay for $1 each.
I bought them for a projector I am making
wile examining them I noticed there was no IR filter
so I filtered out the green from the beam and using a IR detector card I noticed there was a lot of Ir left
Even with the green filter out I could feel heat from from the I on mi lip


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Old 04-28-2010, 08:57 PM #2
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Default Re: green laser, IR warning

Well with spending only a buck on a laser I guess you can't complain too much. If it is that important I would get a IR filter but if you are using them in a scanner I wouldn't worry about it. The IR is nowhere near as culminated as the green and will be diffused enough to not cause too much trouble especially using them in a scanner.
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Old 04-28-2010, 08:59 PM #3
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Default Re: green laser, IR warning

Quote:
Originally Posted by lazerman121 View Post
I just bought some green lasers on eBay for $1 each.
I bought them for a projector I am making
wile examining them I noticed there was no IR filter
so I filtered out the green from the beam and using a IR detector card I noticed there was a lot of Ir left
Even with the green filter out I could feel heat from from the I on mi lip
Are you sure? It would require a LOT of IR for you to feel it on your lip... I would estimate at least 250mW with decent collimation.
808nm is not absorbed by skin as much as 532nm or 405nm.

You can estimate how much power the pump is outputting by measuring the current input.
What is the advertised power level of these modules?
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Old 04-28-2010, 10:34 PM #4
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Default Re: green laser, IR warning

Quote:
Originally Posted by RA_pierce View Post
Are you sure? It would require a LOT of IR for you to feel it on your lip... I would estimate at least 250mW with decent collimation.
808nm is not absorbed by skin as much as 532nm or 405nm.

You can estimate how much power the pump is outputting by measuring the current input.
What is the advertised power level of these modules?
on a part of your lower lip is a sensitive spot where you can feel heat from 10 mW of power

and I have a couple of filters and already glued one on
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488nm 5mW Novalux Protera DPSS Laboratory Unit Review
515nm 20mW module
532nm 200mW Suwtech Lab laser
532nm 100mW Suwtech Lab laser

543.5nm .5mW Research Electro-optics Inc Helium Neon
561nm 4.98mW CNI GLP OEM module Review
593.5nm 100mW CNI Lab Dead driver
604nm LHOR-0150 2nd line
612nm 2.1mW LHOR-0150
632.8nm Melles Griot Bare Tube (05-LHR-004-347)
632.8nm .4mW Spectra Physics 155 HeNe
Sold
635nm 15mW Module
650nm 5mW red
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Old 04-29-2010, 07:22 PM #5
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Default Re: green laser, IR warning

Quote:
Originally Posted by lazerman121 View Post
I just bought some green lasers on eBay for $1 each.
Source?

Quote:
Originally Posted by lazerman121 View Post
on a part of your lower lip is a sensitive spot where you can feel heat from 10 mW of power
Source?

Quote:
Originally Posted by lazerman121 View Post
Even with the green filter out I could feel heat from from the I on mi lip
Placebo?
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Old 04-30-2010, 09:27 PM #6
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Default Re: green laser, IR warning

New idea for a power meter...
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Old 05-01-2010, 02:25 AM #7
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Default Re: green laser, IR warning

Indeed. Tough to calibrate though.
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