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Old 11-05-2010, 11:46 PM #1
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Default Help me find a thread.

Hi all

I'm looking for a thread where it was explained how you can measure the wavelength of a laser by shining it between two razor blades and measuring the distancen between each point the interference generates.

Any idea where is it? I have already used the search.

Thankss


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~100mW 405nm from Erdabyz (L) akshakj <- Died once, working again. vid 1 vid 2(repaired)
~980mW 445nm in Ehgemus RPL style host, thanks to MR. DAGUIN vid
~25mW 532nm (potmoded) from DX (dead now, switch died and repair failed...)not moded vid
~50mW 532nm "star cap" style found in the bus. Yeah, lol.
~6mW 635nm diode laser pic 1 pic 2
~250mW 650nm extracted from 20x DVD burner. <- dead vid 1 vid 2
~130mW 650nm extracted from 16X DVD burner. <$15 to make! LPF thread

~100mW 780mn extracted from 52x CD burner. <- dead cremation vid

My Youtube channel
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Old 11-05-2010, 11:54 PM #2
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Default Re: Help me find a thread.

I'm sorry I couldn't find any reference to two razor blades....
I was just searching spectrometers of late and found this...perhaps some help if not exact.
homemade laser spectrometer.
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HeNe lasers a'plenty.Plus that nice one in the avatar
594nm Melles Griot HeNe
594nm Trius Engineering HeNe
405nm handhelds (diy)
445nm handhelds (diy)
473nm B&W Tek lab style
488nm.40mW Multi-Line Argon Ion laser.....(with thanks to Dave)
515nm Argon Ion laser 40mW
532nm lab style 100mW+handhelds (diy)
543nm Melles Griot HeNe
674nm lab style..500mW
808nm 40W FAP diode array
Kimmon IK4123R-B Helium-Cadmium laser and matching power supply.(with great thanks to Event_Horizon!)(Non-working head...PM me if you have one or information)
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Old 11-06-2010, 12:31 AM #3
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Default Re: Help me find a thread.

i believe it is only good for checking wavelength shifts. i don't think you can shine it through and say "hey, this is a 405" think about it you would need to be able to measure on scales of nanometers LoL

a good experiement you can do is put a 2 different colored lasers on perfectly on top of each other and put a double axis diffraction grating in front. then notice how the dots don't line up vertically but are shifted.
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Old 11-06-2010, 01:04 PM #4
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Default Re: Help me find a thread.

Why the hell did I post this here?
.... I think I'm getting stupid with time.

Thanks to both of you but that's not what I was looking for.

Hell I found it: Single Slit Diffraction Spectroscopy - My Attempt to Calculate Wavelengths

I just remember who created the thread. Xplorer877.

Hope it help you guys too!
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Lasers:
~100mW 405nm from Erdabyz (L) akshakj <- Died once, working again. vid 1 vid 2(repaired)
~980mW 445nm in Ehgemus RPL style host, thanks to MR. DAGUIN vid
~25mW 532nm (potmoded) from DX (dead now, switch died and repair failed...)not moded vid
~50mW 532nm "star cap" style found in the bus. Yeah, lol.
~6mW 635nm diode laser pic 1 pic 2
~250mW 650nm extracted from 20x DVD burner. <- dead vid 1 vid 2
~130mW 650nm extracted from 16X DVD burner. <$15 to make! LPF thread

~100mW 780mn extracted from 52x CD burner. <- dead cremation vid

My Youtube channel
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Old 11-06-2010, 01:10 PM #5
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532 with Envy 532 with Envy is offline
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Join Date: Jun 2010
Location: Somewhere between Here and THere
Posts: 1,491
Rep Power: 126
532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute532 with Envy has a reputation beyond repute
Default Re: Help me find a thread.

That is great! thanks for the link....i'll have to try this out. I am terrible at math but Xplorer877 makes it very clear.
__________________
_______________________________________________

337.1nm Home Built TEA Laser
HeNe lasers a'plenty.Plus that nice one in the avatar
594nm Melles Griot HeNe
594nm Trius Engineering HeNe
405nm handhelds (diy)
445nm handhelds (diy)
473nm B&W Tek lab style
488nm.40mW Multi-Line Argon Ion laser.....(with thanks to Dave)
515nm Argon Ion laser 40mW
532nm lab style 100mW+handhelds (diy)
543nm Melles Griot HeNe
674nm lab style..500mW
808nm 40W FAP diode array
Kimmon IK4123R-B Helium-Cadmium laser and matching power supply.(with great thanks to Event_Horizon!)(Non-working head...PM me if you have one or information)
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