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Old 11-13-2012, 09:44 PM #481
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Default Re: "CLOSED.!!!" GB: For The New 3.8mm Red Diodes 660nm (REFUNDING.!!!!!!)

Pretty sure the ir is for reading and the red is for writing.


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Last edited by Fiddy; 11-13-2012 at 09:44 PM.
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Old 11-14-2012, 12:58 PM #482
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Default Re: "CLOSED.!!!" GB: For The New 3.8mm Red Diodes 660nm (REFUNDING.!!!!!!)

thanks again fiddy!
@kizdawg - yeah, it would put out 2 beams, no "addition". there's a pic of both sides running here: 250mW 350mW 200mW Dual Wavelength 3 8mm Laser Diode 650nm 780nm Dual Band | eBay
it's near the bottom of the page
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Old 11-14-2012, 01:23 PM #483
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Default Re: "CLOSED.!!!" GB: For The New 3.8mm Red Diodes 660nm (REFUNDING.!!!!!!)

Very cool. Would be good for some sort of a security system or something. And thanks cheech that was exactly what I needed to read.
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Old 11-14-2012, 08:01 PM #484
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Default Re: "CLOSED.!!!" GB: For The New 3.8mm Red Diodes 660nm (REFUNDING.!!!!!!)

one very cool thing (i think) is that the 780 is single mode - no big multimode"bar" to tame. it makes a nice spot.
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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
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Old 11-15-2012, 07:15 AM #485
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Default Re: "CLOSED.!!!" GB: For The New 3.8mm Red Diodes 660nm (REFUNDING.!!!!!!)

Yes 780nm at arounf 150-200mW are used in CD burners, 650nm are used in CD readers. They're usually both single mode and its not unusual to find them both in one package.
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Old 11-15-2012, 12:32 PM #486
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Default Re: "CLOSED.!!!" GB: For The New 3.8mm Red Diodes 660nm (REFUNDING.!!!!!!)

The 780nm is for CD and the 650nm is for DVD.
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Old 11-15-2012, 02:34 PM #487
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Default Re: "CLOSED.!!!" GB: For The New 3.8mm Red Diodes 660nm (REFUNDING.!!!!!!)

The 780nm is for fish and the 650nm is for elephants.

Sorry I had to!
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Old 11-15-2012, 10:33 PM #488
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Default Re: "CLOSED.!!!" GB: For The New 3.8mm Red Diodes 660nm (REFUNDING.!!!!!!)

780 is for cds, 660 for dvds, 405 for blu-ray. lowering the wavelength is a cheap trick to fit more data in the same area by allowing it to write with smaller and smaller resolution. This is the same reason why chip fab at really really low feature sizes uses a very low wavelength UV as the source light for "etching" the chips.
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