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Laserlands 5mW 520nm

Hap

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^Yeah!

In Europe, due to the Gulf Stream you can easily finds town that are driveable as far North as 70°N latitude. It still gets pretty chilly in mid-winter, but nowhere near what is found back in N.A :(

-Alex
 

paul1598419

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How many lines did you use to calibrate your spectrometer, diachi? If it was four, that 513nm might not be that accurate. The more lines you use the better your calibration. Also, don't expect to get anything close outside your two farthest lines.
 

diachi

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How many lines did you use to calibrate your spectrometer, diachi? If it was four, that 513nm might not be that accurate. The more lines you use the better your calibration. Also, don't expect to get anything close outside your two farthest lines.

I used 473, 488, 532 and 633. Those are the only stable/known lines I have at the moment. The 513nm and 525nm readings I got are at the least, fairly close, just going by colour comparison with 532nm. Need more DPSS/gas lasers to test these things (anyone want to lend me an Ar/Kr or a 561/589/593? :D). May experiment with getting other lines out of my bigger HeNe such as 612nm or 594nm using an external mirror, although chances are slim that it'll work.
 
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paul1598419

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I have those lines as well, but am using some neon ones to fill in the reds. If you can find the lines in a 632.8nm HeNe discharge light, I'd use that.
 

diachi

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I have those lines as well, but am using some neon ones to fill in the reds. If you can find the lines in a 632.8nm HeNe discharge light, I'd use that.
I did take a look at that, but I'm not sure which spectral lines to look for, I need to find a better list of the lines to reference.

That said, I did look at the spectral lines from the discharge of my HeNe with the spectro and it's fairly close, at least for the lines I know.



543 is dead on, 592 is a little out, 612 is dead on, 633 is dead on (I know it's 633.8, but I calibrated it to 633). IIRC 500nm is dead on too. I may need to revisit it with the updated software (zoom function would help tremendously) and a list of the major spectral lines.
 
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paul1598419

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Your 633nm is not 633.8nm, but 632.8nm. That will throw you off a full nm. I'd let it run for awhile to stabilize before using it, though.
 

diachi

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Your 633nm is not 633.8nm, but 632.8nm. That will throw you off a full nm. I'd let it run for awhile to stabilize before using it, though.

Woops, yes, right you are. Knew there was a reason I calibrated it to 633 and not 634. Blame the beers I had last night. :D
 




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