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Verbal and Photo Descriptions of the Visible Wavelengths

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If you ever find the time, you should post pictures of the dot of each wavelength :)
I've been wanted to do that, but there are so many different dots, and i'm so lazy. :tired:
 

IsaacT

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I am working on getting dot photos together now. Also, updated OP with the process each wavelength is created by. Any beamshots you have please send to me, but makes sure they are good looking images as I would like this thread to be very aesthetically pleasing.

I will be adding gas section in second post soon, so if you have input regarding that, do let me know.


Last but not least, some of the processes were hard to find everything on. If you see a "?" in the process and you can clear it up and offer solid data that would be appreciated.
 

DrSid

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There is so many factors in play .. even with eye alone. Eye perceive colors differently based on other lights around (it more or less does what automatic white balance does in cameras). It also depends on eye condition, especially actual amount of blood in it. For example if you lie down for a while on your side, one of your eye will be lower, and will get more blood. After while, there is visible different in color perception in each eye.
I have also heard that some people perceive short wavelengths like 405nm as purple .. while other do not, and can't distinguish between 445 and 405. I don't have 405 but I suspect I'm one of them, from my experience with spectroscopes.
And then you mix cameras and monitors in .. which make almost pointless ..
Still the pictures are surely nice.

PS. oh and there is of course also luminescence of the materials the laser hits .. especially for short wavelengths ..
 
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IsaacT

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Hmm....well then what about this. As I go about my day I will try to find things that my eyes perceive as the same color as one of our wavelengths. I will choose a common item with little to no variations across units, and put that in as well. If my eye sees a wavelength and an item as the same color, it shouldn't matter what I see, it should only matter that they match, right?
 

ZRaffleticket

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I'll just throw all the common DPSS info out here.
457nm: 808->914 Nd:YVO4
473nm: 808->946 Nd:YAG
556nm: 808->1112 Nd:YAG
561nm: 808->1122 Nd:YAG
671nm: 808->1342 Nd:YAG or Nd:YVO4 (both lase at 1342nm)

SFG:
589nm: 808nm -> 1064nm + 1319nm Nd:YAG
593.5nm: 808nm -> 1064nm + 1342nm Nd:YVO4

(For some reason Nd:YAG doesn't work well in SFG with the 1342nm line... both Nd:YAG and Nd:YVO4 lase at 1064nm and 1342nm yet Nd:YVO4 is used in SFG.)
 
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ZRaffleticket

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635nm - cherry red
650nm - blood red

That's how I relate them

I'll have some decent 473nm/589nm pictures for the thread when I get around to taking more.
 

Gun

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I'm thinking of buying a 450nm laser pretty soon, is it noticeably different to 445nm? Does 450nm look better to you guys? What are the differences between 450nm and the more common wavelengths?
 

IsaacT

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For me here is the issue: the only 450 diode I have owned is a single mode @ 200mW. My 445's have always been 2W or so. So the brightness always removes any ability for me to tell a difference.
 

Gun

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Oh, okay :(. The 450nm I was planning on buying was bloompyle's single mode 450nm @ 80mW.
 

IsaacT

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It will be a very nice build, I personally love my 450 single mode build...although I need a new tailcap for it. It is a very pretty dot.
 

Gun

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Nice :). I'm still tossing up between a couple of lasers, I can only afford one. 450nm @80mW vs 635nm @60mW vs 660nm @250mW. :p
 

Rainbow

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Ugh, the 593.5nm is such a great looking color.

If only the prices for them didn't scare the hell out of me.:scared:
 

DrSid

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Hmm....well then what about this. As I go about my day I will try to find things that my eyes perceive as the same color as one of our wavelengths. I will choose a common item with little to no variations across units, and put that in as well. If my eye sees a wavelength and an item as the same color, it shouldn't matter what I see, it should only matter that they match, right?
Yes .. that should work nicely. More or less, as it can also differ with intensity .. in the end the wavelength alone is the best description. :beer:
 




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