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JediLinux
Wicked Lasers Master
Joined: 20 Nov 2005
Posts: 724
Location: Ohio, USA
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 Posted: 8/08/06, 11:10 PM Post subject: Color Spec |
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I thought this would help to show the intensity of the colors, and each wavelength of colors. Maybe sticky it ?
and for any one else thats wants to add in the rest of the colors,
0-380 and from 740 - 1000 ? (not sure where it ends). Please go ahead.
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Fireball920
Fusion Laser
Joined: 20 Nov 2005
Posts: 392
Location: Wisonsin
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| Posted: 8/08/06, 11:41 PM Post subject: |
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Heh, it doesn't end at 1000. It ends at like 100,000,000 
Last edited by Fireball920 on 8/09/06, 2:30 PM; edited 1 time in total |
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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7544
Location: Canada
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Davidgojr
Wicked Lasers Master
Joined: 13 Oct 2005
Posts: 768
Location: USA
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| Posted: 8/11/06, 12:25 PM Post subject: |
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Thanks for posting this. It's very useful for reference.
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Gadgeteer
Wicked Lasers God
Joined: 30 Jan 2006
Posts: 2304
Location: North Texas
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Bradg
Elite Laser
Joined: 26 Feb 2006
Posts: 163
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| Posted: 8/15/06, 8:22 PM Post subject: |
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| Fireball920 wrote: |
Heh, it doesn't end at 1000. It ends at like 100,000,000
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The electromagnetic spectrum does, but the color spectrum (see title of post) doesn't. |
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Stephanie
Fusion Laser
Joined: 25 Jul 2006
Posts: 369
Location: Canada
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| Posted: 8/20/06, 9:11 AM Post subject: |
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I understand that human vision is most sensitive around 555nm and then the sensitivity tapers off in both directions from there, and have read that the visible spectrum is typically from about 400 to 700 nm.
With my near IR laser (808nm) I can see a very faint red glow. Sort of like as if a 670nm laser had dead batteries and was just struggling to work.
Would that be actual 808nm light that I'm seeing, albeit very faintly? My first assumption was that it was some 'red' light being generated as a side-effect of the laser. But now that I've thought that through, it doesn't make any sense; lasers are supposed to be monochromatic, so if it's running at around 808nm there wouldn't (or shouldn't) be any light at 670nm or any other frequency, right?
Thanks!
-Stephanie
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dominico4
Wicked Lasers Master
Joined: 07 Dec 2005
Posts: 856
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| Posted: 8/20/06, 12:03 PM Post subject: |
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I think the human eye can see ever so slightly into the wavelengths beyond visible light, such as just barely into IR and just barely into UV, but by hardly anything.
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Gadgeteer
Wicked Lasers God
Joined: 30 Jan 2006
Posts: 2304
Location: North Texas
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| Posted: 8/20/06, 12:17 PM Post subject: |
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Steph, it's from what we call the LED effect and though the 808 is fairly narrow band there is a considerable broadband emmision into the red and IR of the slopes. Emmision from diodes, any laser really without etalons, looks similar to the peak spectral eye response chart you are familiar with. Basically looks like a gaussian profile (bell shaped curve for others intrest) and the red that you see is nothing more than out of band emmision. Kind of like a cheap linear splattering on other freqs in a way. That's actually a bad analogy but if it works.... See if you can find a chart of the emmision spectrum from the diode. Don't forget about temperature tuning as well as the output wavelength does shift with temp.
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yathern
Fusion Laser
Joined: 20 Aug 2006
Posts: 350
Location: Here, there.... Everywhere.
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| Posted: 9/01/06, 10:32 AM Post subject: |
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Yathern is confused  Is violet the most effecient, i herd blue was, like a 500 mW red= a 50 mW blue- so is violet beter than blue basicly? im confused  |
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tommygreen23
Wicked Lasers God
Joined: 05 Aug 2006
Posts: 1668
Location: proctor sucks.
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| Posted: 9/01/06, 2:28 PM Post subject: |
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| theres a wave higher than gamma i think, i think its solar waves or somthing like that. can anyone confirm that? |
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Stephanie
Fusion Laser
Joined: 25 Jul 2006
Posts: 369
Location: Canada
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| Posted: 9/01/06, 3:05 PM Post subject: |
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I think Cosmic rays are the highest frequency, but I might be mistaken.
yathern, it depends on what you mean by efficient. There's electrical efficiency then there's perceived brightness, to name but a few.
In terms of perceived brightness, the illustrations at the top of this thread show what colour is perceived the brightest. A 5mW laser at 550nm will look several times brighter than a 5mW laser at either 450nm or 650nm.
In terms of electrical efficiency, that depends a lot on the laser's construction.
And in terms of burning efficiency, it depends on how well the beam is collimated or focused, what the material is to be worked on, and for most lasers, what the colour of the material is vs. the colour of a laser.
It's just not as simple as saying a xx mW of one colour equals xx mW of another colour - not unless you put it in context.
-Stephanie
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tommygreen23
Wicked Lasers God
Joined: 05 Aug 2006
Posts: 1668
Location: proctor sucks.
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| Posted: 9/01/06, 3:22 PM Post subject: |
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cosmic rays... thats what i was thinking of.
a green 5mW takes more energy than a red 5mW, because a green uses a 200mW or higher diode that produces a IR beam, that then goes through a crystal, where lots of the energy is lost, but you get a green beam instead of a IR beam. but if you had a 100mW green dot and a 100mW red dot, as long as they are colminated the same, they will both have the same amount of burning power, on a black object of course |
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Chief-Eamonn
Wicked Lasers God
Joined: 08 Jan 2007
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| Posted: 3/23/07, 3:09 AM Post subject: |
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if anybody still looks at these the spectrum put up by jedi linux goes 500 to 800 back to 700 then to 900?????  |
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DCDJ
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