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NoobReaper
Modified 10mW Greenie
Joined: 11 Oct 2007
Posts: 13
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 Posted: 10/27/07, 10:02 PM Post subject: White/blac |
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Well, I don't know if it's possible to produce BLACK light, but.
Anyways.
Is it possible to make a white laser? Light bulbs and such are white. >.> |
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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7539
Location: Canada
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Abray
25mW Classic Wicked Laser
Joined: 20 Oct 2007
Posts: 34
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| Posted: 10/28/07, 10:23 AM Post subject: |
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I don't know if this is on topic or not, but how visible would a white beam be?
cause if it has wavelengths from red, green and blue, how would your eye perceive it? |
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NoobReaper
Modified 10mW Greenie
Joined: 11 Oct 2007
Posts: 13
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| Posted: 10/28/07, 10:43 AM Post subject: |
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| Athoul wrote: |
| Black is not possible, however a white laser is possible. Infact it's not s single laser that makes a white laser. A true white laser has superimposed RGB(Red,Green and Blue) lines ontop of each other to produce a white beam. |
I see. So, combining the basic colors, you could achieve a beam that would appear purely white? |
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Rasel
Wicked Lasers God
Joined: 05 Jan 2007
Posts: 1177
Location: Oregon, United States
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| Posted: 10/28/07, 2:22 PM Post subject: |
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| Abray wrote: |
I don't know if this is on topic or not, but how visible would a white beam be?
cause if it has wavelengths from red, green and blue, how would your eye perceive it? |
1. ... depends on conditions I think
2. White 
There are some great pics around here for a white beam... I'lll try to find them again. |
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Mars
4.99mW Green Laser Toy
Joined: 29 Oct 2007
Posts: 3
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| Posted: 10/29/07, 10:41 AM Post subject: |
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2 topics below this are some more topics about this, please read that through.
No, a black laser is nothing, it can't exist, if photons had anti-particles, they could exist.
You can only make a black shadow. |
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final14901
Modified 10mW Greenie
Joined: 10 Jan 2008
Posts: 15
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| Posted: 1/11/08, 9:39 PM Post subject: |
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| do you guys hav any white lasers if so do you hav pics? |
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Schrecken Licht
Wicked Lasers Master
Joined: 05 Jun 2006
Posts: 717
Location: Maryland USA
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| Posted: 1/11/08, 11:12 PM Post subject: |
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I saw a "white" laser at a concert a few days ago; it looked just like a regular laser beam but was really white...of course they had smoke to make it brighter, not sure how well you'd see one under different conditions with no smoke.
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Lasers are like potato chips - you can't have just one!
Nexus 95mw, Confirmed 173 mw Pulsar, , 131mw argon-ion laser, Core laser, and Signature Fusion 125mw, 100mw blue - average output 131mw - lab laser, and a 20 WATT (yeah you read that right!) CO2 laser!:
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Spyderman
Elite Laser
Joined: 06 Jan 2008
Posts: 126
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| Posted: 1/15/08, 3:15 PM Post subject: |
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white yes, black no
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Spyderman II GX
Owner of a 5mW green ebayser and a 35mW infiniti |
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godfrey
Wicked Lasers Master
Joined: 23 Feb 2006
Posts: 957
Location: St. Louis, MO
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| Posted: 2/15/08, 9:01 AM Post subject: |
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| final14901 wrote: |
| do you guys hav any white lasers if so do you hav pics? |
I do, as does Gottaluvlasers, but neither of them are just white. We have to combine the output of three colors. However there are white light lasers, most are gas with an Argon/Krypton mixture but most all of them are large frame, water cooled and run anywhere from 208 to 480 volts three phase. Coherent makes a few like the Innova C series.
It's been well over a year since I had it setup, but as you can see from the photos I'm running an Argon at 488nm for blue, a DPSS at 532nm for green and diode laser running around 650nm for red.
The beams are combined in a prism that I removed from a 3 chip CCD imager from a broadcast video camera. In front of the green laser are two polarizers to lower the brightness otherwise the output would be too green.
It was a pain to align the three using the parts I had available at the time.
If you were to shine this in another prism to separate out the colors, you would only get 488/532/650, not the entire spectrum, since it does not comprise of it.
If you blocked blue you'd get yellow. If you blocked green you'd get purple and so on.
I would assume my total output here was about 30mW.
Enjoy!
Phil |
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Murudai
Phoenix Laser
Joined: 18 Apr 2008
Posts: 79
Movie(s): 1
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| Posted: 4/22/08, 6:43 AM Post subject: |
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Wow, cool pics. White lasers look really cool  |
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Scraleontis
25mW Classic Wicked Laser
Joined: 28 Apr 2008
Posts: 31
Location: The Netherlands
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| Posted: 4/28/08, 7:28 AM Post subject: |
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Yup thats right. Black is shadow. Its as impossible to make a black laser as it is to make a white shadow. A white laser is all the main colours together Red, Green and Blue.
You'd need a red, a green and a blue laser with similair strength, put together in one beam. |
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CrazyKenny
Elite Laser
Joined: 03 May 2007
Posts: 146
Picture(s): 3
Movie(s): 1
Location: Germany
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| Posted: 4/28/08, 11:58 AM Post subject: |
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| Scraleontis wrote: |
You'd need a red, a green and a blue laser with similair strength, put together in one beam. |
Not same strenght, because green apears stronger than red, yo have to mix about that: 60 mw red, 20 mw green, 40 mw blue to get white
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green 50mw ebay laser (mounted on telescope)
homemade DVD-Burner Laser (~120mW, divergence: 0.05 !)
RGY laserscanner (130mW red 60mW green) 
300mW green Laser module from ebay
money spent on lasers: ~1800 $ (some are broken...) |
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Hanneman
4.99mW Green Laser Toy
Joined: 02 Jun 2008
Posts: 7
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| Posted: 6/02/08, 2:31 AM Post subject: |
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Sometimes, you can take the prism out of an Ar-Kr laser, which has numerous lines, and the output will look white.
Someone has developed a supercontinuum laser that produces white light over the visible range. I think it uses a NdYAG laser to pump a nonlinear optical fiber. Light in the fiber undergoes multiple frequency mixing and splitting processes, similar to a KDP and OPO crystal, to produce continuous white light. |
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