Old 05-12-2011, 10:55 AM #1
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Default What do the numbers mean?

I often see, when exploring this site waiting for my diode to arrive, comments like "4mW 42nm yellow" or, in the advertizement that just apeared, 200mW 499nm"

I have a rought idea, but nothing specific. Could someone please clarify what these two numbers are, what the abreviation next to them means, and what aproxomate values correspond to?

Thanks.


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Old 05-12-2011, 11:02 AM #2
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Default Re: What do the numbers mean?

if it ends in mW or W it is how strong it is, if it ends in nm it is the colour. (wavelength)

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Old 05-12-2011, 11:04 AM #3
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Default Re: What do the numbers mean?

200mW and 532nm..... would mean that the power of
that Laser is rated at 200 MilliWatts or 0.200 Watts.
The color of that Laser is Green at a wavelength of 532
nanometers....

Jerry
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Old 05-12-2011, 12:31 PM #4
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Default Re: What do the numbers mean?

Ok, so the nm is the frequency (color) of the laser, and the W/mW is the power levels? Thanks. How is the power of a laser measured? Range, effect, output?

Thanks.
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Old 05-12-2011, 12:36 PM #5
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Default Re: What do the numbers mean?

power is measure with an LPM. lasersbee company sells some of the best hobbyist meters out there. Range is basically infinite, it is light after all. Effect and output, what do you mean??
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Old 05-12-2011, 12:42 PM #6
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Default Re: What do the numbers mean?

Quote:
Ok, so the nm is the frequency (color) of the laser,
not exactly.... frequency = c/wavelength, or wavelength = c/frequency
where c = speed of light in meters per second.
wavelength = well, the wavelength in meters


here's a handy calculator:
FREQUENCY & WAVELENGTH CALCULATOR
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Old 05-12-2011, 12:49 PM #7
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Default Re: What do the numbers mean?

Power is measured with a thermophile head connected to a callibrated powermeter which converts the lasers heat (i think ) into a power level in mW,

just an FYI

405nm = UV/Blu-ray (goes up to around 800mw's)

445nm=blue (goes up to 2w's in power)

473nm is a beatiful light blue but really expensive, around 15mw's of it will set you back a few hundred

532 is green as Jerry (laserbee) stated, green is the most visible wavelenght to the human eyes (goes up to 700-800mW max in portables)

589 is yellow/orange which is really expensive like 473nm, 50-60mW max in portables

635nm is bright, light coloured red (250mW max in portables)

650-660nm is a darker red which comes in a max of 300-350mW if you have a freak diode and a 650 g-1 lens from Jayrob

808nm and higher is invisible Infrared

Hope that answered your question

wavelength is measured by the distance between the top and bottom of a "wave" of light, a 405nm laser would have a shorter wave then a 532nm laser for example, nm = nanometers
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Old 05-12-2011, 12:49 PM #8
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Default Re: What do the numbers mean?

Never mind. That question was a little garbled. Does anyone have a reliable link for an LPM?

Thats a very clear explanation of nm. Thanks you.
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Old 05-12-2011, 12:59 PM #9
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Default Re: What do the numbers mean?

http://laserpointerforums.com/f64/j-...now-61644.html You need a computer for this one, another option is the raident alpha but those are hard to get atm.

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Old 05-13-2011, 12:54 AM #10
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Default Re: What do the numbers mean?

What a cool thing! Thanks for the link.
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Old 05-13-2011, 01:38 AM #11
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Default Re: What do the numbers mean?

Quote:
Originally Posted by LaZeRz View Post
Power is measured with a thermophile head connected to a callibrated powermeter which converts the lasers heat (i think ) into a power level in mW,

just an FYI

405nm = UV/Blu-ray (goes up to around 800mw's)

445nm=blue (goes up to 2w's in power)

473nm is a beatiful light blue but really expensive, around 15mw's of it will set you back a few hundred

532 is green as Jerry (laserbee) stated, green is the most visible wavelenght to the human eyes (goes up to 700-800mW max in portables)

589 is yellow/orange which is really expensive like 473nm, 50-60mW max in portables

635nm is bright, light coloured red (250mW max in portables)

650-660nm is a darker red which comes in a max of 300-350mW if you have a freak diode and a 650 g-1 lens from Jayrob

808nm and higher is invisible Infrared

Hope that answered your question

wavelength is measured by the distance between the top and bottom of a "wave" of light, a 405nm laser would have a shorter wave then a 532nm laser for example, nm = nanometers
Aryntha has a 561nm portable. It per mW is brighter to the eye than 532nm.

589nm is available in much higher than 60mw in portables as well.

actually all your powers listed can be exceeded.. It just depends on your budget.
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