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What do the numbers mean?

Lascannon

New member
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.

Pilgor

New member
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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lasersbee

Well-known member
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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Lascannon

New member
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.

Pilgor

New member
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??

anselm

New member
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

LaZeRz

New member
Power is measured with a thermophile head connected to a callibrated powermeter which converts the lasers heat (i think :thinking 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

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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Lascannon

New member
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.

Lascannon

New member
What a cool thing! Thanks for the link.

qumefox

New member
Power is measured with a thermophile head connected to a callibrated powermeter which converts the lasers heat (i think :thinking 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