GREEN LASERS
FROM NEW ZEALAND

Green Lasers from New Zealand, retail (AUS $TBA) ($TBA)*
Manufactured by (Unknown)
Last updated 02-06-07




(In reference to the fat envelope I received from M.G. from NZ on the afternoon of 02-06-07):
{sung like the Foreigner song "Feels Like the First Time"}


These are green DPSS (diode pumped solid state) laser modules that are advertised to output 10mW and 50mW of laser radiation at 532nm in the green part of the spectrum.

They come in a cylindrical chrome-plated brass bodies, and use two AAA cells. They are also properly labelled as to power output.


SIZE



If necessary, feed the laser module the included batteries (see below), and then you'll be ready to rock.

To use the laser module, just aim it at something you wish to point out, and press & hold down the button on the barrel for as long as you need the laser spot. Release the button to turn the laser module back off. Yes, it really is as easy as that.

The laser module comes with a pocket clip, already attached. You know what it's for.
If not, slip the laser module into a shirt or pants pocket, and slide the clip over the outside of the fabric of the pocket when the module is being inserted into the pocket.

The laser module also comes with a hinge-lidded aluminum presentation case with foam cutouts for the module and a set of batteries. You may store the module in this case if desired.



To change the batteries in your green laser module, unscrew and remove the tailcap, dash it to the ground, and stomp on it with spiked golf shoes...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Tip the two used AAA cells out of the barrel and into your hand, and dispose of, recycle, or recharge them as you see fit.

Insert two new AAA cells into the barrel, flat-end (-) negative first. This is the opposite of how batteries are installed in most flashlights, so please pay attention to polarity here.

Screw the tailcap back on, and be done with it.
Aren't you glad you didn't stomp on that tailcap now?

Current usage measures 153mA (for the 10mW unit) and 306mA (for the 50mW unit) on my DMM's 4A scale.



This is a laser module, not a flashlight. So I won't throw it against the wall, stomp on it, try to drown it in the toilet bowl, run over it, swing it against a steel rod, or inflict upon it punishments that flashlights may have inflicted upon them. So this section of the laser's page will seem a bit more bare than this section of the page on a page about a flashlight.

Green diode lasers are a lot different than those common red lasers you see all the time.

In a 640nm red laser module, there's a red-emitting diode and a lens to collimate (focus) the beam.

In a 532nm green laser (module or larger size), there's a BIG infrared laser diode that generates laser light at 808nm, this is fired into a crystal containing the rare-earth element "neodymium". This crystal takes the 808nm infrared light and lases at 1064nm (yes, deeper in the infrared!). This 1064nm laser light comes out of the NdYV04 (neodymium yttrium vanadium oxide) crystal and is then shot into a second crystal (containing potassium, titanium, & phosphorus, usually called KTP) that doubles the frequency to 532nm - the bright green color you see. This light is then collimated (focused) by a lens and emerges out the laser's "business end". Just before the lens, there's a filter that removes any stray IR (infrared) rays from the pump diode and the neodymium crystal. You don't want that stuff in your green beam, trust me. :-)

This is why green diode lasers are so much more expensive than red ones. Lots of itty bitty parts, and they all need to be aligned by hand. If the polarisation is "off", one or both crystals need to be turned. With red diode lasers, you just slap in the diode and slap a lens in front of it.

VERY IMPORTANT!!! This laser is NOT a toy, and you MUST NOT shine it into your eyes, other people's eyes, pets' eyes, for that matter, the eyes of any person or animal you encounter. Eye damage can occur faster than the blink reflex can protect them, regardless of what species' eyes you irradiate with this laser. So just don't do it.
And for heaven sakes (and for Pete sakes and for your sakes too) do not shine this laser at any vehicle, whether ground-based like a car or truck, or air-based like a helicopter, airplane, or jet. And if you shoot it at a person in the dark and he turns out to be a police officer, he may think he's being targeted, pull his gun, and hose you down with it.

This is a CDRH Class IIIB laser device. Treat it with respect, and it'll treat you with respect.

This laser is not water-resistant, so please be extra careful when using it around sinks, tubs, toilets, fishtanks, pet water bowls, or other places where water or water-like liquids might be found. And you'll probably want to cover it up or otherwise get rid of it (such as by putting it in a pocket or bag) if you need to carry it in rainy or snowy weather.

Since this is a high powered laser module, I would recommend a duty cycle of no longer than 50%. That is, one minute on, and at least one minute off to allow the "guts" inside to cool down - the 50mW one anyway.



Beam photograph on the test target at 12".
Beam images bloomed SIGNIFICANTLY; they are also not white.
Measures 9.57mW and 47.67mW on a laser power meter.



Beam photograph on a wall at ~10'.
Beam images bloomed SIGNIFICANTLY; they are also not white.

Those rectangular graphic things near the top are marquees from:
Midway ''Omega Race''
Sega ''Star Trek''
Williams ''Joust''
Venture Line ''Looping''
Universal ''Mr. Do!'s Castle''
Jaleco ''Exerion''
Gremlin/Sega ''Astro Blaster''
Atari ''Tempest''
Gottlieb ''Q*bert''
upright coin-op arcade video games from the 1980s.


Spectrographic plot
Spectrometer plot of the 50mW green laser.
Note the strong emission at 808nm from the pump diode; indicative of an IR filter not being present in this unit.


Spectrographic plot
Spectrometer plot of the 10mW green laser.
There is an IR emission at 808nm, but it is substantially off-axis from the green beam, which is why it is not visible in this chart.


Spectrographic plot
Spectrometer plot of the 10mW green laser; taken at an angle that shows the 808nm emission.
Ocean Optics USB2000 Spectrometer on loan from WWW.TWO-CUBED.COM.





TEST NOTES:
Test units of the 50mW and 10mW green lasers were loaned to me by M.G. in New Zealand on 01-20-07, and were received on the afternoon of 02-06-07.

Products were made in China. A product's country of origin really does matter to some people, which is why I published it on this web page.


UPDATE: 00-00-00



PROS:
Properly labelled as to power output


CONS:



    MANUFACTURER: Unknown
    PRODUCT TYPE: Green "pen-style" laser module
    LAMP TYPE: DPSS laser module
    No. OF LAMPS: 1
    BEAM TYPE: Very narrow spot; it's a laser, remember?
    SWITCH TYPE: Momentary pushbutton on barrel
    CASE MATERIAL: Brass
    BEZEL: Brass; laser aperture (opening) is in its center
    BATTERY: 2xAAA cells
    CURRENT CONSUMPTION: 153mA and 306mA
    WATER RESISTANT: No
    SUBMERSIBLE: No
    ACCESSORIES: 2xAAA cells, presentation case
    WARRANTY: 1 year

    PRODUCT RATING:

    Star Rating





Green Lasers from New Zealand *






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