EBAY 532nm GREEN
LASER MODULE (2)

Ebay Green Laser Module (2), retail $40.28
Manufactured by (Unknown)
Last updated 09-12-10




(In reference to the padded envelope I received from an Ebay seller at 3:02pm PDT on 08-15-06):
{sung like the Foreigner song "Feels Like the First Time"}
Feels like a flaaaaaash-liiiight...feels like a FL

BREAK IN 12288
READY.
CONT

?OUT OF DATA ERROR IN 24576
READY.
Let's try that again...as soon as I saw the address on the package, I *knew* it wasn't a flashlight...

Feels like a laaaaaa-sssser...feels like a LAAAAA-aaaaa-ssser!!!
Feels like a laaaaaa-sssser...feels like a LAAAAA-aaaaa-ssser!!!

This is a green DPSS (diode pumped solid state) laser module. It comes in a metal storage case, and includes the two AAA cells it feeds from.

It comes in what I believe is an aluminum alloy body.


SIZE



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 fabric-covered metal 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 the laser at the halfway point, throw the front end of the laser in the toilet bowl, yank that silver handle on the cistern down, and flush it away...O WAIT!!! THAT'S THE GOOD PART!!! 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, button-end (+) positive first. This is the opposite of how batteries are installed in most flashlights, so please pay attention to polarity here.

Screw the front half of the laser back on, and be done with it.
Aren't you glad you didn't flush away "the good part" of the laser now?

Unable to measure current due to how the product was constructed.



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 the corner of a concrete stair, or inflict upon it punishments that flashlights may have inflicted upon them. So this section of the laser's web page will seem a bit more bare than this section of the web 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 pointer, there's a red-emitting diode and a lens to collimate (focus) the beam.

In a 532nm green laser (pointer 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.

This laser is lightly splatter-resistant, but it is not water- or pee-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.

The labelling on this laser is *NOT* accurate: it states that it is a Class IIIA instrument, outputting less than 5mW of laser radiation at a wavelength of 532nm, and it actually measures 12.420mW at 532nm.



Beam photograph on the test target at 12".
Beam image bloomed *SUBSTANTIALLY*; beam is also not white.
Power measures 12.420mW on a laser power meter designed for that purpose.



Beam photo at ~10'.
Beam is not white like this photograph makes it appear.
Beam is also somewhat smaller than it appears;
the beam image also bloomed when photographed.

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''

upright coin-op arcade video games from the 1980s.

And that red star thing on the marquees is from an American DJ Laser Widow.


Spectrographic plot
Spectrometer plot of this laser.


Spectrographic plot
Spectrographic analysis of this laser; newer spectrometer software & settings used.


Spectrographic plot
Spectrographic analysis of this laser; spectrometer's response band narrowed to show NIR emission from the pump diode.
As you can see, there is none. This indicates that the IR filter is doing its job very well.

USB2000 spectrometer graciously donated by P.L.



TEST NOTES:
Test unit was purchased on Ebay on 08-02-06, and was received in the mid-afternoon of 08-15-06.

It is not known where the product was made.


UPDATE: 00-00-00



PROS:
IR filtering is extremely good


CONS:
Unit's output measures as CDRH Class IIIb (>5mW), not CDRH Class IIIa (<5mW) it is labelled for.
Shouldn't use it in public without a variance.
More delicate than directly-injected diode laser modules/pointers.


    MANUFACTURER: Unknown
    PRODUCT TYPE: Handheld laser
    LAMP TYPE: DPSS laser diode
    No. OF LAMPS: 1
    BEAM TYPE: Very narrow spot
    SWITCH TYPE: Momentary pushbutton on/off on barrel
    CASE MATERIAL: Possibly an aluminum alloy
    BEZEL: Metal; laser aperture recessed in a cell for it
    BATTERY: 2xAAA cells
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER RESISTANT: Splatter-resistant at maximum
    SUBMERSIBLE: No
    ACCESSORIES: Batteries, metal storage case
    WARRANTY: Unknown/not stated

    PRODUCT RATING:

    Star Rating





Ebay Green Laser Module (2) *






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