50mW CR2 Green Laser Module, retail $99.99
Manufactured by (unknown)
Last updated 01-14-12

(In reference to the rather fat envelope I received from Hong Kong around 2:29pm PDT on 07-19-06):
{sung like the Foreigner song "Feels Like the First Time"}
Feels like a flaaaaaash-liiiight...feels like a FL

BREAK IN 50276


Let's try that again...as soon as I got the package open, 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 that outputs 50+mW. It comes in a handsome hinge-lidded presentation case, and includes the CR2 cell it feeds from. It is made primarily from aluminum, covered with what I believe is a black baked enamel finish.

The laser is shorter but fatter (larger around) than a standard pen-style unit that uses AAA cells.


Feed the laser module the included battery (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 & release the button on the end of the tailcap. Press & release the button again to turn the laser module back off. This is continuous or hands-free mode.

To use the laser in momentary or signalling mode, press the button more lightly & hold it down for as long as you need the laser spot. Release the button to turn the laser module back off.

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

To change the battery in this green laser module, unscrew and remove the tailcap, throw it in the {vulgar term for feces}bowl, yank that silver handle on the cistern down, and flush it away...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Tip the used CR2 cell out of the barrel and into your hand, and dispose of or recycle it as you see fit.

Insert a new CR2 cell 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 flush away that tailcap now?

Current usage measures 361mA on the included CR2 cell.

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

I tried to cut through the finish to bare Metalgreymon - er - the bare Metalgarurumon - um that's not it either...the bare Metalseadramon...er...uh...wait a sec here...THE BARE METAL (guess I've been watching too much Digimon again! ) with the blade of a Gerber folding knife, and was successful.
Would I really try to chop up a brand spanken new laser I paid perfectly good money for?
You bet your sugar-coated toilet muscle (sweet patootie) I would, if it's in the name of science.

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.

The "catbeat portion of feces female parent initiator of intercourse" (toilet words replaced with innocous ones - the correct acronym is PWPOSMF) tailcap needs to be removed & reattached several times after each battery change before the laser will function.
This doesn't mean the laser is a "segment of poo" (POS), but it will not achieve the highest rating I can award to a DPSS laser either.

gf Beam photograph on the test target at 12".
Beam image bloomed *SUBSTANTIALLY* in this photograph.
Measures 54.387mW on a laser power meter designed for that purpose.
Using the IR filter from my blue DPSS laser held in front of this
laser's beam aperture, output was measured at 13.305mW

Power output measures 31mW.

Power output (peak) measures 21mW with the IR filter from the CNI GLP-473nm Blue Laser Pointer placed between this laser and the power meter.
Both measurements were performed on a LaserBee 2.5W USB Laser Power Meter w/Thermopile.

Spectrographic analysis
Spectrographic analysis of this laser.
Notice the 808nm NIR line from the pump diode is also visible here.

Spectrographic analysis
Spectrographic analysis of this laser.
The IR filter from my Blue DPSS Laser Pointer was used.

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

USB2000 Spectrometer graciously donated by P.L..

Beam photograph on a wall at ~10 feet.
Beam image also bloomed *SUBSTANTIALLY*.

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.

Test unit was purchased on Ebay on 07-03-06, and was received on 07-19-06.

UPDATE: 07-24-06
The tailcap switch is turning out to be a real "catbeat segment of crap momma farking" (toilet words replaced with innocous ones - the correct acronym is PWPOSMF) piece of garbage - even in momentary operation, it is intermittent at best, and continuous operation does not function at all.
I want to viciously throw it into a wall-mounted porcelain urinator to see if it smashes open (the laser module, not the urinator) because it just pisses me off.

Feels stout and sturdy in the hand
Bright green laser output

No or very poor IR filtering
Tailcap switch is not reliable
Not waterproof or submersible - but most modules aren't. Will not figure into my rating.
Can't use it in public without a variance.
More delicate than directly-injected diode laser pointers/modules.

    PRODUCT TYPE: DPSS green laser module
    LAMP TYPE: Green DPSS laser
    No. OF LAMPS: 1
    BEAM TYPE: Very narrow; it's a laser, remember? ;-)
    SWITCH TYPE: Pushbutton momentary/on/off on tailcap
    CASE MATERIAL: Aluminum
    BEZEL: Metal; laser aperture recessed into opening at the end
    BATTERY: 1xCR2 cell
    WATER- AND PEE-RESISTANT: Light splatter-resisatance at maximum
    ACCESSORIES: 1 CR2 cell, hinge-lidded storage case
    WARRANTY: Unknown/not stated


    Star RatingStar Rating

50mW CR2 Green Laser Module *

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