GL-1-GSP-11 Green Laser Pointer, retail $66.60
Manufactured by (Unknown)
Last updated 10-02-09

(In reference to the rather fat envelope I received from 2shopper-auctions around 1:55pm PST on 01-08-07):
{sung like the Foreigner song "Feels Like the First Time"}

This is a green DPSS (diode pumped solid state) laser pointer that outputs just over 4mW of laser radiation at 532nm in the green portion of the spectrum. It comes in a handsome hinge-lidded presentation case, and includes the CR123A 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 pointer the included battery (see below), and then you'll be ready to rock.

To use the laser pointer, 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 pointer back off. This is continuous or hands-free mode.

There is no momentary operation available when the laser is on, however, you can blink the laser while it is on by partially depressing the tailcap button. If you don't mind the backward or reverse feeling of this, you can blink the laser pointer this way.

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

To change the battery in this green laser pointer, 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 CR123A cell out of the barrel and into your hand, and dispose of or recycle it as you see fit.

Insert a new CR123A 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 136mA on the included CR123A cell.

This is a laser pointer, 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 concrete floor of an outdoor patio, 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.

I tried to cut through the finish to bare Metalgreymon - er - the bare Metalgarurumon - um that's not it either...the bare a sec here...THE BARE METAL (guess I've been watching too much Digimon again! ) with the blade of a folding knife, and was successful - quite easily too I might add.
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 lightly water-resistant, but it is ***NOT*** waterproof or submersible. 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 if the rain is more than just a light sprinkle. It failed "The Suction Test" I gave it; there is also no O-ring on the tailcap. So even though the advertising says "Can be used underwater", you'll likely be very sorry if you really try that.

Beam photograph on the test target at 12".
Beam image bloomed significantly; it is also not white in the center.
Power output measures 4.1535mW on a laser power meter.

Beam photograph on a wall at ~10'.

Those rectangular graphic things on the wall 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
Spectrographic analysis of this laser.
This spectrographic analysis shows the presence of an IR filter.

Spectrographic plot
Same as above; newer spectrometer software & settings used.
USB2000 spectrometer graciously donated by P.L.

Test unit was purchased on Ebay on 12-31-06, and was received on the afternoon of 01-08-07.

UPDATE: 00-00-00

Includes an IR filter
Labelling (CDRH Class IIIa) is accurate
Low current usage
Different styled case than many other laser pointers

Uses a battery type that could be expensive or difficult to find in an emergency
Not waterproof, unlike the ad copy stated

    PRODUCT TYPE: Green laser pointer
    LAMP TYPE: DPSS laser assembly
    No. OF LAMPS: 1
    BEAM TYPE: Very narrow spot
    SWITCH TYPE: Pushbutton on/off on tailcap
    CASE MATERIAL: Aluminum
    BEZEL: Metal with laser aperture (hole) in it
    BATTERY: 1xCR123A cell
    WATER RESISTANT: Light splatter-resistance at maximum
    ACCESSORIES: 1xCR123A cell, hinge-lidded storage case
    WARRANTY: Unknown/not stated


    Star Rating

GL-1-GSP-11 Green Laser Pointer *

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