BLUESKY STEALTH >100mW
GREEN LASER MODULE

Bluesky Stealth >100mW Green Laser Module $244.62 (£150.00)* (www.blueskymarketing.co.uk...)
Manufactured by (unknown) for Bluesky Marketing www.megagreen.co.uk
Last updated 10-12-09

* IMPORTANT: Pricing is accurate as of 08-17-09. Please visit the Currency Calculator for the latest currency conversion rates from British pounds to US dollars.




(In reference to the package I received from Bluesky Marketing around 2:07pm PDT on 05-30-07:
{sung like the Foreigner song "Feels Like the First Time"}

This is a DPSS green laser module, advertised to output more than 100mW of laser radiation at a wavelength of 532nm.

Although this power level is too high for the instruments at my disposal to measure, I did irradiate my finger with it and felt a strong stinging sensation, it caused the destruction of a balloon, spun the vanes of a Crooke's radiometer, and spectroscopy revealed no NIR radiation at 808nm from the pump diode.

So it is extremely well filtered for NIR radiation at worst; completely filtered at best.




SIZE



Feed the laser module the included Toshiba alkaline AAA cells (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.



To change the batteries in your Stealth 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 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 flush away that tailcap now?

Current usage measures 662mA on the included Energizer cells.



This is a laser module, not a flashlight. So I won't whack it against a steel rod, run over it, try to drown it in the loo ("toilet", "toilet stool", "john", "can", or "commode" for US viewers), throw it, stomp on it, or subject it to other abuses that a flashlight might have to endure.

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 radiation at 808nm, this is fired into a crystal containing the rare-earth element "neodymium". This crystal takes the 808nm near-infrared radiation and lases at 1064nm (yes, deeper in the infrared!). This 1064nm laser radiation 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) radiation 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 fer chrissakes (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 motorcycle, 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, unholster (pull out) 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. This is not stated anywhere on the packaging or on the website, but is my own recommendation. It does state that you should keep the laser on for no more than three minutes at a time, but no mention is made of how long it should be turned off between uses.

I attempted to burn my finger with the laser beam. I fired the laser up, aimed it at my index finger, and within two seconds, an unpleasant stinging sensation was detected. The stinging was unpleasant enough that I turned the laser off at once and shook my hand in effort to reduce the pain. I smelled my finger afterwards to try and detect that characteristic odour of burned flesh, and did not detect that odour. No lenses or other optics of any type were used to focus the beam for this experiment.

This laser will also cause tobacco to smoke and black ballons to pop in less than a second... again, no lenses or optics were used.

The CDRH label indicates that this laser is rated to output more than 100mW of laser radiation at 532nm, so the labelling does indeed to appear accurate.



Photograph of the beam spot on the test target at ~12".
Beam is not white like this photograph makes it appear.
Beam spot is significantly smaller than it appears; the beam image bloomed quite a bit.

Power output is too high to be measured with the instruments at my disposal.



Photograph of the beam spot on a wall at ~10'

Beam is not white like this photograph makes it appear.

Beam is smaller than it appears; the beam image also bloomed when photographed.
And those artifacts around and toward the upper right of the beam spot in this photograph do not really exist.



Photograph of the beam spot on a wall at ~10'; photoflash was used this time.

Beam is not white like this photograph makes it appear.

Beam is smaller than it appears; the beam image also bloomed when photographed.
Those rectangular graphic things in the upper left quadrant of these photographs are marquees from:
Nintendo ''R-Type''
Super Tiger...er...uh...Konami ''Super Cobra''
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.

And that graphic toward the right is:
A "BIG SCARY LASER" poster sent by www.megagreen.co.uk




Beam spot on a structure ~200 feet away in full daylight (2:09pm PDT 06-02-07).
Telephotograph (4x) was used; beam image bloomed a bit because it was the brightest
thing in the frame when compared with other structures & objects in this photograph.



Beam spot on a structure ~200 feet away in full daylight (6:15pm PDT 06-02-07).
Telephotograph (4x) was used; beam image bloomed a bit because it was the brightest
thing in the frame when compared with other structures & objects in this photograph.
Direct sunlight was hitting the structure at the time; this is the reason for the red arrow pointing out the beam.



Beam spot on a structure ~200 feet away in twilight (8:02pm PDT 06-02-07).
Telephotograph (4x) was used; beam image bloomed a bit because it was the brightest
thing in the frame when compared with other structures & objects in this photograph.



Beam spot on a structure ~6 feet away in direct sunlight (5:34pm PDT 06-24-07).
Beam image bloomed a bit because it was the brightest thing in
the frame when compared with other objects in this photograph.



Beam spot on a structure ~150 feet away in full daylight (11:57am PDT 07-15-07).
I used the magnifying lens cap from my Wicked Lasers Pulsar for this photograph.
Camera was set for 12x zoom.



Beam photograph in light fog, taken at ~5:49am PDT 11-01-07.


Spectrographic plot
Spectrographic analysis of this laser.
I checked for NIR by irradiating the spectrometer's sensor to overload, and none was found.


Spectrographic plot
Same as above...{alarm sounds} {female computer voice} INPUT OVERLOAD!!!*
Let's try this again...same as above, but deliberately overloaded to check for the pump diode's 808nm laser line.
Note that there is none.


Spectrographic plot
Spectrographic analysis of this laser; spectrometer's response narrowed to a band between 750nm and 850nm to show NIR line from the pump diode. This emission did not exist when the laser was new and working properly.
USB2000 spectrometer graciously donated by P.L.



WMP movie (.avi extension) showing the laser destroying a balloon.
This clip is approximately 0.45 megabytes (499,950 bytes) in length; dial-up users please be aware.
It will take no less than two minutes to load at 48.0Kbps.

That music you might hear is from a demo I wrote for the Commodore 64 computer in 1992.
The demo's actual filename is a toilet word, so I cannot say it here. It starts with "PU" and ends with "ED".
Think of a kitty cat being flogged with a long instrument used for administering a beating and you can probably figure it out.

I should call this laser "The TVA Balloon Destructor" - based on something I drew in the 7th or 8th grade called the "TVA Light Bulb Destructor", in which a hydraulic piston affair slowly came down on light bulbs while they were burning base-down in receptacles at the bottom of the device. I never got around to constructing one, but I did conceive and draw it. That's my story, and I'm sticking to it.
This is a true "eye-killing toilet destructor" if ever I saw one.


WMP movie (.avi extension) showing the laser spinning the vanes of a radiometer.
This clip is approximately 8.0 megabytes (8,278,276 bytes) in length; dial-up users please be aware.
It will take no less than thirty minutes to load at 48.0Kbps.

I cannot provide either clip in other formats, so please do not ask.

That music you might hear is from the trainer screen for the Commodore 64 game "Wastelands" from ~1989.

I do not have an outdoor laser testing facility at my new California location,
so I will not be able to provide any distance photographs of over ~200 feet.





TEST NOTES:
Sample of the Stealth green DPSS laser module was provided by Paul of Bluesky Marketing, and was received on 05-30-07.
The main website for Paul's laser modules is www.megagreen.co.uk.

VERY IMPORTANT: You can purchase green DPSS laser pointers with less than 1mW of total radiated power (CDRH Class II) if you live in Europe or the UK from www.laserpointers.co.uk. Lasers like this also come in pen-style housings, and use two AAA cells for power.

Surface shipping is FREE worldwide; you may substitute faster shipping methods though if you are willing to pay for them.

* From the Star Trek TNG episode "Home Soil".


UPDATE: 07-13-07
The lens caps from the Wicked Lasers Pulsar fit this laser; I installed the magnifying one last night and attempted to ignite tobacco. The intense spot was too small to start ignition, but smoke was issuing from the end of the "siggy butt" and the end had some visible black spots on it. It also caused smoke and melting to occur on a "Butt Bucket" brand self-extinguishing ashtray.


UPDATE: 07-31-07
This laser is visible in trees ~300 feet in daylight (~8:00am PDT 07-31-07) - when I direct it at the leaves and fire it, I can clearly see the green spot. And this was when the laser was discharged through mosquito mesh netting, no less.


UPDATE: 08-18-09
The laser has just about failed.
It gets quite warm very quickly, but emits no laser radiation...hmmm now it's functioning again, but the green output is quite low. Measures 1.245mW with known-new batteries.

Because this failure may just be a fluke, the 5-Star rating I assigned will not be altered unless I start to receive multiple reports of the same type of failure.


UPDATE: 08-18-09
No, you aren't seeing things.
Yes, a same-day update.
The laser has ***COMPLETELY*** failed now.
It has developed a short circuit; when it sat unused for awhile, I went to pick it up and it was VERY warm (est. 125°F). I wasted no time in unscrewing the tailcap and dumping the hot AAA cells into a nearby wastepaperbasket.

Later, I examined the inside of the barrel with (you guessed it) an LED flashlight, and noted that the battery negative (-) spring was noticeably deflected to the side...when the batteries are loaded, this spring touches the inner surface of the barrel, causing the short circuit.

Although this might have been a fairly simple "fix" at my old Seattle location from prior to October 2004, I no longer have an appropriate tool for the job.

Therefore, that dreadful "" icon will appear next to its listings on this website; indicating that since it has failed, I can no longer perform additional analyses or comparisons of it.


UPDATE: 10-07-09
I have sent this laser to a laser expert on the east coast of the United States so that he can take a stab at repairing it.


UPDATE: 10-12-09
This person was not successful in repairing it; he suspects the pump diode may have gone tits-up. I have given him permission to keep it, so the "" icon will be staying and the "" icon will be added.


PROS:
Properly labelled for class & power output
Beam is clean, with no speckling or other artifacts in it
Well-filtered to eliminate virtually all 808nm NIR (near-infrared) laser radiation from the pump diode
Powerful enough to burn, destroy, and leave wrinkles everywh...o wait!!! wrong infomercial!!!
Batteries it uses are common and relatively inexpensive
Nice looking case


CONS:
Not waterproof or submersible - but most modules aren't. Will not figure into my rating.
Consumes a lot of power, so you'll be going through batteries if you use it a lot.
Can't use it in public without a variance.
More delicate than directly-injected diode laser pointers/modules. Will not figure into my rating.


    MANUFACTURER: Unknown
    PRODUCT TYPE: Green DPSS laser module
    LAMP TYPE: DPSS Laser
    No. OF LAMPS: 1
    BEAM TYPE: Very narrow; it's a laser, remember? ;-)
    SWITCH TYPE: Pushbutton click on/off/momentary on barrel
    BEZEL: Metal; an aperture (hole) is in it to allow laser beam to emerge
    BATTERY: 2xAAA cells
    CURRENT CONSUMPTION: 662mA
    WATER RESISTANT: No (*very* light sprinkle-resistance at maximum)
    SUBMERSIBLE: NO WAY HOZAY!!!
    ACCESSORIES: 2x Toshiba alkaline AAA cells, lens cleaning cloth
    WARRANTY: Limited 1 year

    PRODUCT RATING:

    Star Rating







Stealth >100mWGreen DPSS Laser Module * http://www.blueskymarketing.co.uk...






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