405nm 5mW VIOLET PURPLE BLUE
RAY LASER MODULE PEN


405nm 5mW Violet Purple Blue Ray Blue Laser Module Pen, retail $7.86
Manufactured by: (Unknown)
Last updated 09-21-10





(In reference to the padded envelope I received from an Ebay seller at 3:33pm PDT on 08-02-10):
{sung like the Foreigner song "Feels Like the First Time"}


The 5mW Violet Purple Blue Ray Blue Laser Module Pen is a violet-emitting, directly-injected laser. That is, it produces violet laser radiation directly, without the need for messy, fragile nonlinear crystals like those green laser pointers and the amberish-yellow and blue ones as well. It uses two AAA cells -- the same power source used in most other "pen-style" laser pointers and laser modules.

It is advertised to output 5mW of laser radiation at ~405nm.
It actually measures 15.80mW at 404.40nm!!!

It comes in a handsome brass body with a black finish and chrome colored bezel, tailcap, and pocket clip.


 SIZE



To get the laser to turn on, first be certain that there are a pair of AAA cells installed. If there isn't, then install them (see directly below), and THEN you can go irradiate something.

Aim the laser well-away from your face first. Press & hold down the button on the barrel for as long as you want or need the laser spot, and release pressure on the button to turn the laser back off.



To change the batteries in this violet laser , unscrew the laser near the center, throw the upper portion into the dustbin (garbage can), tie off the bin liner (plastic garbage bag), carry it to outdoor wheelie bin (wheeled garbage can), throw it in, slam the lid down, and wait patiently for garbage day so that the dustman (garbage man) empties the wheelie bin into his dust lorry (garbage truck)...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, 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 front portion of the tube back on, and be done with it.


Unable to measure current use due to how this laser was constructed.



This is a self-contained laser , and not a flashlight meant to be carried around, thrashed, trashed, and abused - so I won't try to drown it in the toliet tank, bash it against a steel rod or against a concrete porch, let my mother's big dog's ghost or my sister's kitty cats piddle (uranate) on it, run over it with a 450lb Celebrity motorised wheelchair, stomp on it, use a small or medium ball peen hammer in order to bash it open to check it for candiosity, fire it from the cannoņata, drop it down the top of Mt. Erupto (I guess I've been watching the TV program "Viva Piņata" too much again - candiosity is usually checked with a laser-type device on a platform with a large readout (located at Piņata Central {aka. "Party Central"}), with a handheld wand that Langston Lickatoad uses, or with a pack-of-cards-sized device that Fergy Fudgehog uses; the cannoņata (also located at Piņata Central) is only used to shoot piņatas to piņata parties away from picturesque Piņata Island, and Mt. Erupto is an active volcano on Piņata Island), send it to the Daystrom Institute for additional analysis, or perform other indecencies on it that a flashlight might have to have performed on it. So this section of the web page will be ***SIGNIFICANTLY*** more bare than this section of the web page on a page about a flashlight.

This is a directly-injected laser though, who's active components are the inverter circuit, the laser diode, and the collimating lens. So it should withstand accidents better than a DPSS (diode pumped solid state) laser - the type of laser assembly found in yellow (593.5nm), green (532nm) and blue (473nm) laser pointers. These lasers have several additional components (crystals, filters, etc.) in the optical train, and you can knock them out of alignment by doing little more than looking at them the wrong way. And if any of these components are knocked out of whack, you'll no longer get your yellow, green, or blue laser beam.
Though you still do not want to intentionally drop your violet-emitting laser because it's a precision optical instrument.

***EXTREMELY IMPORTANT!!!***
This laser has a fair amount of {vulgar term for testicles} to it (measured at 15.80mW), so you ***DEFINITELY*** do not want to 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 Christ sakes (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 (whip out) his gun, and hose you down with it.

Does this evaluation look an awful lot like the one I made for this laser?
Thought you'd say so.
That's because they're functionally (and virtually physically) identical {apparently differing only in the color of the laser warning label}, so I was able to use its web page as a template for this one.



Beam photograph of this unique laser on the test target at 12".
Beam image bloomed ***SIGNIFICANTLY***.
That white & blue color does not really exist; the spot appears to be a very deep royal purple to the eye.
Digital cameras have a tough time at these wavelengths.

And yes, I know that the colors purple and violet are two different critters, but the phrase "royal violet" would not make very much sense; however, most everybody knows what "royal purple" looks like.
Purple is a mixture of red & blue; violet is a spectral color, encompassing wavelengths of ~390nm to ~410nm.

Measures a fairly hefty 15.80mW on a Sper Scientific Pocket Laser Power Meter # 840011; using AAA cells of unknown prior usage.



Beam photograph on a wall at ~10'.
Again, that white & blue color does not really exist.


Those colored graphics toward the left are my "Viva Piņata" posters, and that clock on the right that looks like a gigantic wristwatch is my Infinity Optics Clock.
You may also be able to see one of my SpongeBob SquarePants plush (Squidward Tentacles) and a Digimon plush (Greymon). Normally, a Patrick Star plush (from SpongeBob) would be hanging next to Squidward, but he was down here at the spectrometer for a test of his own.


Spectrographic analysis
Spectrographic analysis of the Blu-ray laser diode in this product.
Wavelength appears to be ~405nm, which is within specification for the type of laser diode used in this laser.


Spectrographic analysis
Same as above; but spectrometer's response narrowed to a band between 400nm and 410nm.
This shows that the wavelength is in fact 404.40nm.


Spectrographic analysis
Spectrographic analysis of the fluorescence of a uranated* glass marble when irradiated with this laser.

*"Uranated" - infused with an oxide of uranium, *NOT* tinkled (urinated) on.
Commonly referred to as "Vaseline glass" because it has
a distinct pale yellow-green color when not being irradiated.


Note spelling: "urAnated", not "urEnated","urInated",
"urOnated", "urUnated", or sometimes "urYnated".


Spectrographic analysis
Spectrographic analysis of the fluorescence of a piece of dark pink paper when irradiated with this laser.


Spectrographic analysis
Spectrographic analysis of the fluorescence of the phosphor cap of a Nichia NSPWR70CSS-K1 White High-Flux LED when when irradiated with this laser.

USB2000 spectrometer graciously donated by P.L.



ProMetric analysis
Beam cross-sectional analysis with beam widened (x-axis).



ProMetric analysis
Beam cross-sectional analysis with beam widened (y-axis).

These charts show the somewhat ovoid beam profile;
this is consistent with directly-injected diode lasers.

Images made using the ProMetric System by Radiant Imaging.






TEST NOTES:
Test unit was purchased on Ebay on 07-27-10 (or "27 Jul 2010" if you prefer), and was received at 3:33pm PDT on 08-02-10 ("02 Aug 2010").

I have decided to rate this wonderful little laser four stars!!!
If something happens down the road, I can always derate it if necessary.





UPDATE: 09-21-10
Measured power output with known-***NEW*** AAA cells: 25.10mW.





PROS:
Color is very radiant & unusual for a handheld laser
Uses inexpensive and readily available batteries
The price is right!
Color is very radiant an unu...o wait, I said that already!!!


CONS:
Just the usual suspects for laser modules/pointers - nothing that affects rating...actually, there is one little thing: it is advertised as a 5mW laser, but outputs over 15mW of laser radiation.
That's what lopped that last star off.


    MANUFACTURER: Unknown
    PRODUCT TYPE: Violet-emitting laser
    LAMP TYPE: Sony Blu-ray laser diode
    No. OF LAMPS: 1
    BEAM TYPE: Very narrow spot
    SWITCH TYPE: Momentary on/off button on barrel
    CASE MATERIAL: Brass
    BEZEL: Metal; laser & lens recessed into its end
    BATTERY: 2x AAA cells
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER- AND URANATION-RESISTANT: Light splatter-resistant at maximum
    SUBMERSIBLE: For Christ sakes NO!!!
    ACCESSORIES: None
    COUNTRY OF MANUFACTURE: China
    WARRANTY: Unknown/not stated

    PRODUCT RATING:

    Star Rating





5mW Violet Purple Blue Ray Blue Laser Module Pen *







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