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5mW 405nm Violet Purple Blue Beam Laser Pen, retail $8.43
Manufactured by: (Unknown)
Last updated 10-17-10
5mW 405nm Violet Purple Blue Beam Laser Pen, retail $8.43
Manufactured by: (Unknown)
Last updated 10-17-10
The 5mW 405nm Violet Purple Blue Beam Laser 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 49.590mW at exactly 405.0nm!!!
It comes in a handsome brass body with a black finish and chrome colored bezel, tailcap, and pocket clip.
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.
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, and set the front portion aside.
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.
***EXTREMELY IMPORTANT!!!***
This laser has a fair amount of {vulgar slang term for male nads} to it (measured at 49.590mW), 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.
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.
From somebody who knows their {vulgar slang term for caca; rhymes with "pit"} about lasers, comes this information:
More on 50-60 mW violet lasers:
The spot is not safe to stare into from close distances. At 60 mW,
assuming a perfectly diffuse-reflecting white wall and fully dilated
pupil, the spot is at borderline between Class I and Class II at a little
over 7 feet. This wavelength also has the extra ill effects of blue and
a bit of the ill effects of UV.
Usually a yellowish dye that naturally exists in the lens of the eye
significantly attenuates deep violet wavelengths. However, this is not
completely reliable. You probably do not want to stare at the violet spot
for more than a couple seconds from distances within a couple feet.
If the spot or your eyes keep moving, then things are OK.
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, electrically, and physically identical, so I was able to use its web page as a template for this one.
Beam photograph of this laser on the test target at 12".
Beam image bloomed ***SIGNIFICANTLY***.
I deliberately photographed this in daylight to help reduce image blooming!!!
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 rather hefty 49.590mW on a Sper Scientific Pocket Laser Power Meter # 840011 using known-new Duracell AAA cells.
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 Piñata 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 two of my SpongeBob SquarePants plush (Squidward Tentacles and Patrick Star) and a Digimon plush (Greymon).
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.
Same as above; but spectrometer's response narrowed to a band between 400nm and 410nm.
This shows that the wavelength is *EXACTLY* 405.0nm.
Spectrographic analysis of the fluorescence of a uranated* glass marble when irradiated with this laser.
Spectrographic analysis of the fluorescence of the 2009 NIA commemorative insulator in uranated* glass when irradiated with this laser.
* "Uranated" - infused with an oxide of uranium, *NOT* piddled (peed) 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".
USB2000 spectrometer graciously donated by P.L.
Beam cross-sectional analysis with beam widened (x-axis).
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 10-06-10 (or "06 Oct 2010" if you prefer), and was received at 4:21pm PDT on 10-16-10 ("16 Oct 2010").
I have decided to rate this wonderful little laser four stars!!!
UPDATE: 00-00-00
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 49mW 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:
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I have several other violet-emitting laser pens with the same type of body, and I am not able to remove their caps either. 
