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5mW 445nm-450nm Blue Laser Pen (2), retail $29.95
Manufactured by: (Unknown) for Lilly Electronics (www.lillyelectronics.com)
Last updated 04-07-14
Manufactured by: (Unknown) for Lilly Electronics (www.lillyelectronics.com)
Last updated 04-07-14
The 5mW 445nm-450nm Blue Laser Pen (2) (hereinafter, probably just called a "blue portable laser" or even just a "blue laser") is a royal blue-emitting, directly-injected diode laser. That is, it produces deep blue laser radiation directly, without the need for messy, fragile nonlinear crystals like those green laser pointers and the amberish-yellow and slightly greenish-blue ones as well. It uses a pair of AAA cells to feed its laser diode with.
This laser has a measured power output of 12mW at 446nm in the blue part of the spectrum.
This is the reason I call it a "portable laser" or "laser pen" on this website instead of a "pointer". Lasers designated as "pointers" must -- by US law anyway -- have a power output that does not exceed 5mW.
It comes in a handsome aluminum body with a black matte finish and brushed chrome-colored accents.
To get the laser to turn on, first load it with two AAA cells (see directly below), and THEN you can use it.
Aim the laser well-away from your face first.
To change the batteries in your blue laser, unscrew the laser at the halfway point, and set the front portion aside.
Tip the used AAA cells out of the barrel and into your hand, and dispose of or recycle them as you see fit.
Insert a pair of new AAA cells into the lower half of the barrel, nipple-end (+) positive first. This is the opposite of how batteries are installed in most flashlights, so please pay attention to polarity here!
Screw the two halves back together, and be done with it.
Unable to measure current (amperage) due to the way this laser was constructed.
The biggest downside to this laser is the fact that while this is clearly a CDRH Class IIIb laser (making it somewhat dangerous!!!), there are no safety features at all that are normally required in Class IIIb lasers; e.g., there is no "emissions" indicator, no startup delay, no interlock of ANY type, and no mechanical beam shutter. This laser behaves like a Class IIIa laser pointer in this regard, which I believe is a rather severe no-no!!!
There is a duty cycle reccomendation for this laser: 45 seconds on and 15 seconds off for cooling.
Does this laser look awfully similar to this one?
Thought that you'd say so.
That's because they're identical, both physically and electrically (except for battery polarity), so I was able to use its evaluation as a template for this one.
Beam terminus photograph of this unique (well, "not-so-unique" now) laser on the target at 12".
Beam image bloomed quite a bit Those white and purple colors doe not actually exist.
"Not no way, not no how" as they say.
Beam terminus photograph on a wall at ~10'.
Again, that white color does not really exist, and beam image bloomed somewhat.
Power output peaks at 12mW.
This test was conducted on a LaserBee 2.5W USB Laser Power Meter w/Thermopile.
Spectrographic analysis of this laser.
Spectrographic analysis of this laser; spectrometer's response narrowed to a band between 442nm and 452nm to pinpoint wavelength, which is 446nm.
The raw spectrometer data (comma-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/45/445-10.txt
Spectrographic analysis of this laser while it was operating below lasing threshold.
Spectrographic analysis of this laser while it was operating below lasing threshold; spectrometer's response narrowed to a band between 440nm and 455nm to pinpoint peak wavelength, which is 448nm.
The raw spectrometer data (comma-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/45/445-10bt.txt
USB2000 Spectrometer graciously donated by P.L.
A beam cross-sectional analysis would normally appear here, but my poor defenseless helpless innocent ProMetric 8 Beam Cross-Sectional Analyser that I use for that test was destroyed by a nearby lightning strike in mid-July 2013.
In leiu of the beam cross-sectional analysis, I present this photograph of the laser's beam terminus with the beam widened by a lens.
TEST NOTES:
Test unit was purchased on Ebay on 03-22-14 (or "2014 22 Mar." if you prefer) and was received on the afternoon of 04-04-14.
UPDATE: 00-00-00
PROS:
Color is very radiant & unusual for a pen-style handheld laser
The price is right!
Uses batteries that are common and relatively inexpen$ive
NEUTRAL:
CONS:
No laser warning labelling of any type -- that's what nocked ½ star off its rating
No safety features required of a CDRH Class IIIb laser -- this is what lopped another ½ star off
MANUFACTURER: Unknown
PRODUCT TYPE: Blue-emitting diode laser pen
LAMP TYPE: Unknown-type blue (450nm) laser diode
No. OF LAMPS: 1
BEAM TYPE: Very narrow spot
SWITCH TYPE: Momentary pushbutton on/off button on barrel
CASE MATERIAL: Aluminum
BEZEL: Metal; laser & lens recessed into a hosel for them
BATTERY: 2x AAA cells
CURRENT CONSUMPTION: Unknown/unable to measure
WATER-RESISTANT: Light splatter-resistant at maximum
SUBMERSIBLE: No!!!
ACCESSORIES: None
SIZE: 156mm L x 13mm D
WEIGHT: 70.70g (2.50 oz) incl. batteries
COUNTRY OF MANUFACTURE: Not stated; but very likely China
WARRANTY: Unknown/not stated
PRODUCT RATING:
Update 04-07-14: In leiu of the beam cross-sectional analysis, I furnished a photograph of the laser's beam terminus with the beam widened by a lens.
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