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DIRECTLY-INJECTED 515nm GREEN
LASER PEN

Directly-Injected 5mW 515nm Green Laser Pen, retail $75.00
Manufactured by (Unknown)
Last updated 07-10-14

This is a green-emitting diode laser in a pen-style body.

But it's not DPSS (Diode-Pumped Solid State) like those now-common green laser pens -- no, this one uses a new technological advancement that allows green laser radiation to be produced directly, without the need for those messy, fragile nonlinear crystals!

This is the first of these green lasers to have been mass-produced in a totally self-contained "pen" format -- that I'm aware of anyway.

It's rated to produce 5mW of laser radiation at 515nm in the bluish-green part of the spectrum (these values were measured at 8mW with a wavelength of 517.880nm).

Because this is a laser, you should not shine it into your eyes, other people's eyes, pet's eyes, etc. Just use a little common sense here, k?

Size of product w/hand to show scale

SIZE

To use your shiny new (and yes, as of early-2014 this technology is SHINY NEW and not CORRODED OLD!

) Directly-Injected 515nm Green Diode Laser Pen, insert the furnished cylindrical interlock key into the keyway for it in the tailcap (rotate it as necessary until you feel it go in), turn it clockwise (as though tightening it) until it stops, and then pull it straight out. This "arms" the laser.

Press & hold down the button on the barrel for as long as you need the laser spot. A red "emissions indicator" LED will turn on; it is located immediately forward of the switch button. Release the button to turn the portable laser back off. Yes, it really is as easy as that.

If you wish, you may totally neutralise the laser by inserting the furnished cylindrical interlock key into the tailcap (rotate it as necessary until you feel it go in), turn it counterclockwise (as though loosening it) until it stops, and then pulling it straight out. Doing this disables the laser completely, so that it may not be activated even when new batteries are in place.

Photograph showing the cylindrical key, the keyway in the laser's tailcap, and the indicator dots on the tailcap.

To change the batteries in this laser, unscrew & remove the tailcap, and set it aside.

Tip the used AAA cells out of the barrel and into your hand, and dispose of, recycle, or recharge them (rechargeable cells only!!!w) as you see fit. Do not under any circumstances flush them down a toliet or throw them into a trout-filled stream.

Insert two new AAA cells into the barrel, nipple-end (+) positive first. This is the opposite of how batteries are installed in most laser pens, so please pay attention to polarity here.

Screw the tailcap back on, and be done with it.

Above threshold, current consumption measures 261.30mA on my DMM's 400mA scale.
Below threshold, current consumption measures 45.50mA on my DMM's 400mA scale.

This is a pen-style portable laser, not a flashlight meant to be thrashed, trashed, and abused. So I won't try to drown it in the toliet tank, bash it against a steel rod or against the concrete floor of a carport in effort to try and expose the bare Metalmarineangemon - er - the bare Metaltrailmon - um that's not it either...the bare Metalsusanoomon...er...uh...wait a sec here...THE BARE METAL (guess I've been watching too much Digimon again!

- now I'm just making {vulgar term for feces} up!!!), let my mother's big dog's ghost, her kitties, my kitty or my sister's kitty cat piddle (uranate) on it, hose it down with my mother's gun, run over it with a 450lb Quickie Pulse 6 motorised wheelchair, stomp on it, use a medium ball peen hammer in order to bash it open to check it for candiosity, fire it from the cannoñata, drop it down the top of Mt. Erupto (now I guess I've been watching the TV program "Viva Piñata" too much again

- candiosity is usually checked with a laser-type device on a platform with a large readout (located at Piñata 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 cannoñata (also located at Piñata Central) is only used to shoot piñatas to piñata parties away from picturesque Piñata Island, and Mt. Erupto is an active volcano on Piñata Island), send it to the Daystrom Institute for additional analyses, or perform other indecencies on it that a flashlight might have to have performed on it. Therefore, this section of the Directly-Injected 515nm Green Diode Laser Pen's web page will seem a bit more bare than this section of the web page on a page about a flashlight.

The Directly-Injected 515nm Green Diode Laser Pen is not water-resistant or submersible (it's a laser pen for Christ sakes!!!), so please keep it away from water.

The published specs on this laser pen are as follows:

Emission Wavelength: 515nm
M2: <1.20
Beam divergence: <2.0 mrad
Beam diameter at aperture: <1.50mm
Warmup time: <30 sec.
Transverse Electromagnetic Mode: TEM₀₀
Operation Temperature Range: 50°F (+10°C) to 86°F (+30°C)
Storage Temperature Range: 14°F (-10°C) to 122°F (+50°C)
Operating Current: <265mA
Operating Voltage: +3.0 volts DC

Below, you'll find my power output and spectrographic findings (both measured with instruments specifically designed for this purpose).

Power output measurement

Power output peaks at 8mW.
Batteries for this analysis were purchased just before the test.

Power output measurement

Using known-new Energizer L92 lithium AAA cells.
Power output peaks at 15mW.

These tests were conducted on a LaserBee 2.5W USB Laser Power Meter w/Thermopile.

I later measured a power output of 4.4625mW on a Sper Scientific Pocket Laser Power Meter # 840011.

Beam terminus photograph on the test target at 12".
Beam image bloomed quite a bit; it also shows a lot of white that doen't exist in the actual beam.

Beam terminus photograph on a wall at ~15 feet.
As with the above photo, the beam image bloomed quite a bit; it also shows a lot of white that doen't exist in the actual beam.

Beam terminus photograph on a wall at ~15 feet.
As with the above two photographs, the beam image bloomed quite a bit; it also shows a lot of white that doen't exist in the actual beam.

Beam terminus photograph on the side of an uninhabited structure located ~275 feet (~83.82M) away.
The albedo of this structure is somewhere between 92 and 95.

Beam photograph in moderate fog.
Photo was taken at 6:40am PST on 02-02-14.

Beam terminus photographs (while the laser was deliberately being moved) in freshly-fallen snow.
Photographs were taken on the morning of 02-09-14 in Federal Way WA. USA.

Beam terminus photograph on a white wall comparing this laser with the 532nm 5mW Blue (Green-Emitting) Laser Pen.
This laser is the rightmost spot.

Beam terminus photograph on freshly-fallen snow comparing this laser with the 532nm 5mW Blue (Green-Emitting) Laser Pen.
This laser is the topmost spot.

Another beam terminus photograph on a white wall comparing this laser with the 532nm 5mW Blue (Green-Emitting) Laser Pen.
This laser is the leftmost spot.

Attempted macro photograph showing the mandated CDRH label.

Photograph showing that the unit still emits light when you think it's off.

Current usage in this quiescent mode (when the laser should be totally off) was measured at 1.40mA on my DMM's 400mA scale.

Video on YourTube showing the laser's beam terminus spot of the Directly-Injected 5mW 515nm Green Laser Pen being projected onto freshly-fallen snow while the laser itself was being waved about.

VERY IMPORTANT!!!
This video shows what appears to be a dashed line when the laser is being moved. This is due to how the camera records video; in reality, the line is continuous and unbroken!

O BOY!
A green laser being shone onto snow!
So thrilling!!
So heart-stopping!!!
Actually, it kinda makes you want to "kik" "thuh" "spiget" "oph" "thuh" "wal" "uv" "uh" "bathetube" "ahnd" "woch" "thuh" "wattor" "schute" "acros" "thuh" "rume" doesn't it?

This video is 142.0947831628 megabytes (142,433,138 bytes) in length; dial-up users please be aware.
It will take no less than seven hundred ten minutes to load at 48.0Kbps.
This video is definitely ***NOT*** dial-up friendly!!!

Spectrographic analysis of this laser.

Spectrographic analysis of this laser; spectrometer's response narrowed to a band between 510nm and 520nm to pinpoint wavelength, which is 517.880nm.

Spectrographic analysis of this laser; spectrometer's response narrowed to a band between 800nm and 874nm to check for the presence of a pump laser -- which none exists (I irradiated the spectrometer's sensor quite well in effort to capture this!)

Spectral line halfwidth (FWHM) analysis (using the data that's available directly below) shows that the FWHM is 1.390nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/44/515point.txt

Spectrographic analysis of this laser after burning two sets of batteries through it; spectrometer's response narrowed to a band between 515nm and 525nm to pinpoint wavelength, which is 518.220nm.

Spectral line halfwidth (FWHM) analysis (using the data that's available directly below) shows that the FWHM is 1.380nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/45/515poin2.txt

Spectrographic analysis of this laser below lasing threshold.

Spectrographic analysis of this laser below lasing threshold; spectrometer's response narrowed to a band between 522nm and 542nm to pinpoint wavelength, which is 531.660nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/45/bt515poi.txt

Spectrographic analysis of this laser when it is "off".

Spectrographic analysis of this laser when it is "off"; spectrometer's response narrowed to a band between 522nm and 542nm to pinpoint wavelength, which is 530.290nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/45/of515poi.txt

USB2000 Spectrometer graciously donated by P.L.

Power output in this below-threshold state was measured at 19.830µW (that's microwatts)

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 a beam cross-sectional analysis, I present to you this photograph that shows the ovoid beam profile, which is characteristic of a diode laser -- this clearly shows that it has fast and slow axes.

The distortion along the fast axis was caused by the lens used to widen the beam; it was not properly affixed to the laser's aperture and as a result, it was tilted somewhat. This does not significantly distort the actual beam image, and may safely be ignored in this case.

Video on YourTube showing what happens when this laser irradiates the fibers and the white wall BEHIND the fibers of my Fiber Optic Vibrating Light.

This video is approximately 186.267379043433 megabytes (186,713,424 bytes) in length; dial-up users please be aware.
It will take no less than nine hundred thirty one minutes to load at 48.0Kbps.

This video is definitely ***NOT*** dial-up friendly!!!

This brief video demonstrates what happens when you attempt to operate the Directly-Injected 5mW 515nm Green Laser Pen with batteries that are pooped out.

This video is 73.4420008745 megabytes (73,775,436 bytes) in length; dial-up users please be aware.
It will take no less than three hundred sixty seven minutes to load at 48.0Kbps.

TEST NOTES:
Test unit was purchased on Ebay on 01-10-14, and was received at 3:51pm PST on 01-28-14.

UPDATE: 07-10-14
I just took note that this laser was custom-manufactured for me.

A label near the tailcap has the following data printed on it:

LEDSaurus LP515-5B
S/N: 1401211103

PROS:
Very unique beam color -- 518nm is very radiant and unusual
Beam is clean with no unwanted artifacts or speckling in it

NEUTRAL:

CONS:
Power output drops sharply when unit is exposed to cold (or even cool) temperatures

Unknown

Pen-style portable laser

Directly-injected green-emitting diode laser, red LED "emissions" indicator

2 (1 ea. laser diode & LED)

Very narrow spot -- it's a laser, remember?

N/A

Momentary pushbutton on/off on barrel

Metal

Metal; laser diode & collimating lens recessed into hosel for them

2 x AAA cells

261.30mA (above threshold), 45.50mA (below threshold)

¡¡¡SATANÁS USANDO UN PAÑAL DESECHABLE EMPAPADO EN ORINA, NO!!!

Interlock key, hard-sided storage case

193mm L x 14.50mm Dia.

85.10g (3.00 oz.) incl. batteries

Unknown/not stated

1 year

Directly-Injected 5mW 515nm Green Laser Pen *

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