300mW 780nm DIODE LASER MODULE

300mW 780nm Diode Laser Module, retail $59.99
Manufactured by (Unknown)
Last updated 12-24-08




This is a diode laser module that has a power output of 300mW pulsed and 200mW CW (continuous wave), and is advertised to have a peak wavelength of 780nm - (the one I got has a peak wavelength of 785.1nm as measured spectrographically; this is *WELL* within spec!).

It comes in a metal body, and the focus is easily adjustable without tools from a tightly focused pinpoint to a narrow-medium spot.

With the CW driver that is included free if you ask for it, input voltage is +6 to +12 volts, from any source that can supply 250mA or more.


Size of product w/hand to show scale SIZE



To power up this module (this is for the CW driver that I requested):

Go set fire to the playpen* first.

* I guess I've been listening to the Worm Quartet song "Let's Break some Furniture" too much lately.

"...Throw the loveseat down the stairs, take an axe to all the chairs, soon we won't have nowhere to sit..."
"...We'll make that Lazy Boy go down with just a couple of whacks"..."let's see if that Scotchguard can protect it from an axe..."
"...They're threatening to go on Sally Jesse Raphael+, so she'll send me to boot camp where they'll beat me till I'm well..."
"...My parents have so much to learn about young growing boys, if you don't want your stuff trashed then buy me cooler toys..."
"...Now we've shredded every ottoman the counter's cut in three, the dining table's burning and the chairs are soaked with pee..."
"...My sister's futon stares at me I swear I heard it laugh, let's see if it still chuckles when it's {toliet word censored} cut in half..."
"...There's mommy's little table lined with rings perfume and pearls, let's cut it into little bits & force-feed it to squirrels..."
"...There's nothing left to break here so cummon let's go to Sears (and break some furniture, let's break some furniture)..."
"...Your little coffee table's now a little pile of sticks (let's break some furniture, let's break some furniture)..."
"...We're not making a statement no we're just a bunch of pricks (let's break some furniture, let's break some furniture)..."
"...That recliner may be on wheels but it can't get away (let's break some furniture, let's break some furniture)..."
"...I don't know what a credenza is let's break one anyway (let's break some furniture, let's break some furniture)..."
"...That ottoman, it looks so smug that I just gotta pound it (let's break some furniture, let's break some furniture)..."
"...Tell the security guy that it was like that when we found it (let's break some furniture, let's break some furniture)..."

Neither Worm Quartet nor myself advocate destroying furniture; that {vulgar term for feces} is expensive.


This is Worm Quartet...one guy (Reverend Shoebox) and three worms.

+If you didn't know, Sally Jesse Raphael had a TV talk show in the late 20th century; one of her recurring themes was "Sally's Boot Camp" where parents who were guests on the program could send their unruly teenaged children in order to get them to "straighten up & fly right". Sally was most recognisable by her red-framed eyeglasses.

Now I'm going off on a tangent here - let's see if I can put this choo-choo train back on the tracks...
  1. Connect it to any source of 6 to 12 volts DC that can sink at least 0.25A (250mA).
  2. White wire is (+) positive, black wire is (-) negative.
  3. If you wish to have an on/off switch, you'll have to procure it elsewhere and connect it between one of the power supply terminals and the laser's matching power supply wire.
This laser module has a focusable beam.
To change the focus, turn the black ring at the end of the bezel (the laser's "business-end") to achieve the desired beam width. If you unscrew it too far, it will fall off - and if you aren't paying attention, a spring could shoot out as well. If this has occurred, just place the spring back in the laser's barrel, and screw the lens assembly back on at least two full turns from the time it "catches".



This laser can use *ANY* source of DC power between 6 and 12 volts that can supply at least 250mA, so this section really isn't needed here.

Current usage measures 174mA when powering it from two CR123A cells in series (open-circuit voltage just over +6 volts).
This measurement was taken on my DMM's 4A scale to help minimise shunt resistance error.



This is a laser, not a flashlight. So I won't do the smack test on it. I know you love to see me break things, but it "ain't" "gonna" happen today, folks. So I won't throw it against the wall, stomp on it, try to drown it in the toylet bowl or the cistern, run over it, swing it against the concrete floor of a patio, use a small sledgehammer 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), 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 {In the episode "Les Saves the Day...Again", Paulie Preztail says "Hey, ever wonder why this park's called 'Mount Erupto' anyway?", then Franklin Fizzlybear says "I think its an old native term. Means 'very safe.'"}), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that flashlights may have inflicted upon them. So this section of the laser module's web page will seem ***SIGNIFICANTLY*** more bare than this section of the web page on a page about a flashlight that was born to be a flashlight and nothing but a flashlight.


Power output analysis
Power output measures 150mW on a LaserBee 2.5W USB Laser Power Meter w/Thermopile.



Beam photograph on the test target at 12".
The yellow & white color does not actually exist; the beam spot appears a very dull, dim cherry red to the unaided eye.

Power output is far too high to measure with the instruments at my disposal.



Beam photograph on a wall at ~10 feet.
Red arrow points to where beam spot is.

Those rectangular graphic things in the upper right quadrant of this photograph (though you may not actually *SEE* them!) are marquees from:

Sega ''Star Trek''
Atari ''Tempest''
Venture Line ''Looping''
Jaleco ''Exerion''

upright coin-op arcade video games from the 1980s.


WMP movie (.avi extension) showing the product burning a mousepad.
This clip is approximately 1.880 megabytes (1,925,138 bytes) in length; dial-up users please be aware.
It will take no less than eight minutes to load at 48.0Kbps.
I cannot provide it in other formats, so please do not ask.


Spectrographic analysis
Spectrographic analysis of this laser module.


Spectrographic analysis
Spectrographic analysis of this laser module; spectrometer's response narrowed to a band between 770nm and 790nm.
As you can see, this laser's peak output is at 785.1nm.


Spectrographic analysis
Spectrographic analysis of this laser module; newest (03-25-12) spectrometer software settings used.


Spectrographic analysis
Spectrographic analysis of this laser module; newest (03-25-12) spectrometer software settings used. Spectrometer's response narrowed to a band between 780nm and 790nm to pinpoint wavelength, which is nm.
As you can see, this laser's wavelenth is 785.777nm.

USB2000 spectrometer graciously donated by P.L.


Beam cross-sectional analysis
Beam cross-sectional analysis with beam widened (fast {X} axis).


Beam cross-sectional analysis
Beam cross-sectional analysis with beam widened (slow {Y} axis).

That dark spot to the left of center that queered both of these tests is a defect in the ProMeteric's CCD imager that cannot be compensated for.

Images made using the ProMetric System by Radiant Imaging.





TEST NOTES:
Test unit was purchased on Ebay on 11-19-08, and was received on the morning of 11-26-08.

Since its peak output wavelength was spectrographically measured at 660.6nm and this is being sold as a 780nm module, there is a rather high chance that I was sent the incorrect module by mistake.


UPDATE: 11-29-08
It was made known to me by the seller that he did indeed send the incorrect module - a simple, honest mistake.
When the correct module arrives, I will be making a new web page for it.

In fact, I might just rename it "660.htm" and start a new one for this laser so there is no chance of confusion.


UPDATE: 12-23-08
The correct laser was received on 12-21-08; that is what is shown on *THIS* web page.





PROS:



CONS:



    MANUFACTURER: Unknown
    PRODUCT TYPE: Diode laser module
    LAMP TYPE: Diode laser
    No. OF LAMPS: 1
    BEAM TYPE: Adjustable from pinpoint to narrow-medium spot
    SWITCH TYPE: N/A
    CASE MATERIAL: Metal & plastic
    BEZEL: Metal; laser diode recessed inside
    BATTERY: N/A
    CURRENT CONSUMPTION: 174mA at 6 volts
    WATER- AND PEE-RESISTANT: No
    SUBMERSIBLE: NO WAY HOZAY!!! way Hozay!!!
    ACCESSORIES: CW driver circuit
    WARRANTY: Unknown/not stated

    PRODUCT RATING:

    Star Rating





300mW 780nm Diode Laser Module *






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