RED KEYCHAIN LASER POINTER

Red Keychain Laser Pointer, retail $TBA
Manufactured by (Unknown)
Last updated 09-11-10




What this is is a small laser pointer that can be stuffed in your pocket or dangle from your keychain. It emits a red beam (measured spectrographically at ~665nm) with approximately 3.5mW of output power, and it includes the three LR44 button cells it feeds from.

It comes in a silvery-colored metal body, and looks somewhat like a large bullet.

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, ok?


SIZE



Press the button on the barrel and hold it down for as long as you want or need the laser beam, and release it to shut the unit back off.

Don't aim the laser at your face when you push the button, otherwise you might hit yourself in the eyes with the laser beam, and that wouldn't be very good at all. You would NOT be injured by a brief blast to the eyes, but try not to make a habit of it.



This laser pointer requires three LR44 button cells, which I believe are included in the package so you don't need to run to the store right away. To change them, unscrew and remove the tailpiece, dash it to the floor, and stomp on it with old or used bowling shoes...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Tip the open end of the laser pointer into your hand, and dispose of or recycle the three button cells that come out as you see fit.

Stack three new LR44 button cells on top of one another on a table, countertop, or other flat surface, button-end (-) negative facing up. Lower the laser pointer over this stack so all three cells are in the barrel. Slide the assembly to the edge of whatever surface you're reloading the pointer on, and place your finger over the laser pointer's opening as you slide it over the edge, so all those batteries don't just clatter to the floor. Invert (flip over) the laser pointer now, so the open end of the barrel faces up. Remove your finger. Screw the tailpiece back on, and be done with it.
Aren't you glad you didn't stomp on that tailpiece now?

Current usage measures 23.48mA on my DMM's 40mA scale.



Since laser pointers like this are not meant to be stomped on, run over, drowned in the commode, or otherwise abused, I will not inflict those sorts of punishments upon this one. So this section of the web page will be a bit on the bare side. :-/



Beam photograph on the test target at 12".
The artifacts in this photograph really do exist, but they are much dimmer in reality.
Measures 3.4941mW on a laser power meter specifically designed for this purpose.



Beam photograph on a wall at ~10'.

Those rectangular graphic things near the center are marquees from:
Midway ''Omega Race''
Sega ''Star Trek''
Williams ''Joust''
Venture Line ''Looping''
Universal ''Mr. Do!'s Castle''
Jaleco ''Exerion''
Gremlin/Sega ''Astro Blaster''
Atari ''Tempest''
Gottlieb ''Q*bert''

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


Spectrographic plot
Spectrometer plot of this laser.


Spectrographic plot
Spectrometer plot of this laser; newer spectrometer software & settings used.


Spectrographic plot
Spectrometer plot of this laser; spectrometer's response narrowed to a range between 650nm and 670nm to pinpoint wavelength; which appears to be ~664.80nm.

USB2000 spectrometer graciously donated by P.L.



ProMetric analysis
Beam cross-sectional analysis (X-axis).


ProMetric analysis
Beam cross-sectional analysis (Y-axis).

Image made using the ProMetric System by Radiant Imaging.






TEST NOTES:
Test unit of this laser pointer, two other lasers, and a flashlight were sent by a website fan and were received on 01-13-07.


UPDATE: 00-00-00



PROS:
Labelled properly with respect to power output & CDRH classification
Has sufficient power to do its job without going over that crucial 5mW limit


CONS:
Batteries it uses could be expen$ive and/or difficult to locate on short notice


    MANUFACTURER: Unknown
    PRODUCT TYPE: Keychain-style laser pointer
    LAMP TYPE: Directly-injected diode laser
    No. OF LAMPS: 1
    BEAM TYPE: Very narrow spot
    SWITCH TYPE: Momentary pushbutton on/off on barrel
    CASE MATERIAL: Metal
    BEZEL: Metal; aperture for laser beam to emerge
    BATTERY: 3xLR44 cells
    CURRENT CONSUMPTION: 23.48mA
    WATER RESISTANT: Light splatter-resistance at maximum
    SUBMERSIBLE: No
    ACCESSORIES: Swivel, split ring, "lobster claw" clasp, 3xLR44 button cells
    WARRANTY: Unknown

    PRODUCT RATING:

    Star RatingStar Rating





Red Keychain Laser Pointer *






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