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Review of the Cyan 488nm Directly-Injected Diode Laser Pen

The LED (& Laser) Museum

Active member
Joined
Jul 18, 2023
Messages
114
Points
28
Cyan 488nm Directly-Injected Diode Laser Pen, retail $65.00

Last update: 10-19-23
Manufactured by (unknown)

ldRcMaX.jpg


This is a 488nm cyan (greenish-blue) directly-injected diode laser pen that is designed to output approx. 50mW. It is made primarily from brass, covered with what I believe is a black baked enamel finish.


Feed the laser pen a pair of AAA cells first, and then you'll be ready to rock.

To use the laser pen, just aim it at something you wish to point out, and press & release the button on the tailcap. Press and release it again to neutralise the laser pen.


To change the batteries in this laser, unscrew 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 as you see fit. Please do not under any circumstances flush them down a toliet or throw them into a salmon-filled stream or those tree-huggers might hunt you down and then beat the living tweedle out of you. :)

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

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



This is a laser pen, not a flashlight meant to be carried around, thrashed, trashed, and abused, so I won't try to drown it in a toliet tank, run over it with a 450lb Quickie Pulse 6 motorised wheelchair, stomp on it, 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. So this section of the web page will be a bit more bare than this section of the web page on a page about a flashlight.


This laser is not water-resistant, so please be extra careful when using it around sinks, tubs, toliet bowls, fishtanks, pet water dishes, or other places where water or water-like liquids might be found. And you'll probably want to cover it up or otherwise get rid of it (such as by putting it in a pocket or bag) if you need to use it in the rain or snow.

There are no current usage, optical power output measurements or spectrographic analyses because I no longer own or have access to a DMM, LPM, or spectrometer...As an indirect result of the stroke I fell prey to on 03-21-22, I no longer own or have access to a spectrometer or even a spectroscope.

I was not able to measure wavelength with a diffraction grating and a meter stick because there is insufficient space here, and an outdoor measurement is not possible because I'm in a wheelchair after falling prey to a crippling stroke on 03-21-22 and my physical ability to measure with a meter stick is extremely limited at best.


XKn2loU.jpg

Beam terminus photograph on a wall at ~8 feet.
The pic was replaced to get rid of the plastic uranator jugs as I was receiving complaints about them.


WUSgTAp.jpg

Beam bouncing off of a standard 2nd-surface household mirror at ~5 feet.
Incense was burning nearby, and an episode of Cash Cab was on the telly.


Flunky switch on my 488nm laser pen; note how the laser power varies quite dramatically.
An episode of Star Trek Voyager was playing on the telly; the sound may safely be ignored or muted if it piddles you off.


TEST NOTES
Test unit was purchased from Ebay i n late-August 2022.


UPDATE 10-15-23
Added a video that shows the results of the flunky power switch.


PROS:
Color is extremely radiant and unuusual for a portable laser
Nice beam quality -- beam is exceptionally clean with no unwanted "nasties" (artifacts) in it
Uses batteries that are common and relatively inexpen$ive
Appears significantly brighter than expected



NEUTRAL:

Not waterproof or submersible - but most lasers aren't. Will not figure into my rating



CONS:
Pushbutton switch feels a bit flunky (it has since day one)


  • MANUFACTURER: Unknown
  • PRODUCT TYPE: "Pen"-style portable laser
  • LAMP TYPE: Directly-injected greenish-blue-emitting laser diode
  • No. OF LAMPS: 1
  • BEAM TYPE: Very narrow spot
  • REFLECTOR TYPE: N/A
  • SWITCH TYPE: "Clickie" on/off button on tailcap
  • CASE MATERIAL: Metal
  • BEZEL: Metal; laser diode and collimating lens recessed into deep hosel for them
  • BATTERY: 2x AAA cells
  • CURRENT CONSUMPTION: Unkown/unable to measure
  • WATER- AND DIET MOUNTAIN DEW-RESISTANT: No
  • SUBMERSIBLE: No Way Hozay!
  • ACCESSORIES: None
  • SIZE: 650mm L x 6.5mm Ø (Dia.)
  • WEIGHT: Unable to weigh
  • COUNTRY OF MANUFACTURE: Unknown; though probably China
  • WARRANTY: Unknown

PRODUCT RATING:

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Last edited:





Joined
Sep 20, 2013
Messages
17,462
Points
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Sorry for the late reply. Congrats on your new acquisition. I did enjoy your review. I have put together several of these Sharp diodes into lasers for other people, but that was back when these diodes first immerged. ;)
 

The LED (& Laser) Museum

Active member
Joined
Jul 18, 2023
Messages
114
Points
28
Sorry for the late reply. Congrats on your new acquisition. I did enjoy your review. I have put together several of these Sharp diodes into lasers for other people, but that was back when these diodes first immerged. ;)
Thank you for your compliments on my review!!! :cool:
I don't know who the manufacturer of the laser diode in this unit is.

"immerged" -- that's a funny word; I've never seen it before. ;)
 




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