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COMPARISONS OF INEXPEN$IVE
BLU-RAY (VIOLET) LASER PENS

On this web page, you'll see informal comparative analyses of those inexpen$ive Blu-ray (violet-emitting) laser pens. This will include the following information about each laser: Cost (in US$), power output and wavelength, construction notes (engraved pocket clip, barrel construction, etc.) plus any characteristic(s) about them that make them better or worse than others. I realise that the previous will be rather subjective, but it might be something to think over.
All but this one and this one use two AAA cells -- this is a pretty universal power source for "pen-style" lasers.
Beam quality and diameter are extremely similar from unit-to-unit, and none of them are focuseable.

So, without further adoo, let's get this show on the road, shall we?

50mW 405nm Handheld Ultra Powerful Violet Purple Blue Laser Pen 1010 (1×CR123A)
Cost: $18.09
Advertised power output: 50mW
Measured power output: 36mW
Wavelength: 403.920nm
Construction notes: Uses a CR123A lithium cell (which is installed backward in my particular unit). Product looks more like a mini flashlight than a portable laser, black matte body
Label color: Red
Seller: DinoDirect
Date of purchase: 06-07-11; reverse battery polarity was not discovered until 12-10-11 which was when evaluation took place.

5mW Violet-Emitting Laser Module
Cost: $10.88
Advertised power output: 5mW
Measured power output: 9.610mW
Wavelength: 404.550nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Red
Seller: DealExtreme
Date of purchase: 09-16-09
Nothing unusual about this one -- pretty run-of-the-mill stuff here.

5mW Violet Laser Module w/"Constellation" Lens
Cost: $12.24
Advertised power output: 5mW
Measured power output: 44.60mW
Wavelength: 403.45nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body; removeable holographic optic
Label color: Blue
Seller: Ebay find
Date of purchase: 07-06-10
This one has a holographic "stars" optic that can be rotated through a full 360° on its X-axis; this gives hundreds of different "star" patterns.

5mW Violet Laser Module
Cost: $10.88
Advertised power output: 5mW
Measured power output: 61.470mW
Wavelength: 408.19nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Blue
Seller: Ebay find
Date of purchase: 07-12-10
Nothing unusual about this one -- pretty run-of-the-mill stuff here.

5mw Blue/Purple Laser Module
Cost: $9.50
Advertised power output: 5mW
Measured power output: 57.90mW
Wavelength: 406.40nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Blue
Seller: Ebay find
Date of purchase: 07-18-10
Same as above -- nothing unusual about this one.

405nm 5mW Violet Purple Blue Ray Blue Laser Module Pen
Cost: $7.86
Advertised power output: 5mW
Measured power output: 15.80mW
Wavelength: 404.40nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Purple
Seller: Ebay find
Date of purchase: 07-27-10
Same as above -- nothing unusual about this one. Color of warning label is different anyway.

405nm 5mW Violet Laser Module Pen
Cost: 99¢
Advertised power output: 5mW
Measured power output: 30.840mW
Wavelength: 402.92nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Blue
Seller: Ebay find
Date of purchase: 08-10-10
No other outstanding differences here.

405nm 5mW Violet Laser Module Pen (2)
Cost: $2.90
Advertised power output: 5mW
Measured power output: 49.950mW
Wavelength: 405.00nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Blue
Seller: Ebay find
Date of purchase: 08-11-10
Again, no other outstanding differences here.

5mW 405nm Violet Purple Blue Beam Laser Pen
Cost: $2.90
Advertised power output: 5mW
Measured power output: 47.61mW
Wavelength: 407.90nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Blue
Seller: Ebay find
Date of purchase: 10-06-10
Once again, no other outstanding differences here. Like most on this web page, it appears to be extremely similar to other ones, as though it had come off a cloning machine.

Mini Purple Class Laser Beam Black Keychain
Cost: $7.99
Advertised power output: 5mW
Measured power output: 23.110mW
Wavelength: 401.10nm
Construction notes: Shorter than other "pen-style" lasers; no pocket clip (has keychain attachment though)
Label color: Red
Seller: Ebay find
Date of purchase: 10-06-10
I really like this one mainly because of its form factor -- it uses one AAA cell instead of two, subsequently making it significantly smaller than other "cheapie" Blu-ray lasers.

405nm 5mW Violet Purple Blue Beam Laser Pen
Cost: $10.66
Advertised power output: 5mW
Measured power output: 57.30mW
Wavelength: 405.00nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: N/A
Seller: Ebay find
Date of purchase: 10-06-10
This one has no CDRH-mandated laser warning label; all lasers sold in the US must have one.
Otherwise appears very similar to the other 2xAAA cell pens on this web page.

10mW Blue-Violet Laser Pen
Cost: $8.99
Advertised power output: 10mW
Measured power output: 75.50mW
Wavelength: 405.70nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Blue
Seller: Amazon.com (www.amazon.com...)
Date of purchase: 02-04-11
The highest power output of the non-modified "pen-style" lasers in my custody.
Otherwise fairly unremarkeable.

Violet Purple Blu-ray Laser Pen (1)
Cost: $2.99
Advertised power output: 10mW
Measured power output: 22.50mW
Wavelength: 404.95nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Purple
Seller: Ebay find
Date of purchase: 02-04-11
Nothing outstanding here folks.

Violet Purple Blu-ray Laser Pen (2)
Cost: $5.55
Advertised power output: 5mW
Measured power output: 53.50mW
Wavelength: 405.65nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Blue
Seller: Ebay find
Date of purchase: 02-20-11
Nothing that sets it apart from the pack.

Violet Purple Blu-ray Laser Pen (3)
Cost: $6.65
Advertised power output: 5mW
Measured power output: 53.70mW
Wavelength: 404.65nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: Blue
Seller: Ebay find
Date of purchase: 03-20-11
Again, nothing different about this laser than most of the others here.

Blu-ray Laser Pen
Cost: $(Not known)
Advertised power output: 5mW
Measured power output: 64.20mW
Wavelength: 405.00nm
Construction notes: Reads "Laser Pointer" on clip; recessed shallow "dimples" on lower half of barrel, matte silver tailcap, black matte body
Label color: None
Seller: Sent by a website visitor
Date of purchase: 05-04-11
Again, nothing different about this laser than most of the others here.

Do you manufacture or sell an LED flashlight, task light, utility light, or module of some kind? Want to see it tested by a real person, under real working conditions? Do you then want to see how your light did? If you have a sample available for this type of real-world, real-time testing, please contact me at ledmuseum@gmail.com.

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