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Tag Archives: Lasers

OhGizmo Review Preview: Dragonlasers 250mW Spartan

Spartan Laser

By Evan Ackerman

Spartan LaserBack in October, I did a long review of Dragonlasers’ Hulk 250mW green laser. I guess it must have impressed someone over there, because I just got another test model in the mail… A different 250mW green laser called the Spartan. The biggest differences are the size (much smaller) and the fact that it uses rechargeable lithium batteries (yay!).

The Spartan laser is approximately the same power as the Hulk that I’ve already reviewed, so as far as burning stuff, you won’t be seeing any new lightsaber slice ‘n dice.. But that in no way means that I won’t be able to come up with some cool tricks for this review. I was hoping, though, that you guys might be able to post some suggestions as to what I should do with this thing, based on what you saw and liked about some of our previous laser reviews.

As before, I won’t be doing anything dangerous, expensive, catchably illegal, immoral, dumb, or boring. And I will be wearing serious eye protection, since Dragonlasers was kind enough to include some badass anti-laser goggles. That said… I’ll be having some fun, too.

Legal, safe fun, of course. Of course.

[ Dragonlasers Spartan GW 250mW ]

“Red Hot” Laser Light Show

Red Hot Laser Light Show (Image courtesy Edmund Scientifics)
By Andrew Liszewski

While it’s definitely red, I can’t vouch for how ‘hot’ this laser light show actually is. But anyone who goes to concerts just to see the awesome laser shows will be glad to know they can now enjoy a considerably more mediocre experience in the comfort of their own home. (And stop bleeding money to Ticketmaster.)

The device can be put into an ‘automatic’ mode where it will shine an assortment of random shapes across your walls and ceilings, but it also has a ‘sound responsive’ mode which will trigger patterns based on audio picked up by the internal microphone. It uses 4xAA batteries so you don’t have to worry about plugging it in and is available from Edmund Scientifics for just $24.95.

[ Red Hot Laser Light Show ]

U Michigan Creates Most Powerful Laser “In The Universe,” Has Obviously Not Heard Of Death Star


By Evan Ackerman

If, like I often do, you dream of holding up a magnifying glass the size of the planet Earth and using it to concentrate all of the sun’s energy onto a spot the size of a grain of sand, you’d just about duplicate the 300 terawatt intensity of the University of Michigan’s new HERCULES titanium-sapphire laser. For the record, 300 terawatts is 300 times the sustained capacity of the US electrical grid, and the only reason that we don’t notice our power being rerouted 300 days out of the year is that the HERCULES laser pulses only last a couple millionths of a billionth of a second and are concentrated onto an area about 1/100 the diameter of a human hair. Besides being totally awesome, HERCULES may help develop better proton and electron beams for radiation treatment of cancer. Scientists also think it could help them create fusion energy, and it might even be capable of “boiling the vacuum,” where a laser of sufficient intensity is able to “generate matter by merely focusing light into empty space.” Holy cow.

After the jump, see how HERCULES stacks up to the Death Star.Continue Reading

Laser Harp Is Frikkin’ Lasery

By Evan Ackerman

Laser harps aren’t, as far as I can tell, brand new tech, but you’ve got to admit, seeing a home built one in action is pretty cool. The principle is deceptively simple; a reflection sensor watches the beams, and when one is interrupted, it signals a MIDI routine to produce a tone. Sliding your hand up and down the beam can bend notes, or do anything else that you feel like encoding into the MIDI protocol. So, yeah, the music is great and all, but I think the best part of the video is the shutdown sequence at the very end. Hey, I wonder if he takes requests… How about Flight of the Bumblebee? No, wait! Free Bird!!!

If you want to build one yourself, it’s possible with some know-how, check out the website. Oh, and click here to watch an absolutely adorable video of how the harp works.

[ Stephen Hobley’s Laser Harp ] VIA [ Hacknmod ]