Boing Boing » lasers

Homemade laser pops 100 balloons

Cory Doctorow — Fri, 03 May 2013 14:32:41 +0000

Scott A. Stevenson modded a Blu-ray laser flashlight to run at 500mW and used it to pop 100 black balloons. For science!

100 black balloons vs. Blu-ray laser! It is all over in under 8 seconds. The sound they make as they pop is a bit mesmerizing! Note: The laser used in this video is custom made from a flashlight body and the laser diode from a 12X speed Blu-ray burner drive and not purchased in a store or online.

Laser Videos by WorldScott.com (via Geekologie)

Laser on ship shoots down drone

David Pescovitz — Thu, 11 Apr 2013 17:12:00 +0000

Above is a US Navy demonstration of a high-energy laser on a moving ship shooting down a drone. The Office of Naval Research just announced that they plan to deploy the system next year. "Our conservative data tells us a shot of directed energy costs under $1," Chief of Naval Research Rear Adm. Matthew Klunder said. "Compare that to the hundreds of thousands of dollars it costs to fire a missile, and you can begin to see the merits of this capability." (Navy.mil)

Teen who pointed laser at aircraft jailed for 30 months

Rob Beschizza — Wed, 27 Mar 2013 13:45:54 +0000

CNN's Aaron Cooper reports on the consequences for aiming laser pointers at aircraft.

U.S. District Judge Stephen V. Wilson sentenced a 19-year-old man on Monday to 30 months in federal prison for shining a laser pointer at a plane and police helicopter, according to a news release from the U.S. Attorney's Office, which prosecuted the case.

Homebrew Nintendo laser zapper is powerful, awesome

Xeni Jardin — Tue, 25 Sep 2012 16:31:36 +0000

"The plan was simple. Take a nostalgic NES "duck hunt" Zapper, and retrofit it with a ridiculously powerful laser."

A project from North Street Labs. In case it's not obvious, this is dangerous, and could lead to death or blindness without safety precautions.

Components: "2.1A input buck driver, 2x 750mAh 35-70c Lipo batteries, M140 445nm diode, G2 lens. homemade custom heat-sink, turn key safety switch."

Learn how to build your own, here. But remember, kids, always wear protective safety goggles. And, wear the right kind for the laser you're working with. [Video Link].

Playing "Still Alive" with a fiber laser and a piece of stainless steel

Cory Doctorow — Wed, 21 Mar 2012 13:00:11 +0000

Chjade84 convinced an Automated Laser Corporation 20 watt fiber laser to play "Still Alive," Jonathan Coulton's epic anthem for Valve's video-game Portal; as a lagniappe, the laser performs this feat while carving ~~Valve's~~ Aperture Science's logo into a stainless steel plate.

There has been a lot of interest in these stainless plates with the Aperture logo (thanks!). I've sent a few emails to Valve asking for their permission to make them for you - it is their logo after all. If you want to be kept in the loop send me a message and I will keep you informed (probably $20-$30 shipped -- stainless ain't cheap!). Thanks again!

Portal's 'Still Alive' Played by Fiber Laser (Thanks, Alan!)

Laser sintering explained

Cory Doctorow — Mon, 14 Nov 2011 20:32:46 +0000

Here's a great little video explaining laser-sintering, the process by which some 3D printers do their magic -- melting fine powders, bit by bit, into 3D shapes.

How Laser Sintering Works

Space lasers

Maggie Koerth-Baker — Mon, 24 Oct 2011 17:35:18 +0000

Removing Orbital Debris with Lasers. How's that for a great research paper title?

Most of you are probably aware of the existence of space trash—that collection of disused satellites, lost tools, spent rocket boosters, and various other flotsam that is starting to become a physical hazard to the objects we actually want circling the globe in Low Earth Orbit. Currently, we get around the problem (mostly) by attaching bumpers to spacecraft and to the ISS. But there are lots of different ideas for how we could deal with the problem of space junk in a more proactive way.

The team of private and government scientists who wrote this paper want to aim lasers at space junk. But not like you're thinking. Instead of blowing up our trash in a life-size game of Asteroid (something that would really only succeed in creating a lot more, smaller pieces of space junk) the team wants to use laser pulses to alter the momentum of large pieces of junk, slowing those pieces enough that they fall out of orbit and back to Earth.

Such a system could be used to precisely time the reentry of dead satellites and other junk, ensuring that when chunks of metal fall out of the sky they won't be falling on any densely populated regions. That's one of the major benefits to this proposal.

The major detriment: Politics. How do you build a laser big enough to knock space junk out of orbit without convincing half the world that what you've really built is a giant death ray? That's something the authors hope to avoid through international cooperation.

Via We Are All In the Gutter

Image: Goddard Celebrates International Observe the Moon Night with Laser Show, a Creative Commons Attribution (2.0) image from gsfc's photostream

Flexible wood

Rob Beschizza — Fri, 21 Oct 2011 13:09:53 +0000

Snijlab's wood flexes and folds thanks to an intricate pattern of laser-cut grooves. The best part, however, is that the materials and hardware required to do it yourself are commonplace.

"Because a laser cutter is a fairly common tool, products like this could be manufactured locally," write the creators on their website. " ... For us this means we can make everything in-house and we don’t need to produce in big quantities to make it affordable. This is really the power of digital manufacturing and personal fabrication."

Pictured above is Snijlab's first offering, a booklet holder you can buy for €25.

Snijlab homepage via Freshome.