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Worldwide: 3D printing creates mechanical "laser show" using a pointer

Software engineer Evan Stanford created a mechanical “laser show” using 3D-printed gears, cams and supports.

It works by putting a standard pen-type laser pointer between two cams. Cranking a handle turns the cams which bounce the laser pointer up/down and left/right to create projected patterns:

Evan Stanford mechanical laser show 01

By using different cam shapes, different patterns can be projected:

Evan Stanford mechanical laser show cams

Instructions and plans are available online, including Thingiverse 3D printing files.

Stanford noted “At this point I think it is unlikely I will continue the project. But if I did, here’s what I could do:” He then listed adding blinds to make discontinuous patterns, making the device motor driven, and adding a web service to make it easier to create new cam patterns.

From Evan Stanford’s Hackaday.io page, posted in mid-June 2017

US: Student builds device to automatically shoot eyes with a laser pointer

A 19-year-old Northern Arizona University student posted a YouTube video showing a device he built that tracks a face, and aims a laser beam towards the eyes.

Michael Reeves’ tongue-in-cheek narration states “…it’s really doing its job of lasering me in the eye which is the real innovation here. To my pleasant surprise I found that this machine also solved another of society's problems; the fact that you're not seeing little tiny dots in your vision all day long. I know where to go when I wanted to see little dots, now I can't focus on anything.”

Michael Reeves laser pointer in eye 01
The inset photos show what the camera is seeing (left) and the red box indicating face detection (right)

The laser in the video looks substantially more powerful than the U.S. FDA limit of 5 milliwatts. (However, it can be difficult to estimate laser power from a video. For example, the camera may be more red-sensitive than human eyes which might explain why the beam seems so large and bright.)

Anyone doing this should be aware of the problem of laser pointers often being more powerful than the label states, and more powerful than the U.S. limit of 5 mW.

Fortunately for Reeves’ vision, the laser is mechanically aimed by two devices that move it left-right and up-down. This makes the aiming relatively slow and lagging the facial recognition, so the beam can be dodged much of the time. He moves to avoid the beam, and is hit in or very near to an eye about once every couple of seconds.

The screenshot below shows the camera (blue arrow) and a laser module mounted on two servos (yellow arrow).

Michael Reeves laser pointer in eye 02

As befits a student budget, the housing is an old pizza box. Reeves wrote the facial recognition and aiming program in C#, using Emgu CV, a .Net wrapper for the OpenCV computer vision library.

In about a day, the video received 80,000 views as well as being featured at tech blog The Verge.

From The Verge. Original YouTube video here.

UPDATED April 19 2017: Michael Reeves told C/Net “My eyes are fine. A lot of people seem concerned about that, which I admit is warranted. I used a 5 mW laser diode, and never had it in my vision for more than a fraction of a second."

US: Hobbyist builds 200-watt portable laser from scrap parts

A video on YouTube shows a homemade 200-watt portable laser “bazooka” made from cast off parts and broken electronics. One week after being posted on June 28 2016, the video from user “Styropyro” (Drake Anthony) had 1,733,000 views. Stories about the laser were also featured on major media sources including the Daily Mail, the Mirror, Popular Science, Yahoo News/Popular Mechanics, Gizmodo, and TechCrunch.

Anthony started by harvesting lasers used in DLP video projectors, such as the Casio “LampFree” series:

Casio LampFree laser hybrid projectors

He purchased four broken projectors, each with an array of blue laser diodes totaling 50 watts, to get a grand total of 200 watts of laser output. He then used knife-edge optical components to help superimpose all the laser beams.

When energized, the beam is immense and powerful:


The highest (most hazardous) laser classification is Class 4, which starts at 500 milliwatts (0.5 watts). Such lasers can cause instant eye injury, skin burns and can burn materials. Anthony’s 200 watt laser is 400 times more powerful than the 0.5 watt limit where Class 4 begins.

In the video, Anthony says “this feels like I’m holding a bolt of lightning in my hands. This is definitely my new favorite toy.”

Adding a magnifying glass to the end focuses the beam onto a spot that can almost instantly burn a block of wood:

200w styropyro laser 02

When operating the laser, Anthony wears a welder’s mask with laser goggles fitted. This prevents potential retinal burns caused by looking at the concentrated laser light. Below he is shown with the laser and mask.

200w styropyro laser instagram

At the end of the video, he says “I'm glad to have finally finished this beast because that means I can start working on some of my other projects, and in the coming months I have a lot of crazy stuff planned including impulse lasers that peak in the megawatts as well as explosively pumped lasers, so I'm looking forward to that….Until the next time, stay safe and happy lasing!”

Drake Anthony is a 23-year old senior at Southern Illinois University, who has been accepted into the University of Rochester PhD program. In a Feb. 2016 newspaper profile entitled “SIU student turns passion for lasers into potential career”, the author notes that “What really excites Anthony is the science behind the beam.” She quotes him as saying “From a theory perspective, it’s beautiful. It uses physics, it uses quantum physics, chemistry, good things of math, engineering. It’s just this conglomeration of all the best things that humans have come up with.”

From the YouTube video
“My Homebuilt 200W LASER BAZOOKA!!!!!”, posted June 28 2016

US: Hobbyist builds 40 watt laser "shotgun"

A hobbyist posted a YouTube video on June 7 2015, showing a homemade laser “shotgun” that emits a 40 watt visible light beam capable of burning materials almost instantly.

styropyro 40 watt 40W laser shotgun

The hobbyist, with the username “styropyro,” wrote on YouTube: “Just finished building my 40W(!!!) laser shotgun!!! The output of this laser is complete insanity, and is made up of 8 parallel 5W laser beams totaling to 40W. The parallel beams are manipulated with lenses, sort of like how a choke modifies the spread of a shotgun blast. The massive diode array is powered by a huge lithium polymer battery pack (capable up dumping 250A) and the laser array is regulated by a whopping 24 LM317 drivers. This is definitely the craziest thing I have ever built, but I hope to beat this invention with something even crazier before too long.”

In the video narration, he said “I just built something so crazy that I’m almost afraid to use it” and “There is no, no good reason for anybody to own something this powerful. But because it wasn’t illegal for me to build, I decided to build it anyway.” The video then goes on to show the beam popping balloons, and burning paper, a ping-pong ball, and other materials.

Styropyro had previously posted other videos with titles such as “Homemade Lightsaber!?! MASSIVE 3W Handheld Laser Torching Stuff!!”, “My Homemade 6W Laser Sword!!!” and “Homemade Death Ray Laser DRONE BOT!!! Remote Controlled!!!”

From Gizmodo. Thanks to Patrick Daniel Murphy for bringing this to our attention via Reddit.

Germany: Latest film-inspired laser shoots beams out of glasses

Laser hobbyist Patrick Priebe has fabricated a unique pair of glasses that emulates the X-Men comic book hero “Cyclops”. It emits two powerful Class 4 blue laser beams, as if they are coming from a person’s eyes. In addition, there are two low-powered red aiming beams.

The technique is to look in the desired direction with the red aiming beams on, then to switch on the blue beams while looking at the desired target. The glasses have a lens that attenuates blue laser light, so that the user is protected in case of any reflected blue beams.

Patrick Priebe X-Men Cyclops laser glasses
The two blue beams emitted from Priebe’s glasses, each roughly 1 watt, can burn cloth and pop balloons.

X-Men Cyclops

His inspiration: Cyclops’s 2-gigawatt “optic blast,” which is red in the Marvel comic books.

An online YouTube video shows Priebe’s laser glasses in action:

Due to the inherent danger of head-worn lasers, Priebe is not making additional glasses and he is not offering plans for others to build their own.

Priebe has previously built custom laser gadgets such as a replica of Iron Man’s palm-mounted repulsor ray projector, a laser “Gatling gun” with six rotating 1.4 watt blue beams, and a laser gun that emits a non-visible 1 megawatt pulse.

From Gizmodo. Original video posted by AnselmoFanZero.

Germany: Hobbyist creates laser "Gatling gun" with six rotating 1.4 W blue beams

Well-known master builder Patrick Priebe has created a laser with six 1.4 watt blue lasers that rotate, similar to a Gatling gun. In addition, there is a 100 milliwatt green laser used for aiming:

Patrick Priebe laser Gatling gun

Click to

US: UPDATED - Video of homemade 3 watt handheld laser gains attention

A YouTube video published May 22 2013 shows a homemade 3 watt handheld laser burning various objects. The laser uses a 9mm 450 nanometer diode, and is powered by two 18650 Li-ion batteries. Drake Anthony, known on YouTube and laser forums as “styropyro” notes “This is the most powerful handheld laser that I’ve ever used! …. To be honest, I don’t even like handheld lasers this strong, but I knew my subscribers would like this. This laser is legal to own in the US, and I wore goggles while shooting this video.”

Lasers in the 1 watt range have been widely available since the mid-2010 introduction of the Wicked Laser Spyder III Arctic blue laser. This is the first handheld 3 watt laser that LaserPointerSafety.com has been aware of.
Click to

US: Man builds a replica Star Trek phaser

A story made the rounds on the Internet in late April 2012, about a “working” Star Trek phaser. It uses a blue diode inside a toy or replica phaser housing, and is shown in a video popping a balloon.

Pic 2012-05-02 at 4.19.05 AM

This is not the first time such a project has been done. In 2007, Kip Kedersha (“Kipkay”) posted a YouTube video showing how he bought a surplus Playstation 3 laser diode for $45 and a Star Trek toy for $30, in order to make a laser-emitting phaser.

A Huffington Post story has the 2012 video, as well as links to earlier videos and detailed build instructions.

From Reddit via the Huffington Post

Germany: "Iron Man" laser fires Class 4 beam from a hobbyist's palm

A German laser enthusiast can fire a 1 watt, Class 4 laser beam from his palm. He fabricated the device in a weekend, using a laser diode similar to those harvested from Casio video projectors. (The same type of diode is used in the infamous Wicked Laser Spyder III Arctic handheld laser.)

Hobbyist Patrick Priebe’s inspiration was the comic book character “Iron Man”, who has “repulsor rays” in the palms of his armor’s gloves. Priebe’s device is self-contained, with the battery in a case that wraps around the back of the hand. Simply flexing his hand triggers the beam to fire.

Priebe’s 1 watt, 445 nm blue laser beam ignites a match

His inspiration: Iron Man’s repulsor ray glove, as seen here in the motion picture with Robert Downey, Jr.

Priebe made a number of versions. He is selling limited numbers (not mass-produced) of kits and assembled gloves on laser pointer forums for $200-500 depending on the version.

Popular Science and many other sources. Details on the construction are at Hacked Gadgets. Videos of the device in action are here and here.

Germany: Homemade laser pulse gun packs 1-megawatt punch

Homemade lasers, using diodes from DVD burners and video projectors such as the Casio Green Slim, are common among hobbyists. However, a new homemade laser is the first we have seen with a 1-megawatt pulse.

This differs from most pointers and handheld lasers, which use lasers that emit continuous light. This one emits a single, strong pulse each time the trigger is pulled. It is “enough to punch holes in plastic sheets, scorch wood, and pop balloons from several feet away” according to Dvice.com.

The maker, Patrick Priebe, posted a YouTube video showing the gun in action. He also was offering it for sale. According to Priebe, the gun uses a Q-switched Nd:YAG laser. It takes four seconds to charge the capacitor; the gun then fires a 100 nanosecond, 1 megawatt burst of infrared 1064 nanometer light. The gun took Priebe about 70 hours to build. His YouTube page offers to help others wanting to build their own laser gun.

SAFETY NOTE: Because the laser emits an invisible pulse, it would not be a visual interference hazard to aircraft (e.g., it could not cause glare or flashblindness). At close range the Q-switched pulse would definitely be an eye hazard, causing an explosive steam “pop” on the retina rather than the relatively slow burn of a continuous-wave laser. LaserPointerSafety.com has not done an analysis to determine the “safe” distance, beyond which it would not pose an eye hazard to pilots or others.

Dvice.com and Hacked Gadgets forum

US: Casio sends cease-and-desist letter to "harvesting" hobbyist

Casio’s law firm sent a cease-and-desist letter to a laser hobbyist who was selling laser diodes harvested from a Casio video projector. The letter objected to the removal of the diodes (“disassembly is prohibited”) and to the use of Casio’s name in the eBay auction.

The hobbyist indicated “I will comply since the things don’t really bring me much money.”

A link to the hobbyist’s post and the text of the letter are after the break (click the “Read More...” link below). For background information on the Casio diode harvesting, see the June 2010 alert.Click to read more...

US: UPDATED - Injury reported from Casio-sourced 630mW diode

A laser hobbyist reported injuring himself with a 630mW “keychain” laser emitting at 445 nm. He had a brief, accidental exposure when he lost his grip on the laser and it crossed a mirror. It hit directly in his left eye. He reported being flashblinded for 30 seconds and had an afterimage for 10 minutes, with the center “as black as black could be”. The black spot stayed for about 12 hours.

More than two weeks after the accident, he reports “... there are no identifiable irregularities. I am certain there is permanent damage in the spot, but it is so far out in [my] peripheral vision, that it is just not noticeable. So I have officially ceased worrying about it. Lesson learned.”Click to read more...