laser projector

Brandon Thomas demos Laser Pong, a game he built on a laser projector and projected onto buildings around Atlanta. It was a weekend project.

Styropyro tests an eBay laser tattoo removal device and finds it is a roughly million-watt pulsed laser, powerful enough to ignite air in the beam. He had bought it hoping to salvage an Nd:YAG laser cavity.

Ben Krasnow of Applied Science shows that a plain laser diode can measure sub-micron vibrations from centimeters away using self-mixing interferometry, and can also be used for range-finding.

Royal Institution lecture by Dr Kate Lancaster on the most powerful lasers in the world and the extreme conditions they create. It includes live demonstrations and covers applications from industry to fusion.

A short National Geographic piece showing a laser system that tracks and kills mosquitoes, filmed in slow motion, as part of anti-malaria efforts. It comes from Intellectual Ventures' 2010 work.

AlphaPhoenix shows off a new camera that films at two billion frames per second and uses it to film a laser pointer pulse. He investigates a strange quirk in how the speed of light appears on camera.

A clip from the 1985 comedy Real Genius in which a laser ignites a giant container of popcorn inside a house.

A spoof commercial by the Groen Brothers for a Star Wars-style laser defense system against mosquitoes.

A SIGGRAPH demo from Yoichi Ochiai's group of aerial and volumetric graphics drawn by focused femtosecond lasers with computational holography. The plasma points can be touched.

An episode of Coding Secrets by Jon Burton on retro copy protection, in particular physically damaging a disk with a laser so copies fail. It explains how this defeated hackers and pirates.

A real-time demoscene production made with an overhead projector, released by DESiRE and TRSi for @Party in the OHP category. It is a short, quirky entry in the demoscene tradition.

A Dutch parody commercial from the Groen Brothers for a supposed Star Wars style mosquito defense system. It mimics the style of infomercials with laser-armed anti-mosquito technology.

Asianometry explains the EUV light source inside ASML's lithography machines, where lasers hit falling tin droplets twice to produce 13.5 nm light. It walks through the engineering of the droplet generator, the pre-pulse and main laser, and the plasma that results.

Huygens Optics explains the Fourier transform and shows how a lens performs one optically. A DLP projector is used as a Fourier filter to do simple pattern recognition on lithographic character patterns.

The SIGGRAPH 2005 demo of dual photography from Stanford, which swaps the roles of projector and camera to render a scene from the light's point of view. It includes the reveal of a hidden playing card.

Huygens Optics experiments with etching tiny patterns in glass, covering hydrofluoric acid risks, buffered oxide etch, photoresist and chromium masks, and laser-induced etching. It ends with attempts at microscopic Tesla valves.

Real Engineering explains the materials science behind metal 3D printing, including crystal structure, laser sintering, and why printed parts develop fatigue cracks. It shows how process imperfections limit the strength of printed metal.

Kung Fury is a 30-minute crowd-funded 80s action comedy about a kung fu cop who travels back in time to kill Hitler, packed with retro tropes.

A Mr. Show sketch, 'Blow Up the Moon', in which characters cheerfully argue for blowing up the moon.

A comedic Kung Fury spinoff in which Hackerman demonstrates 'hacking' household objects through time. It parodies 1980s hacker tropes.

A two-minute clip of the printer-smashing scene from the film Office Space, set to its rap soundtrack. The uploader assembled it as a cleaner version.

Bret Victor's DBX 2013 talk, delivered in the guise of a 1973 IBM engineer with an overhead projector. It surveys forgotten ideas from 1960s and early 70s computing and warns against assuming you know what you're doing.

Matt Adereth's Clojure/conj talk covers the history of keyboards and how he used Clojure generating OpenSCAD to design and build his custom Dactyl ergonomic keyboard, including 3D printing and laser-cut parts.

Real Engineering's Brian McManus explains Helion's approach to nuclear fusion: colliding two plasma rings, compressing them magnetically, and capturing energy directly from the changing magnetic flux rather than boiling water. It covers why this pulsed design sidesteps problems of tokamaks and laser fusion.

The Kodak Carousel pitch scene from the Mad Men season finale, in which Don Draper sells nostalgia through a slide projector. It runs about three minutes.

Mark Handley of UCL looks at how SpaceX's November 2018 revisions to the Starlink constellation affect network behavior. The video visualizes the orbits and routing and estimates latencies, building on his earlier video and research paper.

A short visualization from HotNets researchers of routing and latency over SpaceX's proposed Starlink constellation, based on its FCC filings. It shows orbital shells, link topology and how inter-satellite routes could beat terrestrial fiber on long distances.

Huygens Optics shows through a laser interference experiment that the question of a photon's size is really about coherence length. It argues that photons exist as energy exchanges between radiation and matter, not as little particles in free space.

Huygens Optics shows how DIY photon sieves shape a laser's wave front, explaining how they differ from zone plates and how aperture count affects the focal point, with time-resolved visualizations of the diffraction.

Veritasium explains in detail how LIGO detects gravitational waves, with a laser interferometer measuring displacements smaller than a proton. The video focuses on the extreme precision and the techniques needed rather than the general discovery story.

Maker's Muse designs a 3D-printed and laser-cut puzzle box to test whether wild sulphur-crested cockatoos can solve it. He documents how the birds work it out.

Pranav Mistry demos SixthSense, a wearable device that projects information onto the physical world and lets people interact with data through gestures. He also shows a paper "laptop" and says he will open-source the software.

A short walkthrough of a hack that tricks a Brother laser printer into accepting third-party toner by working around its genuine-toner check. It notes this may void the warranty.

A scene from John Carpenter's 1981 film Escape from New York in which Snake Plissken glides in over Manhattan between the Twin Towers. It features the film's wireframe green laser-grid visuals built from miniatures.