Laser-induced plasma to create 3D volumetric images with sound 🤯 by @mes on 3Speak
Laser-induced plasma to create 3D image projection with sound and touch via ionizing the air, even creating a path for lightning strikes or electric current to flow through! 🤯 Note the loud sound ...
Tags: #3speak #laser #light #hologram #technology #science #physics #electromagnetism #military #uap
Ferry Lights in Femtoseconds. Aerial and Volumetric Graphics rendered by focused Fem to Second Laser, combined with computational holographic fields. We present a method to render an aerial and volumetric graphics in air by Femt to Second lasers. Laser-induced plasma emits light without involving any physical matter. Daily life applications can be explored because plasma induced by a femtosecond laser is quieter and safer than that by a nanosecond laser. Our results led to calmer and safer plasma generation. that can be incorporated into our daily lives. The design space and possible scenarios of the plasma-based 3D display are discussed. In addition, we use an optical device called the spatial light modulator to modify the phases of light rays and produce various spatial distributions of light-based on interference. The remaining sections of this paper discuss the following. First, we describe the principles and design parameters of fem to second laser-based volumetric displays. We explore a safe, high-resolution, wide variety, laser-based volumetric display using a femtosecond laser and an SLM. Second, we introduce the setup we designed. Third, we give examples of applications. Finally, we conduct experiments on generation, safety, and control of lasers. We've also discussed the limitations and estimate scalability. We believe that this study fills the gaps in design space of plasma-based 3D displays that were left unresolved by previous studies. Ferry Lights and Femtoseconds. Aerial and volumetric graphics rendered by focused Fem to Second laser, combined with computational holographic fields. Most people are familiar with holograms, three-dimensional images created by lasers, which can capture an object in three dimensions instead of being like a two-dimensional photo. Full-color lasers can project a moving image onto a hidden piece of glass on a stage to recreate performances from actors and pop stars who are no longer with us. But there is one type of laser-generated imagery which can not only generate 3-dimensional images, but 3-dimensional objects in space, which can have very physical effects on the real world. From creating virtual flashbang grenades for crowd control, to guiding lightning or high-power electrical current, to a target up to 100m or so meters away, to creating fake radar images and heat signatures from jet aircraft to trick radar systems and guided missiles, that a plane or missile might be actually only one of many, which are talking plasma balls and possibly the source of recent UFO sightings that can apparently travel at incredible speeds and perform maneuvers and stops that are unheard of by any man-made aircraft. This is the world of laser-induced plasma. Laser technology was invented just over 60 years ago and since then has gone on to change the world in quite dramatic ways. All our modern communications of moving huge amounts of data over fiber optic cables around the world would not be possible without lasers. High power lasers can not only cut through metals and other materials and perform welding. Ultra-high power lasers are being developed to initiate fusion by concentrating and a whole new energy source can be created here on Earth. And all this is with just light, the same sort of light, photons travel in every direction. and can be made up of any colour or wavelength of light. Laser light is monochromatic, meaning that it has just one wavelength, and all the waves are in phase, meaning that the troughs and peaks of the electromagnetic waves all line up together. This means that a beam of laser light has very little divergence. A military-grade satellite killer laser has a wider opening which conversely creates a less divergent beam. If you were to shoot it at the moon, by the time it got to the surface, it would be about 2.4 kilometres across. If you were to point it at Mars, when it's at its closest point to Earth, which is about 54 million kilometres, the beam will be about 321 kilometres across. But if you use a lens, you can focus the energy down to a spot and greatly increase its power, just like a magnifying glass in sunlight. Also, the most powerful lasers don't run continuously, they only run for a very short period of time, usually from nanoseconds or a billionth of a second to femtoseconds or shorter, that's 10 to the power of minus 15 seconds, or one quadrillionth of a second. Doing this, you can pack a huge amount of energy into a very short space of time, and when you combine that with a focus beam, you can create such high electric fields. that you can strip electrons from atoms and create plasma, the fourth state of matter, a gaseous mixture of subatomic particles consisting of ions and electrons, which is also an electrical conductor. By focusing the laser in air, a tiny packet of plasma or a plasma voxel can be created. A billionth of a second or so, it would seem to last much longer due to the persistence of vision in our eyes. and if you fire thousands or hundreds of thousands of these flashes per second and move the laser beam itself can be moved around with a galvanometer, basically two mirrors, one which controls the X direction and one which controls the Y direction. The technological breakthrough to control the whereabouts in the length of the beam where the focusing should take place was to use a linear motor to move a focusing lens. This would then determine how far away the focus point would be. With this setup you can then position where the plasma will occur anywhere along the beam, but it can be pointed and focused to. In fact, with some very high power systems in the giga and terawatt range, whilst a plasma burst has been initiated, the extreme heating of the air can then alter the speed of light in air and create a lens effect. which can then self-focus the beam. As the ionized gas heats up, it expands rapidly at supersonic speeds to produce a crack or a bang, just like lightning makes a thunder crack. The more powerful the laser, the bigger the bang. Lasers have been around for over 60 years, but it's only in recent times that these new plasma capabilities have been discovered. One of the first applications which was thought up for this plasma technology was thousands of times a second and by modulating the laser it's possible to create an audio sound. This has sometimes been referred to as the voice of God because it could target an individual and a bright light in the air would be talking to them. The type of lasers used are normally infrared so you would not see the beam. only for talking plasma ball. Stop, or we will be forced to fire upon you. In this example, the plasma recreates the sound of a verbal warning, but this is a very low-power lab test. This was announced over five years ago, but so far nothing has been seen of this in public. Lost infrared laser to create plasma voxels for aerial displays. This could then create a rather crude moving image made up of these voxels. a bit like the huge orchestrated drone displays which we're now familiar with, but on a smaller scale. But if scaled up, it would certainly be something that could be seen over a much wider distance, than just for tsunamis that could be broadcast into the sky when maybe other forms of communication were no longer available. Now, as try as I might, I couldn't find any videos that included the original sound of the voxels as they're being created. It would be a one killerhearts noise bath. which is probably the reason why they don't include it on the marketing videos. Since then, the Japanese University of Sukuba has created fairy lights using femtosecond lasers instead of nanosecond lasers that Burton used. This is like a scaled-down colour version creates smaller, quieter and safer plasma voxels that can be touched and interacted with without causing the more serious burns from the larger, longer duration, laser systems of Burton. creating between 4,000 and 200,000 dots per second in frames, with frame rates are between 30 and 100 frames per second. Now, whilst this text seems not to have taken off in the commercial space, the military seemed to have taken it and run with it, but are keeping it pretty much a secret. What we do know is the US Navy has patented a not dissimilar system that could be mounted on an aircraft to create fake infrared signatures as decoys. Using multiple systems could create something that looks like possibly multiple aircraft in infrared light, which can be seen on thermal imaging equipment into creating the plasma voxel. The supersonic shockwave that it creates will create a change in the air pressure that the radar can detect. This is because it alters the density and the refractive index of air. affecting how radio waves which radar uses to propagate through it, which it then can be detected. Now with the observations of the TICTAC and other unidentified aerial phenomena, or UAP, over assigned military testing areas in the Pacific, which have been observed by US Navy aircraft in visual light, infrared and radar, performing such high-speed maneuvers that defy everything we know about flight in air. Might these actually be a highly advanced military version of what we've seen by Burton to create instant, incredibly realistic aerial decoys that look like real aircraft of whatever origin? And when you think that you couldn't do much more with plasma, in 2021, scientists in Switzerland used a high repetition rate terawatt laser on Mount Santis to create plasma filaments to guide lightning strikes. This is similar to using rockets which trail wire into a thunder cloud to initiate a lightning strike. Using a laser, there is no rocket debris or wire to fall back to Earth, and it can be fired as many times as you have power for the laser. This electro laser experiment was demonstrated on a smaller scale by the US Army in the mid-2000s to create plasma filaments close to a nearby target and then send a high power electrical discharge down the filaments to connect with it, be it an object or a person. However, it now seems that an experiment in this field, which was known as Project Phoenix, was where the US Navy tested an electro -laser against aircraft missiles in 1985, and this was part of President Reagan's SDI or Strategic Defense Initiative. In 2017, Dr. Alexander Henning, the lead researcher in the later 2021 US Navy patent, said in a piece for the US Navy's own IT publication, that high-power short-pulse lasers could generate plasma filaments hundreds of metres in length, and that the next generation lasers could create ones that are over a couple of kilometres long, and that would be possible to create phantoms or fake sensor imagery at considerable distances. At the time, Dr Henning had been working on laser enol. So it seems as though we might be either on the cusp of a whole site.
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