scientist child animated with an ivisible backround

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In a forest, where everything is broken up, the lens system presents a broken up image that could make for very effective concealment. If the background is close enough (e.g., in a forest, or if you are looking down from a plane), then the lens system will present a patchwork of the background. The lens system basically presents the viewer with partial images of objects in the background.

A sheet of this material can act as a kind of adaptive camouflage. That said, this work may not be a set of useless tricks. Unfortunately, there is no combination of lenses that does not reveal itself in fairly obvious ways.

You can play almost any trick you like with the background while still concealing an object that is relatively close to the sheet.īut every combination does something to the background. The effects of these mismatched lens systems are really cool: you can magnify the background, demagnify the background, and get repeating images. You can combine back-to-back lens sheets in pairs, with varying lens spacings and focal lengths. Instead, the background jumps about, and, at a certain distance, objects will flip orientation. If you combine lenses back to back, you can make the sheet thinner, and the background isn’t as blurred. Now, the video goes into excruciating details of variations on the theme of lenticular lenses. You’d really have to have a plastic brain to not be suspicious when trees jump up and down as your head moves. So, yes, you have hidden an object, but it is a pantomime invisibility. However, once the sheet is curved, nothing can hide the distortion: you may not know what is hidden, but you can certainly tell something is hidden.Įven worse, for flat sheets, the background isn’t just distorted, it also moves just like the animated images in the ruler you had as a kid. This hides the distortion that is induced by the lens sheet. In many demonstrations, the background is kept very bland and symmetrical. This keeps the invisibility point at a single spatial location. A single object can be hidden by curving the sheet of plastic so that no matter where the viewer is, their angle with respect to the sheet of lenses remains the same. Of course, if you move to the left or right, then the object will reappear-the invisibility point depends on your viewing angle. The background behind the object, however, does not appear in place of the object in that sense, this is not invisibility. This is the invisibility that is advertised. If an object is the right distance from the sheet, there is no angle of light refraction from any lens that will go in your direction-effectively, you cannot see the object. Light will reach the ruler from an object behind it, hit the lens system, and get refracted. Consider that you are viewing a scene that is behind a sheet of lenticular lenses, getting rid of the images. Lenticular lenses produce some really strange effects if the backing is removed. If the images are similar enough, changing your perspective creates the illusion of a single item moving. At one angle you see one image and at a different angle you see a second image. By changing angles, the focal stripe of the lens shifts left and right.

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This works because the plastic coating consists of a series of stripes, creating what are called lenticular lenses.

By tilting the ruler, the images it contains appear to move. I think almost everyone has at one point owned a plastic ruler with an animation on it. I can kind of see how it might be useful to people with guns in some circumstances. It might be best to think of the inventor as creating a kind of clever adaptive camouflage. However, the interminably long “technical” video has some value in that it makes it clear what the material does and does not do. Add science by YouTube video, and yes, this looks like shoddy science at its best.

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In the end, the story was driven by a blathering press release full of typically questionable science buzzwords. Earlier this week there was suddenly news of an exciting new invisibility cloak.

Scientist child animated with an ivisible backround