![]() ![]() The distances between the lenses and the sets of lenses depends on the focal lengths of the lenses you start with and is defined by some simple math: Then each “set” is set at a distance from the other (d2). Each “set” is composed of two lenses (f1 and f2 ) at a distance from one another (d1). The trick is setting up the lenses at specific distances from each other along an axis (meter stick)īy setting up the four lenses as shown you can create cloaked regions. ![]() This project uses 4 simple lenses, a meter stick and some very simple math to create regions of invisibility. One way to achieve invisibility is to bend light (refraction) around an object - one way to do that is with lenses. What really mean is that we are able to see around and behind the invisible object, as though it were not there at all. Now, you can simply cover an object and no light from it will get into your eye, but that is not really invisibility in the way that we like to think about it. The object is present, but no light bounces from it into your eye, so it appears to “not be there”. Invisibility happens when an object that “should” bounce light into your eye does not. This is a replica of the Rochester Cloak - developed last year at the University of Rochester in NY. Okay - its not a CLOAK, per se, but it is a cloaking technology - and its a super simple set up to see how one of the most promising approaches to invisibility technology that we can use (think surgeons being able to see through their hands during surgery). ![]()
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