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Latest Geometrical optics Stories

Human Eye Gives Visionary Design For New, More Natural Lens Technology
2012-11-13 17:02:31

Optical Society of America Drawing heavily upon nature for inspiration, a team of researchers has created a new artificial lens that is nearly identical to the natural lens of the human eye. This innovative lens, which is made up of thousands of nanoscale polymer layers, may one day provide a more natural performance in implantable lenses to replace damaged or diseased human eye lenses, as well as consumer vision products; it also may lead to superior ground and aerial surveillance...

Algorithm Developed To Control Light Patterns
2012-11-13 16:29:59

Ecole Polytechnique Fédérale de Lausanne [ Watch The Video ] EPFL scientists have developed an algorithm to control light patterns called "caustics" and organize them into coherent images It's a simple, transparent acrylic plate — nothing embedded within it and nothing printed on its surface. Place it at a certain angle between a white wall and a light source, and a clear, coherent image appears of the face of Alan Turing, the famous British...

Silvery Fish Can Become Invisible To Predation
2012-10-22 12:03:14

Michael Harper for redOrbit.com — Your Universe Online After all the research we´ve been doing for centuries, nature continues to surprise us from time to time, forcing us to reconsider long-held theories or showing us something totally new. Take, for instance, the reflective properties of silver fish, such as herring or sardines. It´s long been observed that these resplendent fish have the ability to deflect light, making it tricky for a predator to focus and snatch...

2012-09-19 16:39:05

Scientists are reporting development of a revolutionary new lens – flat, distortion-free, so small that more than 1,500 would fit across the width of a human hair – capable in the future of replacing lenses in applications ranging from cell phones to cameras to fiber-optic communication systems. The advance, which could lead to smart phones as thin as a credit card, appears in ACS' journal Nano Letters. Federico Capasso and colleagues explain that the lenses used to focus light...

Perfect Image Offered By Flat Lens
2012-08-24 11:17:42

Ultrathin wafer of silicon and gold focuses telecom wavelengths without distortion Applied physicists at the Harvard School of Engineering and Applied Sciences (SEAS) have created an ultrathin, flat lens that focuses light without imparting the distortions of conventional lenses. At a mere 60 nanometers thick, the flat lens is essentially two-dimensional, yet its focusing power approaches the ultimate physical limit set by the laws of diffraction. Operating at telecom wavelengths...

2011-12-23 01:11:19

Researchers have shown how arrays of tiny "plasmonic nanoantennas" are able to precisely manipulate light in new ways that could make possible a range of optical innovations such as more powerful microscopes, telecommunications and computers. The researchers at Purdue University used the nanoantennas to abruptly change a property of light called its phase. Light is transmitted as waves analogous to waves of water, which have high and low points. The phase defines these high and low points...


Latest Geometrical optics Reference Libraries

45_d1e42be1d02b86de582358c7ab315da5
2010-09-16 15:48:43

A magnifying glass is a convex lens, usually mounted in a frame with a handle, which is used to produce a magnified image of an object. The glass works by creating a magnified virtual image of an object behind the lens. However, the distance between the lens and the object must be shorter than the focal length for the glass to work. If the distance is not correct then the image will appear small and inverted. Many magnifying glasses are mounted on a stand to insure the proper distance...

7_152e02a5c30619830f270e3091ec38522
2004-10-19 04:45:43

Parabolic Mirror -- A parabolic reflector or parabolic dish is a reflective device formed in the shape of a paraboloid of revolution. Parabolic reflectors can either collect or distribute energy such as light, sound, or radio waves. The parabolic reflector functions due to the geometric properties of the paraboloid shape: if the angle of incidence to the inner surface of the collector equals the angle of reflection, then any incoming ray that is parallel to the axis of the dish will be...

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Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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