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American scientists have developed a new filter

18.02.2012

A team of American scientists, with funding from the Air Force Office of Scientific Research (AFOSR), is developing a new circular polarization optical filter. The unique filter will allow you to see clearly through clouds of dust and clouds, in addition, it can help in medical diagnosis and the creation of unique optical instruments.

Polarization is a phenomenon in which light rays have different properties in different directions. When light reflects off a surface, such as window glass, it is polarized parallel to the reflective surface.

As a result, we see a glare that makes it difficult to see what is behind the glass. The human eye is able to distinguish colors, but cannot see the inherently different polarizations of light emanating from an object. Polarizing filters absorb polarized light, reduce glare, and as a result allow you to see even through a brightly lit window.

It is easier to understand the operation of the new circular polarization filter using the example of a simple digital camera. Digital cameras take color pictures using tiny filters that produce a full-color image on a pixel consisting of 3-4 dots that capture individual colors. The new light filter captures linear and circular polarization of light in the same way. Similar polarizing filters that cut off glare are used by snipers or photographers. The new filter will make it possible to create a polarizing digital camera that will be able to filter out a variety of stray illumination or view in a range that is not occupied by optical interference.

Linear polarizers are made quite simply, but there has been a problem with circular polarizers so far. However, American scientists have managed to develop a microstructure capable of accurately measuring polarized light. This makes it possible to create a color polarizing camera that will allow you to see through dust, clouds and other obstacles through which light polarized in a certain way passes.

In addition, the new filter can be used to study, for example, DNA helices and detect various tissue abnormalities, such as cancer.

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