Monday , June 21 2021

Researchers raise way to gradually reduce the chromatic aberration halo effect image



While using mobile devices cameras, we saw images b & # 39; halo effect. Can & # 39; watched over the pictures taken by any camera, and we can not ninghaqadha & # 39; Only smartphones, the halo effect is also present on SLR cameras, telescopes and other devices & # 39; image. The halo effect is generated when the dark spot light is inclined toward the camera lens, and in response, produce an effect like a ring around the luminaire. This happens when the term & # 39; & # 39 different waves; focus light on the same point.

In other words, we call this effect as chromatic aberration, resulting in purple halo effect. Also, researchers at Harvard have found a solution and "metacorrector" again to rectify this issue.

The processes consist of surface & # 39; layer & # 39; nanopillars, spaced less than a length & # 39; waves. Can & # 39; is used to manage the phase, amplitude and polarization of light. It is an effective way to minimize or completely eliminate the halo effect from images. It is quite cheap and simple method to correct chromatic aberrations.

Will the year & # 39; of & # 39 techniques; replace old correction to & # 39; new nano-structure of engineering. This helps the image is more refined and more accurate without any purple halo effect. Although, it is a simple method, efficiently and cheaper.

correction when
nano pillar

"You & # 39; imagine the light by different packages shipped with & # 39; different speeds as spreads in nanopillari. Iddisinna the nanopillari so all these packets arrive at the focal spot at the same time and with same width & # 39; temporal, " said Chen Wei Ting, Associate & # 39; Research in Applied Physics at SEAS and first author of the paper.

Now, the limitations of conventional lenses do not affect performance, and we can go beyond the boundaries. Hopefully in the coming years, and will see it incorporated into systems or new products image. Now, the team continues to refine this new technology, so it can & # 39; also be used for small optical devices.

(Via)


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