Thursday , June 8 2023

Researchers invent a way of gradually removing chromatic aberrations, aka halo effect from images


While using mobile devices, I saw images with a halo effect. Can be seen on the images taken from any room and we can not attach it to smart phones only, the halo effect is also present on SLRs, telescopes and other imaging devices. The halo effect is generated when a dark light point is tilted toward the camera lens and, in response, produces a ring-like effect around the luminous object. It happens when different wavelengths of light focus on the same point.

In other words, we can call this effect as a chromatic aberration, resulting in the halo purple effect. Well, Harvard researchers have found a solution and have given a new "metacorrector" to fix this problem.

The new processes comprise a single nanopiole surface, spaced less than a wavelength. It can be used to manage phase, amplitude and polarization of light. It's an effective way to minimize or completely eliminate the halo effect in images. The method is cheaper and simpler to correct chromatic aberrations.

This will help an age correction technique to be replaced by a new engineering of nanostructures. This will help make images more refined and precise without any halo effect. Although it is a simple, efficient and cheaper method.

meta corrector
Nano Piloni

"You can imagine the light because the different packages are delivered at different speeds as it propagates into nanoparillons. We designed the nanoparticles so that all these packets reach the focal point at the same time and with the same temporal width" said Wei Ting Chen, a research associate in physics applied at SEAS and the first author of the paper.

Now, the usual lens limitations will not affect performance and we can cross the borders. We hope that in the next few years we will see that it is included in new imaging systems or products. Now, the team is further refining this new technology so it can also be used for miniature optical devices.


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