Chromatic aberration is just a fact of life when it comes to photography. A combination of high-quality gear lenses in particular – and user skill can minimize the revealing purple fringe. But what if a simple layer on your lens could eliminate CA? Enter a team of researchers at the Harvard School of Engineering and Applied Science (SEAS) who did just that.
Called "metacorrector," the coating is composed of a "single layer surface of nanostructures," according to a SEAS press release.
The structures can be seen in the image below.
Structures, or "nanopillaries", change the speed at which light reaches the focal point, reducing or eliminating chromatic aberration:
"You can imagine the light as different packages being delivered at different speeds as it spreads through the nanopills. We design the nanopillars so that all of these packages reach the focal point at the same time and with the same temporal width, "said Wei Ting Chen, associate researcher in Applied Physics at SEAS and first author of the paper.
Here is another image, showing photos taken without (to the left) and with (to the right) the metacorrector. As you can see, the difference is substantial.
I know we are all here drooling over the prospects for photographers, but technology has many applications – for example, in high resolution microscopes where clarity is paramount.
And while Harvard is "exploring [commercialisation] opportunities, "I think it will take some time for us to penalize.
How to Quickly Correct Chromatic Aberration in Photoshop
Chromatic aberration is the unwanted distortion of colors that you sometimes perceive at the edges of your photos. This is because the light colors have different wavelengths, which means that the camera lens holds them slightly differently. Here's a quick fix to make up in Photoshop.
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