Researchers at Princeton University and the University of Washington have developed a tiny camera the size of a grain of salt that can capture vivid, colorful images. This camera has a meta level that receives light.
Researchers publish their research results in a journal Nature Communications Have published. They are made like a glass panel with a circular pattern in the middle. This half-millimeter circular pattern actually contains 1.6 million cylinders, each of which is specially designed. The special design of these cylinders allows all of them together to bend the light in such a way as to create an optical wave front. Signal processing algorithms then visualize from this information.
The images from this camera are much sharper than other small sensors. The team has shown in experiments that their new sensor can produce 720 x 720 pixel color images. The camera is capable of receiving wavelengths in the range of 400 to 700 nm and has a resolution of 214 pairs of lines per millimeter.
The field of view of this camera is 40 degrees and its aperture is f / 2.0. Researchers say the images from their cameras are comparable to lenses that have a sensor half a million times larger than the sensor. The major part of the image quality improvement process is related to post-processing algorithms.
The next point is the simplicity of producing these products. Researchers can probably easily produce them on a large scale. They say the camera is made of silicon nitride, and surface nanostructures can be created with deep ultraviolet lithography. This device can be used in medical imaging.
“We can turn different levels into very high-resolution cameras so that we no longer need three cameras in the back cover of our mobile phones,” says Felix Hyde, lead author of the article. “In the future, we can think of a completely different way to build devices.”