Scientists are working on developing an ultra-thin lens that will turn out to be inevitable for all future smartphones and cameras. The lens designed are reportedly 10 times thinner than human hair and insertion of such lens will reduce the weight and dimensions of smartphones. Recently a group of scientists headed by Prof. Rajesh Menon of the University of Utah submitted a paper to Scientific Reports for publish. The paper is titled “Chromatic-Aberration-Corrected Diffractive Lenses for Ultra-Broadband Focusing”.
Check out the Abstract of the project:
“We exploit the inherent dispersion in diffractive optics to demonstrate planar chromatic-aberration-corrected lenses. Specifically, we designed, fabricated and characterized cylindrical diffractive lenses that efficiently focus the entire visible band (450 nm to 700 nm) onto a single line. These devices are essentially pixelated, multi-level microstructures. Experiments confirm an average optical efficiency of 25% for a three-wavelength apochromatic lens whose chromatic focus shift is only 1.3 μm and 25 μm in the lateral and axial directions, respectively. Super-achromatic performance over the continuous visible band is also demonstrated with averaged lateral and axial focus shifts of only 1.65 μm and 73.6 μm, respectively. These lenses are easy to fabricate using single-step grayscale lithography and can be inexpensively replicated. Furthermore, these devices are thin (Nature