Resolving Chromatic Aberration Since no one lens can focus different light wavelengths at a single point, there’s a need to use multiple convex and concave lenses made from different types of ...

Shanghai Optics Inc - Plano Concave LensesA plano concave lens is an optical lens with one concave surface and one flat surface. It has a negative focal length, and can be used for light projection, ...

Source: NOVA: "Galileo's Battle for the Heavens" This resource was adapted from NOVA: "Galileo's Battle for the Heavens." As early as the 1300s, eyeglasses made from convex, or outward-curving ...

A plano-concave cylindrical lens is used to expand light in on-axis. A negative cylindrical lens is able to diverge collimated input light away from a line. Plano-concave cylindrical lenses are used ...

We've seen plenty of curved screens, but Sony has just revealed the first picture taken with a curved image sensor that may one day bring cheaper, smaller lenses and higher photo quality. Regular ...

The lens is produced by blocky, S-shaped “unit cells” a few millimeters wide that refract radio waves in particular directions. The roughly concave lens is formed from 4,000 of these cells.