Researchers have created a compact camera where the lens is replaced by engineered optics that can identify objects at ...

Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object ...

Flat lenses, such as metalenses ... or stepper," said Associate Professor Kuniaki Konishi from the Institute for Photon Science and Technology. "This is due to a special type of photoresist ...

In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.

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Paper-thin optical lenses simple enough to mass produce like microchips could enable a new generation of compact optical devices. A team with researchers at the University of Tokyo and JSR Corp.

One example is the question of which lens is right for a given task? There are common lenses like wide-angle, macro, and zoom, as well as lesser-known specialty ones like the anamorphic lens.