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Caltech articles

Displaying 1 - 4 of 4

Camera design focuses light without lenses

Camera design focuses light without lenses
Traditional cameras - even those on the thinnest of cell phones - cannot be truly flat due to their optics: lenses that require a certain shape and size in order to function. At Caltech, engineers have developed a new camera design that replaces the lenses with an ultra-thin optical phased array (OPA). The OPA does computationally what lenses do using large pieces of glass: it manipulates incoming light to capture an image.
23rd June 2017

Noise-cancelling optics

Noise-cancelling optics
Engineers at Caltech have created the visual analogue of noise-canceling headphones—a camera system that can obtain images of objects obscured by murky media, such as fog or clouds, by cancelling out the glare. When you drive through fog, objects on the road are difficult to see because the light from your headlights is mostly scattered back at you by particles in the fog—a phenomenon called "glare." This effectively masks the objects that are dimly reflective.
11th October 2016

Optical soliton wave travels in the wake of other soliton waves

Applied scientists led by Caltech's Kerry Vahala have discovered a type of optical soliton wave that travels in the wake of other soliton waves, hitching a ride on and feeding off of the energy of the other wave. Solitons are localised waves that act like particles: as they travel across space, they hold their shape and form rather than dispersing as other waves do.
7th September 2016

Light coherence analysis produces precise 3D images

Light coherence analysis produces precise 3D images
Imagine you need to have an almost exact copy of an object. Now imagine that you can just pull your smartphone out of your pocket, take a snapshot with its integrated 3-D imager, send it to your 3-D printer, and within minutes you have reproduced a replica, accurate to within micrometres of the original object. This feat may soon be possible because of a tiny high-resolution 3-D imager developed at Caltech.
10th June 2015

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