Researchers invented almost completely flat camera that captures images without lenses


So far, there has been no camera that can work without lenses, but researchers at Caltech, a science and engineering institute, have developed a new camera design that is actually capable of capturing an image without using a traditional optical system. Instead, the design uses an array of miniature silicon-based light receivers and computations to simulate what lenses do by using pieces of glass. As a result, the engineers have created an ultra-thin and ultra-small chip, which, according to them, may one day replace today’s digital cameras and make them really, really thin.

The researches have actually created an electronic replacement of the traditional lenses, which is almost completely flat. The "optical phased array" chip, as they call it, focuses the image by adding a small, controlled to a “quadrillionth of a second”, time delay to the light received at different parts on the chip. In fact, the engineers have reversed the principle used by phased communication arrays to focus radio waves. Here is how they explain it:


The researchers have created a prototype chip with an 8x8 optical phased array grid containing 64 pixels. As you can imagine and see in the video below, it amounts to a pretty low resolution image, but at least it proves the concept is working. That’s why the folks at Caltech are fairly optimistic about the future of their invention. They believe "the applications are endless".


With all that being said, they already see a future with smartphone cameras and even telescopes that are flat as a sheet of paper. Sadly, there are no details about the project’s schedule, so we still don’t know how far that future is. 

source: Caltech, PDF via Engadget

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6 Comments

1. notfair

Posts: 711; Member since: Jan 30, 2017

slimmer phones with slimmer batteries ..just great...................

2. Landon

Posts: 1242; Member since: May 07, 2015

Just imagine: an iPhone with no camera bump. The future looks promising!

4. Iodine

Posts: 1474; Member since: Jun 19, 2014

That would be amazing - camera is actually a bottlneck for more compact body. The question is, how well would it fit into an "seamlesly black" iPhone design ? Even that LED flash is disrupting.

3. omnitech

Posts: 1131; Member since: Sep 28, 2016

That's creepy. An entire wall can be a camera and we wouldn't know. Washroom stalkers would be virtually undetectable if you can't see a small lens even when you are looking. On the flip side I guess it would benefit law enforcement as much it would perverts.

5. Guaire

Posts: 870; Member since: Oct 15, 2014

Rambus already developed a lensless sensor as well I know. It's not suitable for photography.

6. gehrig

Posts: 423; Member since: Apr 17, 2014

Amazing technology! Apple's dream of a phone that is "a solid piece of glass" is one more step closer to becoming a reality.

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