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Tiny round wide-angle lens outperforms its bigger brothers

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September 26, 2013

The UC San Diego system (left) as compared to the lens and electronics of a Canon EOS 5D M...

The UC San Diego system (left) as compared to the lens and electronics of a Canon EOS 5D Mark III DSLR

Image Gallery (3 images)

When it comes to capturing visual information in photographs, you typically have two choices – use a wide-angle lens to capture as many parts of a scene as possible, or use a close-up lens to better capture the details of one of those parts. However, with a new camera system developed by engineers at the University of California, San Diego, you can do both at once. What's more, the lens used in this system is just one-tenth the volume of a conventional wide-angle lens.

The system utilizes a monocentric lens, consisting of two domed glass shells joined together so that their concave surfaces are facing in toward one another – the result is a one-piece lens that looks like "a perfectly round glass marble." Such lenses are already known for simultaneously having a wide field of view and being able to capture high-resolution images. This means that you could zoom in on a part of one of those wide-angle shots, and still be able to make out details. Additionally, the lenses produce little of the distortion that's common in photos shot with traditional fish-eye wide-angle lenses.

Unfortunately, however, in the past it has proven difficult to convert the optical output of monocentric lenses into electrical impulses that register on a camera's sensor. The UC San Diego team was able to get around this problem by running a bundle of glass optical fibers from the lens to the sensor. Those fibers were polished to a concave curve on one side, which allowed them to align perfectly with the lens' convex outer surface.

Additionally, there were concerns that the lens/fiber optics arrangement would present difficulties in focusing, although this turned out not to be the case.

A photo taken with a conventional 12-mm wide-angle lens (middle) has considerably less res...
A photo taken with a conventional 12-mm wide-angle lens (middle) has considerably less resolution than one taken with a monocentric lens (bottom)

In its present form, the ultra-wide-angle camera system keeps objects in focus from a range of half a meter to 500 meters (1.6 to 1,640 ft), while still producing exceptionally high-resolution images. A 30-megapixel system is in the works, however, and plans call for an 85-megapixel multi-sensor version which will be about the size of a walnut.

Once commercialized, the technology could find its way into applications such as unmanned aerial vehicles, or smartphone cameras.

Researchers at the California Institute of Technology have also had success in designing a system that allows microscopes to capture images that are both wide-angle and high-resolution. That system uses an array of LEDs to produce one wide-angle image that's actually a composite of 150 close-up images that have been digitally stitched together.

Source: Jacobs School of Engineering, UC San Diego

About the Author
Ben Coxworth An experienced freelance writer, videographer and television producer, Ben's interest in all forms of innovation is particularly fanatical when it comes to human-powered transportation, film-making gear, environmentally-friendly technologies and anything that's designed to go underwater. He lives in Edmonton, Alberta, where he spends a lot of time going over the handlebars of his mountain bike, hanging out in off-leash parks, and wishing the Pacific Ocean wasn't so far away.   All articles by Ben Coxworth
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3 Comments

No. Way. This is amazing.

bobby12
26th September, 2013 @ 04:20 pm PDT

The zoomed-in image from the 12mm lens is pixellated. That is not an attribute of the 12mm lens (or any lens).

Therefore the demonstration shown is a 'con job'.

T N Args
26th September, 2013 @ 06:28 pm PDT

This is one of those little step ups in tech that has wide reaching benefits for all. Well done !

Nairda
27th September, 2013 @ 12:10 am PDT
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