Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Better photos from your mobile

22.05.2007
Every year, between 600 and 800 million mobile telephones are sold all over the world. However, unlike ordinary cameras, mobile phone cameras are not equipped with autofocus.

Because of their small aperture, they already offer reasonable sharpness, but poor light can make it difficult to take pictures indoors, and the results are often out of focus. In the future, some mobile telephones will be equipped with two cameras, and we can also see a trend in the direction of functions such as autofocus and zoom becoming more and more common.

The Horton company Ignis Display saw interesting possibilities in this area, and it contacted SINTEF, which had some ideas about how this functionality could be transferred from ordinary camera to mobile telephones. A project is already under way, and as well as being able to focus extremely rapidly, the new lens will also be inexpensive and be of good optical quality.

“Eye-blink”

The idea is based in principle on the way that the eye functions with its own autofocus mechanism. In human beings, as in all mammals, the lens consist of a soft transparent substance. Round the lens is a muscle that controls the thickness of the lens according to the distance on which we wish to focus. For objects close to us, the muscle relaxes, so that the lens becomes thicker in the middle, while it contracts and the lens becomes thinner when we focus on objects at greater distances. Ignis Display’s new lens is also made of soft material, a low-density polymer that can be easily formed and that can change its shape almost like a muscle. The polymer is installed on a silicon circuit together with piezoelectric elements which convert electrical signals to mechanical forces and give the polymer whatever lens shape is required.

The scientists started by building a demonstration version of the lens with nuts and bolts and wires in order to demonstrate that the principle would work.

“Our first prototype will soon be ready for testing, and we will continue to improve and miniaturise it. This has been an interdisciplinary project in which our ceramics scientists have developed a robust and stable piezoelectric element, while the plastics scientists have been working on the polymer,” says senior scientist Dag T. Wang of SINTEF ICT.

Production

The next stage will be that scientists at Ignis Display and SINTEF – in collaboration with other partners – will continue the process of miniaturisation and the development of a suitable manufacturing technology.

The technology employed in making the lenses involves producing not just one lens or chip, but between one hundred and a thousand items at a time, depending on the size of the silicon wafer used. This approach is essential if Ignis Display is to compete on the international market with a reasonably priced product.

“We deposit material on silicon wafers that have space for a large number of chips. Then we place a mask over the wafer, create the pattern of the circuit on it by photolithography and etch it. We produce large numbers of identical circuits every time. What makes our production of micro-sized structures possible is the fact that we have been working on ceramics and piezoelectric materials in SINTEF for many years,” says Wang.

The people at Ignis Display bring together several wafers and install the polymer, before integrating the tiny lens module with the necessary electronics and other lens elements.

Growing market

Today, virtually all mobile telephones have at least one camera. Many people in the industry believe that it is only a matter of time until telephones will be equipped with two; one on each side, for conferences and presentations via mobile telephone. Given the steady increase in the number of mobile telephones sold, and a doubling of the number of cameras in each unit, there is obviously a lot of money to be made in this field.

Ignis Display ‘s technology has aroused a great deal of interest both in Norway and abroad. Although the company has several competitors, Ignis Display believe that it is likely that millions of mobile cameras will be taking photographs with its lenses within a few years.

By Jan Helstad/Åse Dragland.

Aase Dragland | alfa
Further information:
http://www.sintef.no

More articles from Information Technology:

nachricht New technology enables 5-D imaging in live animals, humans
16.01.2017 | University of Southern California

nachricht Fraunhofer FIT announces CloudTeams collaborative software development platform – join it for free
10.01.2017 | Fraunhofer-Institut für Angewandte Informationstechnik FIT

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>