“In smartphones, image sensors provided by companies such as Sony and OmniVision are on par with low to mid-priced standalone cameras. Software for control and processing in high end smart phones is better than many low to mid-price standalone cameras. However, the biggest weaknesses of typical smart phone cameras are the lens and the shutter equivalent,” Arora reports. “There is a reason that professionals still use digital single lens reflex (DSLR) cameras. DSLR cameras allow for control of both shutter speed and lens aperture. Compared to fixed lens cameras DSLR allows the photographer a wide aperture range. By changing the aperture, the photographer can change the depth of field of the picture.”
“The conventional SLR technology cannot be easily adapted to smart phones due to the size of the lens and associated mechanisms. A promising new technology for optics and cameras has been electroactive polymers (EAP). An EAP changes its shape when exposed to an electric field. Starting with a rubber band experiment in 1890, there has been a steady progression of innovation in EAPs. In due course EAPs have also come to be known as ‘artificial muscle’; just like a muscle, EAPs can be made to contract, expand or rotate. Using an EAP for the optics in a smart phone camera is the next frontier. With EAPs the lens and the associated mechanism can be made small enough to fit within the profile of a typical smart phone,” Arora reports. “Apple has made significant progress in using EAPs in a smart phone as a camera lens, as is evidenced by its filing with the United States Trademark and Patent Office.”
Read more in the full article here.
Apple invents iPhone camera lens actuator made of artificial muscle – June 19, 2014