Fingerprint scanners are an essential feature in the smartphone market. Here's how they work and what you need to know about them.

Optical scanner An optical scanner shines a bright light over your fingerprint to capture a digital photograph which is then fed into your computer for further verification.

EO scanners work a lot like a traditional scanner does: they use bright lights to illuminate the peaks and valleys of the print and a CCD device to capture a black and white image—white areas ...

CLEVELAND, Ohio – Optical scanners are the most popular means of collecting Ohioans' votes. The systems can quickly compile voter selections, and testing shows they are very accurate. They are ...

Biomedical engineers at Duke University have developed a low-cost, portable optical coherence tomography (OCT) scanner that promises to bring the vision-saving technology to underserved regions ...

Samsung's next Galaxy S phone is rumored to have an optical fingerprint scanner. Samsung manufacturing partner Synaptics just announced one of its own. Coincidence?

These scanners work by using an optical image of your fingerprint, combined with capacitive sensing to detect the presence of a real finger.