Camera and illuminator for iris imaging in cell phones and tablets
US9465988B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2014 |
| Grant date | Oct 11, 2016 |
| Priority date | — |
| Expiry date | Jan 20, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/19
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic device including an illuminator and a camera configured for performing iris recognition while the user holds the device. The lens of the camera comprises four molded plastic elements with eight aspheric surfaces at a total thickness of only 3.4 mm that provides a mildly distorted image 1.2 mm across. The relative aperture is 3.5 with a fixed focal distance, providing a depth-of-field spanning a fixed focus region of at least 10 cm in depth that is 25 to 35 cm (centimeters) from the eye. The illuminator comprises a near-IR LED in a Cassegrain telescope configuration for efficient directing of flux toward the eye, thereby conserving device volume and electric energy use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.