Optical movement sensing system
US7723669B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2007 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Dec 14, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There is provided an optical movement sensing system which can be miniaturized and ensures a wide angle of view. The optical movement sensing system collecting light reflected from an object to be imaged on an optical sensor, the optical movement sensing system including: a wide-angle lens including a first lens element having a curved object-side surface; and a second lens element having an object-side surface in contact with an image-side surface of the first lens element and having a planar image-side surface. The optical movement sensing system with this configuration can be reduced in size and weight and has a wide angle of view. Therefore, the optical movement sensing system is applicable to a mobile device such as a mobile telecommunication terminal and assures sufficient peripheral light amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.