Capsule endoscope
US6939295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2003 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Aug 6, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A capsule endoscope is disclosed having an illumination means, an imaging system that includes an objective optical system, and a transparent cover. The invention is characterized by one of: (1) the transparent cover has a larger radius of curvature in a central region of the field of view of the objective optical system than the radius of curvature of the transparent cover in a peripheral region of the field of view of the objective optical system, or (2) the imaging system has a different near point of focus distance for a central region of the field of view than the near point of focus distance of a region that is peripheral to the central region of the field of view and the objective optical system includes a meniscus lens element of positive refractive power and a plano-convex lens element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.