Endoscope
US8994802B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2014 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Jan 16, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An endoscope includes an objective optical system at a distal end of an inserted portion to acquire a subject image; a part that splits the subject image into two optical images focused differently; an imaging device that acquires two images by simultaneously capturing the optical images arranged on an imaging surface; and a part for cutting out at least abutting portions of the optical images on the imaging device, wherein A+B>C+D, where A is half the maximum length of light-receiving regions for the optical images at the imaging surface; where TW is an entry angle at the imaging surface when A is at the maximum image height and d is an optical-path-length difference between the optical images, B=d×tan TW; C is half the length of the light-receiving regions in a direction of the optical images arranged on the imaging surface; and D is a distance between the two light-receiving regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.