Light shielding construction for the forward end of an endoscope
US4646721A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Aug 23, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/05
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endoscope includes in the viewing head of its insertable section into a cavity of a living body an image sensor for generating a video signal which in turn is transmitted to a television display to be visualized thereon as a television picture. The image sensor with a shape such as a plate is located in a plane containing the longitudinal center line of the viewing head. According to the present invention, a mask having an opening formed at a position opposed to an image area of the image sensor is provided, so that any light other than the light contributing to the image formation can be prevented from falling into the image sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.