Television camera for endoscopes provided with an optical low-pass filter
US4805028A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1987 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Oct 19, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/555
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to effectively eliminate moire without requiring the preparation, on hand, of various types of adapters and to make it possible to obtain an image of high resolution, a television camera is arranged that a plurality of optical low-pass filters having mutually different optical characteristics are housed within the camera body so as to place either one of these optical low-pass filters into the photographic optical path by external manual operation, or arranged that a plurality of optical low-pass filters having mutually different optical characteristics disposed on the photographic optical path are housed within the camera body so as to rotate at least one of these optical low-pass filters about the optical axis by external manual operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.