Video endoscope aperture wheel drive system
US4901144A · kind A · utility
4Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Jul 20, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/042
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A video endoscope aperture wheel drive system effective to position a predetermined aperture formed in an aperture wheel in an optical path of an image generated by an imaging device viewing an object, while eliminating oscillation of the aperture wheel caused by the rotational stepping of the aperture wheel in either direction in response to movement of a video probe in which an imaging device is positioned. The aperture wheel motor is rotated clockwise or counter-clockwise in response to the proximity of the imaging device relative to the object being viewed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.