Endoscope
US4558691A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1984 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | Jul 6, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/36
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endoscope includes an indicating index disposed between an objective optical system and an image transmitter so as to be movable in cooperation with the objective optical system through a cam mechanism and a stationary reference index disposed in a path for transmitting an image of an object to be observed, so that measurements of an actual size of the object, a magnification of the objective optical system, an object distance and the like can be made in a reliable manner based on the positional relationship between the indicating index and the stationary reference index, although the objective optical system moves due to a focus adjustment operation. In addition, an endoscope is provided with a plurality of the stationary reference indexes so that the above mentioned measurements can be made in a reliable manner, although the objective optical system moves by operation of an angle of view converting apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.