Endoscope with low distortion
US5980453A · kind A · utility
22Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Jun 26, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/398
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An endoscope with an eyepiece and an objective lens system used for observing an object in an environmental media. The distal most optical element in the objective lens system is a spherical lens. The spherical lens has a curved distal surface that contacts the environmental media. The objective lens system facilitates the control of the distortion in an image generated by the objective lens system to approximate a reverse distortion of the eyepiece system measured as the distortion in an image generated distally of the eyepiece system of an object positioned proximally of the eyepiece system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.