Endoscope with at least one reversal system with a non-homogeneous refraction index
US6301043A · kind A · utility
9Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1998 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Dec 31, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2407
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An endoscope having a distally disposed lens and an optical transmission system which transmits the image of the lens to the proximal end of the endoscope is provided. The transmission system includes at least one reversing system, which includes two elements in mutual mirror-inverted arrangement. Each element includes a rod lens with planar faces and at least one optically thin lens having a planar surface. The rod lenses consist of an inhomogeneous material having a positive dispersion and an inhomogeneous refractive index in the radial direction, while the thin lenses are plano-convex lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.