Optical system for non-flexible endoscopes
US6049422A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1999 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Mar 25, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2446
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An optical system for non-flexible endoscopes comprising an illumination optical system and an observation optical system which are disposed in an insert section, wherein the observation optical system comprises, in order from a tip thereof, an objective optical system and a single cycle type relay optical system, and an outside diameter D1 of a lens component in the objective optical system whichever has a largest outside diameter, an outside diameter D2 of a lens component in the relay optical system whichever has a largest outside diameter and an outside diameter D3 of the insert section are in relationship expressed by the following conditions (1) and (2): EQU L/D1<20 (1) EQU 0.7<D2/D3<0.9 (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.