Illumination system for endoscopes
US6036343A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Oct 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4249
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system for endoscopes includes a light source device having an arc discharge lamp and a light source optical system; a light guide cable; and a rigid endoscope provided with a light guide on a scope side and an objective optical system, using lenses as a relay optical system. The light source optical system projects the light-emitting section of the arc discharge lamp on the entrance face of the light guide cable at a magnification of approximately 1.times., and the light guide cable satisfies the following conditions: EQU 0.25.times.Mg1.sup.1/2 <DL/DS<0.5.times.Mg1.sup.1/2 EQU 0.8<Mg1.times.(DC/DL)<1.2 where DS is the outside diameter of a scope, DC is the diameter of the light guide cable, DLis the diameter of the light guide on the scope side, and Mg1 is the projection magnification of an optical element interposed between the light guide cable and the light guide on the scope side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.