Lighting device for a surgical microscope
US6483642B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Nov 9, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to an illumination device for a surgical microscope comprising a main objective lens (1) surrounding a main optical axis (6) and an illumination optical system (2) having a light source (3). Two prisms (4, 5) are provided between the main objective lens (1) and the illumination optical system (2). During operation, the first prism (4) causes part of the light flow from the illumination optical system (2) to be deflected at a small angle to the main optical axis (6) and the second prism (5) causes another part of the light flow from the illumination optical system (2) to be deflected along the main optical axis (6). Both prisms (4, 5) are arranged next to each other. The light entry surfaces (7) of both prisms face the illumination optical system (2) in such a way that light flux can be independently adjusted for the two prisms (4, 5). This results in a compact design and a good light flux distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.