Illumination system for a surgical microscope
US5126877A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1991 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Sep 4, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is an illumination system for a surgical microscope comprising an illumination assembly (1), which is located outside the optical axis (2a) of the microscope lens, and two reflecting mirrors (4,6) which are located behind the illumination assembly, each directing respective portions of the illumination light to the operating area. The first reflecting mirror (4) directs its portion of the light onto the operating area at an oblique angle (preferably 6.degree.) relative to the viewing axis (2) of the microscope lens. The position of the second reflecting mirror (6) can be adjusted so that its portion of the light is directed to the operating area along a different path that is either (a) coincident with said viewing axis or (b) oblique to the axis at an angle closer than that formed by the path of the light directed by the first reflecting mirror (i.e., between 0.degree. and 6.degree.). By means of respective diaphragm mechanisms (11,12) associated with each of the reflecting mirrors, the two portions of the light may be individually adjusted to control contrast and/or to select (i) 0.degree. illumination, (ii) oblique illumination, or (iii) various combinations of both ty…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.