Prism construction for simultaneous zero-degree and oblique illumination of a stereoscopic surgical microscope
US6914721B2 · kind B2 · utility
4Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2002 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Oct 6, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention concerns an apparatus for simultaneous zero-degree and oblique illumination for an optical viewing device, in particular a stereoscopic surgical microscope, which contains a shiftable prism combination (3) for deflecting a first illumination sub-beam a long distance from the optical axis (12) of the main objective in order to obtain an oblique illumination beam (9) (oblique illumination), and for deflecting a second illumination sub-beam (8) a short distance from the optical axis (12) of the main objective in order to obtain a zero-degree illumination (8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.