Illumination and observation system for an ophthalmic microscope, ophthalmic microscope and microscopying method using four red reflex observation pupils
US10545326B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2016 |
| Grant date | Jan 28, 2020 |
| Priority date | — |
| Expiry date | Aug 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/082
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination and observation system (1) for an ophthalmic surgical microscope (2) has first, second, third and fourth observation pupils (4, 5, 8, 9) for two observers, a coaxial illumination (6, 10, 11) in the first, third and fourth observation pupils to generate a red reflex (13) therein, and a main illumination (7) in the second observation pupil. For widely illuminating the surroundings, the main illumination has a larger illumination field than the coaxial illumination in any of the first, third and fourth observation pupils. For superior observation quality and a visible and homogenous red reflex in the second observation pupil, the main illumination overlaps at least 50% with the second observation pupil. The main illumination may be aligned within ±5° to an optical axis (12) of the second observation pupil and to overlap the coaxial illumination at least 50% with the first, third and fourth observation pupils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.