Illumination field diaphragms for use in microscopes and related methods and systems
US10409046B2 · kind B2 · utility
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Key dates
| Filing date | Nov 9, 2015 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Nov 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0018
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Field diaphragms for use in surgical microscopes are provided. The field diaphragms are positioned along an optical axis of a microscope illumination system. The field diaphragms include a frame portion configured to be received by the surgical microscope; and a non-circularly symmetric mask portion integrated with the frame portion. The mask portion is aligned such that marginal rays from an edge of the field diaphragm along a meridian of minimum diameter that reflect from a surface of an objective lens of the microscope reflect outside of an acceptance angle for relay through any ocular channel of the microscope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.