Optical filter for an objective system of an endoscope, objective system, and endoscope
US12419506B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 1, 2022 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Feb 19, 2044 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/0638
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An objective system of a medical scope including an optical filter is disclosed. The optical filter includes a light incident side and a light exit side, a central region around an optical axis, and a peripheral region and is designed as an aperture with a single optical axis for white light and fluorescence light. The optical filter includes a first transmission zone for a transmittance of a first wavelength band and a second transmission zone for a transmittance of a second wavelength band at least partially different from the first wavelength band. At least one of the two transmission zones includes a filter coating. As a result, when both white light and fluorescence light pass the optical filter, a light beam cone of the fluorescence light has a larger diameter than a light beam cone of white light or vice versa. The invention also discloses a related endoscope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.