Medical device for the observation of a partly fluorescent object, using a filter system with a transmission window
US11793398B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2022 |
| Grant date | Oct 24, 2023 |
| Priority date | — |
| Expiry date | Oct 18, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a medical device for the observation of a partly fluorescent object such as tissue comprising at least one fluorophore. The fluorophore absorbs light in at least one spectral excitation waveband and emits fluorescent light in at least one spectral emission waveband. In order to be able to observe also non-fluorescent regions in the tissue without complicated filter arrangement, the medical device according to the invention comprises at least one filter system which comprises, in a filter plane, comprises a filter area and a transmission window. The filter area comprises a band pass filter having at least one passband comprising the at least one excitation waveband. The transmission window has a passband which is wider than the passband of the filter area and is cross-shaped. The at least one filter system is configured to simultaneously receive light through the filter area and the entire transmission window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.