Medical device for the observation of a partly fluorescent object, using a filter system with a transmission window
US11517188B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2017 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Mar 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a medical device (1) for the observation of a partly fluorescent object (2) such as tissue (3) comprising at least one fluorophore (4). The fluorophore (4) absorbs light in at least one spectral excitation waveband (46) and emits fluorescent light in at least one spectral emission waveband (54). In order to be able to observe also non-fluorescent regions in the tissue (3) without complicated filter arrangement, the medical device (1) according to the invention comprises at least one filter system (16, 38) which comprises, in a filter plane (18), comprises a filter area (20) and a transmission window (22). The filter area (20) comprises a band pass filter (24) having at least one passband (44) comprising the at least one excitation waveband. The transmission window has a passband (48) which is wider than the passband (44) of the filter area (20). In particular, a filter layer (64) of the filter area (20) may be missing in the transmission window (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.