Endoscope
US11647893B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Mar 24, 2021 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | May 4, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2423
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endoscope includes an insertion observation portion including a distal end portion to be inserted into a target object; an objective lens portion disposed on the distal end portion of the insertion observation portion and includes a lens; a holding member that holds the objective lens portion; a sheath that covers the objective lens portion and the holding member; and a sealing material that is disposed on an outer circumference of the objective lens portion and that shields light. A part of the sealing material is disposed on an inner side of a recessed portion of the lens and forms a diaphragm portion that widens a depth of field of the endoscope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.