Endoscope device and method with illumination fiber bundles having multiple numerical apertures
US11213192B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2019 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Mar 16, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/267
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An optical scope includes a body and an elongated shaft. The shaft distal end holds an optical assembly including an imaging lens with a field of view of at least 90 degrees. An LED is coupled to the body and has an output numerical aperture (NA) providing a critical angle larger than the field of view. A first pair of fiber bundles have proximal ends receiving light from the LED with distal ends presented at the shaft distal face, and an NA providing a critical angle less than the field of view. A second pair of fiber bundles also receive light from the LED with distal ends having at the shaft distal face, and have an NA providing a critical angle at least as large as the field of view. The bundles are positioned around imaging lens such that they create a light having a desired intensity profile and properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.