Camera objective lens for an endoscope
US10993604B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2018 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Jul 7, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/00188
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A camera objective lens for an endoscope has an object-side first prism and an image-side second prism, a first lens system arranged on the object side of the first prism and a second lens system arranged on the image side of the first prism, and a sensor surface arranged at the image-side end of the camera objective lens parallel to the longitudinal axis of an endoscope shaft of the endoscope. The first prism and the second prism are designed to cause a first to third beam deflection as a three-fold beam deflection. The first lens system includes a biconcave first lens, a biconvex second lens, a third lens formed as a rod lens, a plane-concave fourth lens and a biconvex fifth lens in this order as viewed from the object side. The second lens system includes a convex-plane sixth lens, a seventh lens formed as a meniscus lens, a biconvex eighth lens and a biconcave ninth lens in this order as viewed from the object side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.