Objective lens unit for endoscope
US7695431B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Feb 5, 2004 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Apr 1, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An objective optical system is configured to be suitable to be implemented at a tip of an endoscope. The objective optical system is provided with a first lens unit having a first lens barrel and a first optical system including plurality of lens elements assembled in the first lens barrel, and a second lens unit having a second lens barrel and a second optical system including a plurality of lens elements. The first lens unit or the second lens unit includes an alignment lens which is movable in a direction perpendicular to the optical axis thereof. The alignment lens is a lens most sensitive with respect to an alignment error among the plurality of lenses included in the first optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.