Imaging optical system including optical element having discontinuous plane
US7492534B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2005 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Nov 3, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4211
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging optical system capable of moving a meridian image plane further closer to an ideal imaging plane vertical to an optical axis with the number of lenses kept constant. At least one plane of at least one optical element and including at least one optical element is divided into at least one zonal area surrounding an optical axis and a center area including the optical axis. When the first area of a meridian image plane, on which a meridian ray of light passing through one of the at least one zonal area and the center area images, displaces to an image side from the reference image plane of the imaging optical system and the second area of a meridian image plane, on which a meridian ray of light passing through the other of the at least one zonal area and the center area images, displaces to an object side from the reference image plane of the imaging optical system, the boundary between the at least one zonal area and the center area is made discontinuous so that the first and second areas approach the reference image plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.