Chromatic aberration compensating image optics
US8014081B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2006 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Aug 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging optics capable of compensating for chromatic aberration is provided with a light shielding means in a surface peripheral area of a certain lens element in a lens system so as to block a light flux of a specified wavelength range, thereby eliminating chromatic aberration in halo of the light flux of the specified wavelength range when it passes the periphery of the lens system. Thus, the invention provides the imaging optics that, without an increase in the number of pieces of lens elements and without a use of an expensive specified low-dispersion glass material, in contrast with the prior art imaging optics of the same optical performances, well compensates for chromatic aberration, especially, in halo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.