Peripheral filtering optical eyeglasses
US8602554B2 · kind B2 · utility
6Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2009 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Sep 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A filter or lens for common optical apparatus includes a clear center portion and an attenuating peripheral portion where the peripheral portion attenuates off-axis images and passes on-axis images with high signal to noise ratios yet not completely blocking the off-axis images, which lens is well suited for reducing off-axis glare in the optical apparatus that may be handheld optical apparatus such as binoculars, telescopes, cameras, and eyeglasses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.