Ring light guide
US7127163B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2004 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Feb 8, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2215/0539
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ring illuminator (20) has a light channeling section (22) with an input face (24) optically coupling the light channeling section (22) to a flash unit (16) of a camera (12) for obtaining flash illumination therefrom. A ring section (26) is optically coupled to the light channeling section and extends around an aperture for fitting the ring illuminator around a lens (14). The ring section has a rear surface (30) for positioning toward the body of the camera. The rear surface has a plurality of light redirecting features (28) for redirecting at least a portion of the flash illumination from within the ring section outward from the camera, around the lens of the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.