Adjustable focal length lenses and eyewear incorporating the same
US12222586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2020 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Oct 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Adjustable focal length eyewear (11) comprising two lenses (21, 22) that are mounted to a frame (14, 15, 16) for supporting the lenses (21, 22) in front of a user's eyes. At least one of the lenses (21, 22) is a variable focal length lens of the kind comprising two superposed lens elements (31, 41) having cooperating optical surfaces that are shaped such that the focal length of the variable focal length lens (21, 22) is variable according to the relative lateral disposition of the lens elements (31, 41). One of the lens elements (31) is fixedly mounted to the frame (14, 15, 16) and the other lens element (41) is movable manually relative to the fixed lens element (31) for varying the focal length of the variable focal length lens (21, 22). Guiding parts (81, 82) are provided on the movable lens element (41) which cooperate with corresponding guiding parts on the fixed lens element (31) or the frame (14, 15, 16) to define and constrain movement of the movable lens element (41) relative to the fixed lens element (31) to a transverse path that extends across the viewing direction. One or more releasable fasteners are provided for releasably fastening the movable lens element (41) to …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.