Compact liquid lens having an adjustable focal length
US12216295B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 29, 2019 |
| Grant date | Feb 4, 2025 |
| Priority date | — |
| Expiry date | Sep 2, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0076
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a lens (1) having an adjustable focal length, comprising: a container (2) enclosing an internal space (3) of the container (2), wherein the internal space (3) is filled with a transparent liquid (L), and wherein the container (2) comprises a circumferential lateral wall (20) surrounding said internal space (3), wherein the lateral wall (20) is connected to a transparent cover element (21) and to a transparent and elastically deformable membrane (22) such that the liquid (L) is arranged between the membrane (22) and the cover element (21), an annular lens shaper (4) connected to the membrane (22) so that an inner circumferential edge (40) of the lens shaper (4) defines a central area (23) of the membrane (22) and light passing said area (23) is refracted depending on a curvature of said area (23), and an actuator configured to move the lens shaper (4) towards or away from the cover element (21) to adjust said curvature of said area (23) of the lens (1) and therewith the focal length of the lens (1), wherein for moving the lens shaper (4), the actuator comprises a coil (6) integrated into the lateral wall (20), wherein the actuator is configured to generate a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.