Variable focal distance lens system and imaging device
US12181647B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2019 |
| Grant date | Dec 31, 2024 |
| Priority date | — |
| Expiry date | Feb 22, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A first lens unit and a third lens unit are constituted by a lens which is rotationally symmetrical with respect to an optical axis and are disposed on the same optical axis, a first freeform-curved surface lens and a second freeform-curved surface lens have the same shape and are disposed to be rotated at 180 degrees with respect to the optical axis. Further, a refractive power of a second lens unit is variable due to the first freeform-curved surface lens and the second freeform-curved surface lens moving in opposite directions. The first freeform-curved surface lens and the second freeform-curved surface lens are moved in the Y-axis direction in association with movement of some of lens groups constituting the first lens unit and the third lens unit when positional states of the lenses are changed from a wide-angle end state to a telephoto end state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.