Variable focal length lens apparatus
US11237354B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Oct 16, 2018 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Jan 2, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/55
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A variable focal length lens apparatus includes an objective lens and an imaging lens that are aligned on the same optical axis; a front side lens system and a rear side lens system that are disposed in a section between the objective lens and the imaging lens on the optical axis, and change a refractive index in accordance with an input drive signal; and a diaphragm disposed in the section between the front side lens system and the rear side lens system on the optical axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.