Lens system and variable focal length lens apparatus
US10705263B2 · kind B2 · utility
0Cited by
0References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2017 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Mar 12, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens system includes a tubular vibrating member that vibrates due to an input drive signal; a case accommodating the vibrating member; a fluid that fills the case and immerses the vibrating member; and a pressure mitigating member that is installed in a gap between the vibrating member and the case, further outward than the vibrating member. A foam body made of fluororubber and having a large number of closed cells is used as the pressure mitigating member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.