Breathable membrane for lens assembly having a second lens barrel positioned within and removeable from a first lens barrel
US11493831B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2020 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Sep 16, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/55
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Breathable membranes for lens assemblies are described. For example, a system may include a lens barrel having an inner channel extending from a first end of the lens barrel to a second end of the lens barrel. The lens barrel can include one or more inner lenses positioned within the inner channel. The lens barrel has a vent hole in a side of the lens barrel that extends from the inner channel to an exterior surface of the lens barrel. The system includes a membrane attached to the lens barrel and positioned to cover the vent hole. The membrane has pores large enough to permit nitrogen gas to flow through the membrane and the vent hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.