Optical imaging system including six lenses of +---++, or seven lenses of --+-++-, +-+--++, -++-+-- or -++-++- refractive powers
US11803034B2 · kind B2 · utility
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4References
13Claims
0Family size
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Key dates
| Filing date | Aug 28, 2020 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | Aug 26, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/55
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical imaging system includes a first lens group including a first lens and a second lens, a second lens group including a third lens, a fourth lens, and a fifth lens, and a third lens group including a sixth lens and a seventh lens. The first to seventh lenses are arranged in order from an object side, at least one of the first lens group to the third lens group is moved on an optical axis to change a distance between the first lens group to the third lens group, and the following conditional expression is satisfied: 0.2<BFL/(2*IMG HT)<2.0
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.