Sony’s optical system patents such as “12mm F2.8”, “14mm F2”, “20mm F1.8”, etc.
overview
- Patent 7428179
- [Registration date] 2024-01-29
- [Publication date] 2024-02-06
- [Name of the invention] Optical system and imaging device
- [Application date] 2020-03-18
- [International release date] 2020-10-22
- [Patent Holder]
[Identification Number] 000002185
[Name] Sony Group Corporation - BACKGROUND ART
[0002]
In recent years, digital cameras with interchangeable lenses have rapidly become popular. As a wide-angle lens with a large aperture ratio and a bright F value for use in an interchangeable lens digital camera, many retrofocus type optical systems that ensure a long flange back have been proposed (see Patent Document 1). - [Summary of the Invention]
On
the other hand, with the spread of mirrorless digital cameras, there is a demand for the development of a compact optical system with a short overall optical length that takes advantage of the short back focus. - [0005]
It is desirable to provide an optical system that is compact and has good optical performance despite having a large aperture ratio, and an imaging device equipped with such an optical system.
Example 1
- Focal length: 14.42
- F value: 2.06
- Half angle of view: 56.09
- Image height: 21.63
Example 2
- Focal length: 19.05
- F value: 1.85
- Half angle of view: 30.12
- Image height: 21.63
Example 3
- Focal length: 14.42
- F value: 2.88
- Half angle of view: 56.09
- Image height: 21.63
Example 4
- Focal length: 23.28
- F value: 1.46
- Half angle of view: 42.77
- Image height: 21.63
Example 5
- Focal length: 12.36
- F value: 2.88
- Half angle of view: 60.16
- Image height: 21.63
Example 6
- Focal length: 33.95
- F value: 1.46
- Half angle of view: 32.38
- Image height: 21.63
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