Canon patents for a Canon 9.5mm F2.8 and 11.7mm F2.8 PZ lens have been found. You can check them out below:
overview
- [Publication number] P2025070387
- [Release date] 2025-05-02
- [Title of invention] Optical system and imaging device
- [Application date] 2023-10-20
- [Applicant]
[Identification number] 000001007
[Name or company name] Canon Inc. - A small and lightweight wide-angle optical system is provided, in which optical elements such as an iris diaphragm, an ND filter, and a shutter are disposed in appropriate positions.
- [Background Art]
[0002]
Imaging devices such as digital cameras, smartphone cameras, car cameras, and security cameras require small, lightweight optical systems with good optical performance over the entire angle of view. Smartphone cameras in particular often use small, fixed-aperture, single-focus optical systems that use plastic-molded aspheric lenses. In addition, they are required to be equipped with an iris diaphragm, ND filter, and shutter while being short in overall length, which is suitable for video imaging. - [0005]
However, in the optical system of Patent Document 1, even if an iris diaphragm, an ND filter, and a shutter for video imaging are arranged near the aperture diaphragm so as to make the outer diameter of the lens device that houses them as small as possible, there is not enough space to arrange them. Furthermore, if they are arranged away from the aperture diaphragm, the outer diameter of the lens device becomes large. - The present
invention provides a small and lightweight wide-angle optical system while arranging optical elements such as an iris diaphragm, an ND filter, and a shutter at appropriate positions.
Example 1
- Focal length: 9.47
- F-number: 2.88
- Half angle of view: 47.57
- Image height: 10.36
- Overall length: 27.22
- Back focal length: 7.41
Example 2
- Focal length: 11.68
- F-number: 2.88
- Half angle of view: 41.11
- Image height: 10.19
- Overall length: 27.14
- Back focal length: 7.56
Example 3
- Focal length: 6.75
- F-number: 1.85
- Half angle of view: 46.56
- Image height: 7.13
- Overall length: 18.77
- Back focal length: 3.35
Example 4
- Focal length: 8.41
- F-number: 2.88
- Half angle of view: 50.47
- Image height: 10.19
- Overall length: 29.95
- Back focal length: 7.16
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