Optical imaging system, image capturing device and electronic equipment

• Main Authors: ZHOU JIANGYUN, YE ZHAOYI, MAI HONGQUAN, YANG YAZHU, CHEN ZHONGJUN
• Format: Patent
• Language: Chinese; English
• Published: 21.01.2022
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses an optical imaging system, an image capturing device and electronic equipment. An optical imaging system includes a first lens, a diaphragm, a second lens, a third lens, an infrared filter and a fourth lens which are sequentially arranged along an optical axis from an object side to an image side, the first lens and the third lens have positive focal power, the fourth lens has negative focal power, the optical imaging system satisfies the following conditions: -10 < f3/f4 < 0, -5 < f/f2 < 10 and -5 < f/f4 < 0, f is the total effective focal length of the optical imaging system, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens. The infrared filter is located between the image side face of the third lens and the object side face of the fourth lens so as to restrain the incident angle of light rays to the infrared filter from being within 20 degrees, and therefore the offset of