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2024

Xiaomi "zoom lens and shooting device" patent published

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Recently, according to information from the State Intellectual Property Office, Beijing Xiaomi Mobile Software Co., Ltd. applied for a patent called "Zoom Lens and Shooting Device", the publication number is CN118946840A, and the application date is March 2023.

The patent abstract shows that a zoom lens which is small and thin as a whole, and which is wide-angle and bright, and an imaging apparatus equipped with such a zoom lens are provided. The zoom lens includes, in order from the object side, a first lens group having positive or negative refractive power, a second lens group having negative refractive power, and a third lens group having positive refractive power. When the magnification is changed from the wide-angle end to the telephoto end, the first lens group does not move, and the second lens group and the third lens group move through mutually different trajectories so as to make the interval smaller, and satisfy the following conditional expressions (1) and (2),(1)f3/√(fw×ft)≤ 1.10(2) − 0.08 ≤ m2/OAL≤ 0.08 where f3: focal length of the third lens group fw: focal length of the entire optical system in the wide-angle end ft: focal length of the entire optical system in the telephoto end m2: the movement amount OAL of the second lens group to the image side from the wide angle end to the telephoto end: the total length of the zoom lens from the object plane to the image plane.