Zhejiang Dahua Technology Co., Ltd.

Shenzhen Yinwang Intelligent Technologies Co., Ltd.

Wenqiang Pan

Kai Liu

Hongxing Ding

Kai An

Daniel Manssen

Uensal Kabuk

The present disclosure is related to a lens systems. The lens system includes, in order from an object side to an image side, a first lens group Ghaving negative refractive power, a second lens group Ghaving positive refractive power, a third lens group Ghaving positive refractive power, and the lens system satisfies the following condition: and at least partial of Gis made of material satisfying the following condition: Vd&#x3e;g and dn/dt&#x2264;h, wherein a, b, c, d, e, f, g and h are constants, frepresents a focal length of Gfrepresents a focal length of Gfrepresents a focal length of Gf' represents a focal length of the lens system, Vd represents an abbe constant, n represents a refractive index, t represents temperature, and dn/dt represents a differential of refractive indices against temperature.

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Hangzhou, China

Wenqiang Pan