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AssigneeJiangxi Lianchuang Electronic Co., Ltd.
InventorsXuming Liu, Kemin Wang, Jiyong Zeng, Haojie Zeng, Yumin Bao, Weijian Chen
Estimating the term…
A collimator lens system includes a first lens, a second lens, a third lens and a diaphragm from an object side to an image side of the system in turn along an optical axis, in which the first lens is of a positive focal power, and an object side surface thereof is convex; the second lens is of a negative focal power; the third lens is of a positive focal power, and an image side surface thereof is convex; optical centers of all the lenses are arranged along a same straight line, the system meets following formulas: f12>f3; (dn/dt)1<−50×10−6/° C.; (dn/dt)2<−50×10−6/° C.; (dn/dt)3>−10×10−6/° C., where f12 represents a combined focal length of the first and second lenses, f3 represents a focal length of the third lens, and (dn/dt)1, (dn/dt)2, and (dn/dt)3 represent change rates of refractive indices of the first lens, the second lens and the third lens with temperature, respectively.
A collimator lens system, comprising a first lens, a second lens, a third lens and a diaphragm from an object side to an image side of the collimator lens system in turn along an optical axis of the collimator lens system, wherein
Dependencies are inferred from the claim text.