Optical system

Abstract

An optical system includes an optical module. The optical module is with positive refractive power and includes a first lens, a second lens, and a third lens. The first lens is with refractive power and includes a convex surface facing an object side. The second lens is with refractive power. The third lens is a biconcave lens with negative refractive power and includes a concave surface facing the object side and another concave surface facing an image side. The first lens, the second lens, and the third lens are arranged in order form the object side to the image side along the optical axis.

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