Abstract: A thin aspheric lens group for mobile phone comprises three lens elements with refractive power, from the object side to the image side, a first lens element with positive refractive power, a second lens element with negative refractive power, and the third lens element with negative refractive power, and an aperture stop located between the first lens and the second lens. The plastic lens APL5014DO、POLYSTYR and ARTOND4531 are chosen. The Fnumber is 2.4 and FOV is 58.The length of the total lens group of this optical system is 2.19mm. The MTF at 295lp/mm is higher than 0.2.