An imaging lens system includes a lens and a transparent plate. The lens is disposed between an object and a sensor, and the lens includes a flat surface facing the object and an aspheric surface facing the sensor. The transparent plate is connected to the lens and disposed between the object and the lens. An abbe number of the lens is in a range from 30 to 50, an abbe number of the transparent plate is in a range from 40 to 60, and an effective focal length (EFL) of the imaging lens system is in a range from about 0.3 millimeters to about 0.4 millimeters.一種影像透鏡系統包含透鏡與透明板。透鏡設置於物體與感測器之間,且透鏡包含朝向物體之平面以及朝向感測器之非球面。透明板與透鏡連接且設置於物體與透鏡之間。透鏡之阿貝數在30至50的範圍內,透明板之阿貝數在40至60的範圍內,且影像透鏡系統之有效焦距在大約0.3毫米至大約0.4毫米之間。100‧‧‧影像透鏡系統110‧‧‧透鏡120‧‧‧透明板130‧‧‧孔徑光闌132‧‧‧開口200‧‧‧物體300‧‧‧感測器310‧‧‧像平面A‧‧‧光軸D1‧‧‧直徑D2‧‧‧直徑W1‧‧‧寬度S1‧‧‧表面S2‧‧‧平面S2’‧‧‧表面S3‧‧‧非球面
