SINGLE LENS OPTICAL SYSTEM

摘要

PURPOSE: A single lens optical system is provided to reduce distortion. CONSTITUTION: A lens(10) has a positive refractive power and both sides of the lens is formed in a non-spherical shape. The lens convexly forms the first side(S2) of an object side(O) and the second side(S3) of an image side(I). The lens reduces distortions in a biconvex shape. An infrared filter(20) is arranged in the upper side of the lens.