Patent ID: 9013808
Filing Date: 2015-04-21
Classification: G02B,H04N

Abstract:
1. An optical imaging system for pickup comprising, in order from an object side to an image side: a first lens element having positive refractive power; a second lens element having refractive power; a third lens element with positive refractive power having an image-side surface being convex in a paraxial region thereof; a fourth lens element with refractive power having both of an object-side surface and an image-side surface of the fourth lens element being aspheric; a fifth lens element with refractive power having both of an object-side surface and an image-side surface of the fifth lens element being aspheric; and a sixth lens element with refractive power having an image-side surface being concave in a paraxial region thereof, wherein both of an object-side surface and the image-side surface of the sixth lens element are aspheric, the image-side surface of the sixth lens element has at least one inflection point, and the sixth lens element is made of plastic material; wherein the optical imaging system for pickup has a total of six lens elements with refractive power, an axial distance between an object-side surface of the first lens element and an image plane is TTL, half of a diagonal length of an effective photosensitive area of an image sensor is ImgH, a tangent line to the image-side surface of the sixth lens element at an off-axis tangent point is perpendicular to an optical axis, a vertical distance between the tangent point and the optical axis is YC, a focal length of the optical imaging system for pickup is f, an axial distance between a stop and the image-side surface of the sixth lens element is SD, an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, and the following conditions are satisfied: