Patent ID: 8395691

Claim:
An optical image-capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power; a second lens element with negative refractive power; a third lens element, the object-side and image-side surfaces thereof being aspheric; and a fourth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof, wherein the assembly is further provided with a stop and an electronic sensor for image formation of an object, the stop is disposed between the object and the second lens element, the electronic sensor is disposed at an image plane, a light ray having an incident angle of 36.5 degrees with respect to an optical axis and passing through a center of the stop intersects the image-side surface of the fourth lens element at a point, a perpendicular distance from the point to the optical axis is Yc1, half of a diagonal length of an effective pixel area of the electronic sensor is ImgH, a distance on the optical axis between the stop and the electronic sensor is SL, a distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the following relations: 0.35 <Yc 1 /ImgH< 0.95; 0.70 <SL/TTL< 1.20.