Wide-angle image lens with high resolution

摘要

A wide-angle image lens, in the order from the object side to the image side thereof, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and an image plane. The wide-angle image lens satisfies the formulas: D/TTL>1.16;D/L>1.17;Z/Y>0, wherein D is the maximum image diameter of the wide-angle image plane; TTL is the total length of the wide-angle image lens; L is a distance from an outmost edge of an image surface of the fifth lens to an optical axis of the wide-angle image lens; Z is a distance from a central point of the objective surface of the fourth lens to an outmost edge of the image surface of the fourth lens, Y is a distance from the outmost edge of the image surface of the fourth lens to the optical axis.

主权项

1. A wide-angle image lens, in the order from the object side to the image side thereof, comprising:
a first lens having positive refraction power and comprising a first surface facing the object side and a second surface facing the image side; a second lens having negative refraction power and comprising a third surface facing the object side and a fourth surface facing the image side; a third lens having positive refraction power and comprising a fifth surface facing the object side and a sixth surface facing the image side; a fourth lens having positive refraction power and comprising a seventh surface facing the object side and an eighth surface facing the image side; a fifth lens having negative refraction power and comprising a ninth surface facing the object side and a tenth surface facing the image side; and an image plane; wherein the image lens satisfies the following formulas:
D/TTL>1.16;D/L>1.17;Z/Y>0; wherein D is the maximum image diameter of the image plane; TTL is a total length of the image lens, L is a distance from an outmost edge of the tenth surface to an optical axis of the image lens along a direction perpendicular to the optical axis of the image lens, Z is a distance from a central point of the seventh surface to an outmost edge of the eighth surface along the optical axis, Y is a distance from the outmost edge of the eighth surface to the optical axis along a direction perpendicular to the optical axis.