Patent ID: 6353509
Filing Date: 2002-03-05
Classification: G02B

Abstract:
A wide-angle lens consisting of three lens groups having no more than 6 refractive lens elements, as follows, in order from the object side:a first lens group which has negative refractive power and consists of a meniscus lens element with its convex surface on the object side; a second lens group which has positive refractive power and consists of biconvex lens element; a third lens group which has positive refractive power and consists of four lens elements having refractive power, said third lens group being formed of, in order from the object side, a biconcave third lens element, a positive fourth lens element having a convex surface on the image side, a positive fifth lens element having a convex surface on the image side, and a positive sixth lens element having a convex surface on the object side; and a diaphragm that is arranged between the second lens group and the third lens group.