Patent ID: 6088172
Filing Date: 2000-07-11
Classification: G02B

Abstract:
A wide-angle lens comprising, in order from the object side, the following lens elements:a first lens element of negative meniscus shape having at least one aspherical surface with its concave surface on the object side;a second lens element of positive refracting power;a third lens element of negative refracting power;a fourth lens element of positive refracting power; and,a fifth lens element of negative meniscus shape and having at least one aspherical surface with its concave surface on the object side;wherein, the following condition is satisfied-0.9<(R.sub.1 -R.sub.2)/(R.sub.1 +R.sub.2)where,R.sub.1 is the radius of curvature near the optical axis of the object side of the first lens element, andR.sub.2 is the radius of curvature near the optical axis of the image side of the first lens element.