Patent ID: 7099092
Filing Date: 2006-08-29
Classification: G02B

Abstract:
1. A single focus wide-angle lens for forming a real image of an object that is positioned on the object side of the single focus wide-angle lens, the single focus wide-angle lens comprising, arranged along an optical axis in order from the object side: a first lens component of positive refractive power, having a meniscus shape, and having a convex object-side surface; a stop; a second lens component of positive refractive power, having a meniscus shape, having at least one aspheric surface, having a concave object-side surface, and being made of plastic; and a third lens component of negative refractive power, having both surfaces of aspheric shape, having an image-side surface that is concave on the optical axis, and being made of plastic; wherein the following conditions are satisfied: where R f f is the paraxial focal length of the entire single focus wide-angle lens, and θ is the half-field angle at the maximum image height.