Patent ID: 6876500

Claim:
A single focus telescopic lens for forming a real image comprising, arranged along an optical axis in order from the object side: a stop on the object side of the single focus telescopic lens; a first lens component of positive refractive power, having a meniscus shape, having both surfaces of aspheric shape, and having a convex object-side surface; a second lens component of positive refractive power, having a meniscus shape, having both surfaces of aspheric shape, and having a convex object-side surface near the optical axis, wherein the following conditions are satisfied: 0.12 <R 1 /f< 0.40 tan θ<0.45 where R1 is the radius of curvature on the optical axis of the object-side surface of the first lens component, f is the focal length of the entire single focus telescopic lens on the optical axis, and θ is the maximum angle of incidence among all the image forming principal rays on the object-side surface of the first lens component.