Patent ID: 7088528
Filing Date: 2006-08-08
Classification: G02B

Abstract:
1. A single focus lens comprising, arranged along an optical axis in order from the object side: a stop on the object side of the single focus lens; a first lens component of positive refractive power and a meniscus shape, having both surfaces aspheric, and having its convex surface on the object side; a second lens component of positive refractive power and a meniscus shape, having both surfaces aspheric and, at least near the optical axis, having a convex surface on the object side; wherein where R f is the focal length of the entire single focus lens on the optical axis. D f where ΔZF is the object-side shape displacement at the maximum height at which an image forming light ray passes through the object-side surface of the first lens component, and ΔZR is the image-side shape displacement at the maximum height at which an image forming light ray passes through the image-side surface of the first lens component.