Patent ID: 9417036
Filing Date: 2016-08-16
CPC Classification: F41G,G02B

Claim Text:
1. An optical scope, comprising: an objective lens; an eyepiece lens; a reticle disposed between the objective lens and the eyepiece lens; an erecting optical system that erects an image and is disposed between the objective lens and the reticle; and a field lens having negative power disposed between the eyepiece lens and the erecting optical system, wherein the field lens includes a doublet having a first lens with a positive power and a second lens with a negative power, the first lens is closer to the reticle than the second lens, a straight imaginary line is defined from a center of the objective lens to a center of the eyepiece lens, the reticle, the erecting optical system, and the field lens are arranged such that the imaginary line intersects each of the reticle, the erecting optical system, and the field lens respectively, and the doublet has a flat surface and the reticle is in contact with or formed on the flat surface.