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US 10,895,432 B2Granted
Optical scope
AssigneeIn Jung
InventorsIn Jung, Dong Hee Lee
Life of this patent
Estimating the term…
Abstract
Disclosed is an optical scope including an objective lens, an eyepiece lens, and a reticle, wherein a field lens having negative power is disposed in at least one of a front and a back of the reticle disposed on an image formation surface of the objective lens to increase eye-relief.
Claims15
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
- 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,
- a surface of the field lens towards the reticle is flat, and
- the objective lens, the field lens, the reticle and the eyepiece lens are arranged in sequence.
7 more elements
Dependencies are inferred from the claim text.