Patent ID: 9631896
Date: 2017-04-25
CPC Classifications: F41G

Claim:
1. An optical system that facilitates aiming of a projectile, the optical system comprising: an objective lens that is configured to receive and guide light rays to a front focal plane, wherein a distance of the objective lens to the front focal plane is defined by a front focal length; a rear focal plane that is configured to receive converged light rays through a center of the rear focal plane, the rear focal plane is disposed at a rear focal length from an eyepiece lens, wherein the rear focal length facilitates transfer and refocusing of the converged light rays from the center of the rear focal plane to the eyepiece; an erector lens located between the front and the rear focal planes, the erector lens is configured to transfer the received light rays from the front focal plane to the rear focal plane, wherein the transferring of the received light rays includes changing inverted angles of the received light rays into converged light rays that is received through the center of the rear focal plane; an adjustable reticle disposed to coincide with the rear focal plane, the adjustable reticle includes a center that is adjusted to lie on the converged light rays at the center of the rear focal plane, wherein a calibration of the optical system includes aligning the center of the adjustable reticle to lie on an optical axis of the optical system; a stationary reticle disposed at the eyepiece lens, wherein the stationary reticle, objective lens, erector lens, and the eyepiece lens are disposed concentrically with one another, wherein each center of the stationary reticle, objective lens, erector lens, and the eyepiece lens lie at the optical axis of the optical system, wherein the calibration of the optical system places the center of the adjustable reticle to be concentric with the centers of the stationary reticle, objective lens, erector lens, and the eyepiece lens.