US Patent 7877886 Reticle for stadiametric rangefinding

A reticle for stadiametric rangefinding has a horizontal crosshair and a vertical crosshair that are attached to an optical element. The optical element defines an optical axis and a field of view. The crosshairs intersect perpendicularly at a location that is offset from the optical axis. There may be a plurality of rangefinding indicia shaped to indicate the size of an object at a specific range. The rangefinding indicia may be arranged in a position other than vertical.