METHODS FOR FORMING SIGHTING OPTICS INCLUDING FORMING AN OPTICAL ELEMENT HAVING A PLURALITY OF TRANSPARENT RINGS AND SIGHTING OPTICS FORMED BY SUCH METHODS

摘要

Sighting optics include a front sight and a rear sight positioned in a spaced-apart relation. The rear sight includes an optical element having a first focal length and a second focal length. The first focal length is selected so that it is about equal to a distance separating the optical element and the front sight and the second focal length is selected so that it is about equal to a target distance. The optical element thus brings into simultaneous focus for a user images of the front sight and the target.