Optical sight with biaspheric element - with concave side of element being parabolically shaped and provided with reflecting layer

摘要

In the concave-convex optical element for a parallax free sight the concave side of the elements to face the user of the sight is provided with a partially reflecting layer, in the focal point of which is arranged a light emitter. The concave side of the optical element is parabolically shaped and in that the opposite convex side of the element is elliptically or hyperbolically shaped, such that any external light beam hitting it along the optical axis of the element continues straight through the element with minimal deviation. The element is moulded in one piece from a plastics material.