BACKGROUND LIGHT INTENSITY ADAPTIVE ILLUMINATING LIGHT SYSTEM

摘要

an optical combiner operative to permit a scene to be viewed therethrough and to reflect light to a viewer; a light source arranged with respect to said optical combiner such that light from said light source is reflected to said viewer as an aiming dot,said light source comprising an ambient light collector;and an attenuating compensator,compensating for variations in intensity of ambient light thereby to cause said aiming dot to have a generally uniform size.