Optical combinar assemblies, eg for aircraft head-up displays

Keywords: Patents, Aircraft

In GB Patent GB 2353017 Marconi Electronic Systems Limited describe a combiner assembly. It has an optical combiner mounted to a housing which is futher arranged for mounting to a roof structure of a flight deck of an aircraft. The combiner is mounted within a frame which is mounted to the housing. The frame has a first pivot point which is attached to a first arm which is also attached to the housing at a second pivot point located at a position remote from the first pivot point. The arm is arranged to allow the combiner to rotate around the housing between a deployed position and a stowed position. A second arm is pivotally connected to the flame at a third pivot point at a position spaced from the first pivot point and to the housing at a fourth pivot point located at a position remote from the third pivot point and at a position spaced from the second pivot point. The pivot points are arranged so that the first and second arm are positioned in a non- parallel arrangement and traverse a pathway wherein the mean diduce between the combmer and housmg vanes during rotational movement of the combiner with respect to the housing.