Abstract: A magnetic proximity fuse for initiating a charge of a moving charge carrier. The proximity fuse includes at least one sensor for sensing a terrestrial magnetic field and producing a signal. At least one sensor senses movement of the charge carrier and produces a signal. A signal processor receives signals from the at least one magnetic field sensor and the at least one movement sensor and produces an output signal to initiate the charge of charge carrier only in response to changes in the terrestrial magnetic field caused by ferromagnetic objects other than the charge carrier or movement of the charge carrier, the output signal initiating the charge of the charge carrier.

Abstract: An optical system for determining the angular deviation of a movable object from a pre-selected target, wherein an objective lens projects an image of the target in a first focal plane and projects an image of the movable object in a further focal plane. A prism divides the images, with the target image being tramsmitted to an ocular and the movable object image being transmitted to a detector.

Abstract: Apparatus for controlling the output power of a laser diode the beam of which is directed in a selected direction toward a target so as to enable a missile or the like to be directed along the beam toward the target. The apparatus includes a circuit which supplies a variable amount of power to the diode, and a circuit which is responsive to the radiation emitted by the diode, and the latter circuit generates a signal which is proportional to the magnitude of the emitted radiation. A control circuit is provided which is initiated into operation at the time of firing of the missile and generates a signal which represents the desired increase in magnitude of the radiation emitted by the diode during the time of travel of the missile toward the target.