Abstract: An optical guidance system for a spin-stabilized autorotative projectile ing a target radiation detector, a detector cooling means, a fixed-coil electromagnet and a tuned-frequency steering vane. During projectile flight the detector temperature is reduced for increasing the sensitivity of the detector to radiation. When target radiation is detected, a signal is generated that is representative of target deviation from the flight path of the projectile. This signal sets up a periodic oscillation in an electromagnet for generating an electromagnetic force which, periodically and in phase with the oscillation, projects a steering vane into the air stream, creating a lift on the projectile to steer it to a target.

Abstract: An optical scanning system having a rotatably driven, curved reflective sace with a predetermined pattern of reflective and non-reflective portions annularly arranged near the circumference of the surface. The emission source, such as an infrared source, is focused onto an area of the surface in the ring of the portions such that when the surface is rotated the portions are rotated under the image and as each reflective portion is brought into alignment with the image, the image is reflected to a detector. The orientation of the surface is continuously monitored for correlation with each detection. The sum of the orientations at detection per rotation defines placement of the source in the field of view of the system. Appropriate computer programs may be used to increase processing speed and, thereby, increase efficiency.

Abstract: A device for visually imaging invisible radiation, having a detector and ht emitting diode circuit interposed between two identical coded rotating discs, wherein the LED provides an output in response to the invisible radiation passed by the first disc and detected by the detector. That portion of LED output passed by the second disc is the output of the system, which output will visually appear as a gray field with a bright spot corresponding in position to the position of the radiation source in the field of view of the system. The appearance of the output results from the patterns of the disc which permits 50% transmissivity at any moment in time when an infrared source is present. The visual appearance resulting from at least one complete rotation of the disc is a field of 25% illumination with bright spots of 50% illumination therein corresponding to bright spots in the field of view.