A side scan sonar system which records return echoes in a manner which realistically displays the spatial relationship between the sonar transducer and the echo producing topographical feature on the sea floor. The system includes a dual channel strip chart recorder having a continuous transverse belt carrying a pair of equally spaced writing styli. The belt circulates at a constant speed with each stylus moving across the paper, first in one direction and then in the opposite direction. One of ...

A scan converter has a storage type target electrode in which information may be stored by means of a writing beam for subsequent retrieval by means of a reading beam. The electron output of a channel multiplier plate, positioned on the writing gun side of the target electrode, is proximity focused upon that target. The operating potentials of the writing system are selected to establish high electron velocity of the writing beam through the field of the writing beam deflectors to minimize trans...

An electronically steerable antenna array comprising phased element antennas has essentially uniform gain for small scan angles. An idealized shape of element pattern in the array environment is closely approached by controlling the complex mutual coupling among the element antennas for pattern shaping. The resulting element-in-array pattern has a nearly flat top, steep sides, and also has low sidelobes in the angular regions where grating lobes of the array factor can appear upon steering. Cons...

There is disclosed herein a conical scan tracking system to track an energy source wherein the speed of nutation is controlled in a pseudorandom manner rather than in a constant manner as in the prior art to eliminate false antenna pointing errors caused by incidental or deliberate amplitude modulation at the constant nutation or scan frequency of the energy received from the source being tracked.

A radar antenna scan drive employs a planetary type drive. An RF antenna is fixed to rotate with a planet gear while the planet rotates around a sun gear. The swept volume of the RF antenna, as it scans, is shaped to be noncircular by the ratios selected for the planetary drive. The swept volume shape is utilized to package a larger RF aperture antenna in a fixed available space that is not circular.

A hybrid antenna system comprises two or more wave guide antenna sections which are physically separated and separately fed with radiant energy from a single source by dividing up energy from the source and feeding it into first ends of the various sections. Phase shifters are provided such that the radiant energy fed to successive sections is shifted in phase in such a manner that the overall radiated output beam from all of these sections constitutes a single beam which may be scanned in the s...

A broadside array antenna arrangement capable of scanning electronically in one or two planes, wherein the transmitted or received frequency remains fixed although beam steering is effected by progressive phase shifts introduced to the various array elements as provided by the expedient of frequency variations. A prime oscillator frequency f.sub.o is mixed with a variable steering oscillator frequency f.sub.s to produce sum and difference frequencies f.sub.o + f.sub.s and f.sub.o - f.sub.s. The ...

An illuminating apparatus in which the temperature thereof is regulated for producing light rays having a substantially constant spectral energy distribution.

Optical apparatus for scanning a field of view in a raster pattern including a motor-driven spinning mirror structure having a plurality of substantially optically flat mirrors positioned substantially uniformly about the axis of spin of the structure with the surfaces of the mirrors normal to a radial direction from the axis of spin; an oscillating, substantially planar, mirror positioned to intercept reflected light from a portion of the aforementioned spinning mirror structure, said oscillati...

There is disclosed herein two induction scan hardening and tempering lines wherein pipe is moved axially one way through an induction coil and quench for hardening and in the opposite direction through the coil for tempering, as phases of predetermined cycles. A single supply conveyor sequentially conveys new pipes to a position adjacent to the hardening lines, and transfer means alternately deposit a pipe first on one hardening line and then the other. Automatic control means control the cycles...