Abstract: A supply is disclosed that develops a high dc voltage that may be applied to the anode of a cathode ray tube (CRT) of a display system. The supply provides the high dc voltage without the need for any high voltage flyback transformers and without the need of any power transistors. In one embodiment, the circuit of the invention is interposed between a subsystem of a power source of a horizontal deflection system, and the anode of the CRT.

Abstract: A universal focal plane DEWAR assembly for cryogenic cooling of an infrared detector DEWAR, which includes an infrared transmissive window attached to a hollow support cylinder under vacuum conditions, with a glass bore in the cylinder, which contains focal plane infrared structure inside of a cold shield, which is attached to a cold plate, with a cold button in contact therewith, and with a cold finger from a cryogenically cooled expander, which is spring mounted in the glass bore for removal and replacement without disturbing the focal plane structure.

Abstract: A point source spatial filter determines the quality of a central point source or pixel under test to thereby detect point sources and minimize the signals from all sources other than the desired point source. The spatial filter incorporates a buffer apparatus for receiving pixel signals, memory apparatus for storing pixel data for the test pixel and surrounding pixels, comparator apparatus for comparing test pixel values against a given number of surrounding pixel values to determine if the test pixel is a local maximum or minimum value, subtraction apparatus for subtracting the value of the nearest-valued surrounding pixel from the test pixel value when the test pixel is determined to be a local maximum or minimum, and apparatus for indicating the difference between the value of the test pixel and that of the surrounding pixel of closest value.

Abstract: A video processor that provides non-linear amplification of an input video signal by automatically modulating a non-linear transfer function of an amplifier having a plurality of piece-wise, analog-to-digital (A/D) converter sections. Each A/D converter has both high and low reference levels set at the input break points of the non-linear transfer function to assign an equal number of shades or levels of gray thereto. The high and low reference levels are connected in a "totem pole" configuration with the high reference level of the first converter providing the low reference level to the second converter, and so on for the remaining converters.