Abstract: A multiparameter light is disclosed, which incorporates an LED (light emitting diode) tracking ring surrounding a main output lens. The LED tracking ring is capable of additive color mixing and in turn can simulate the color of the main projected light projecting from the main output aperture or output lens of the multiparameter light.

Abstract: A new technique for re-computing shading parameters for low sidelobe levels for a radar or sonar system is disclosed. When some of the sensor elements become inoperative, remaining shading parameters are recomputed using a new constraint. This approach leads to an overall gain pattern that is superior compared to the one without re-computing the weights.

Abstract: A detachable cover for a window blind is disclosed. The detachable cover can be a sleeve which may be attached by a first attachment device such as velcro to a second attachment device of a vertical window blind which may also have velcro. The sleeve may have a top, bottom, and two sides and may have an opening at the top for sliding onto the blind and may be substantially closed at the bottom and two sides. The first attachment device on the sleeve may be a ring of material located near the top of the sleeve. The second attachment device may also be an elongated strip fixed to the vertical blind so that the elongated strip runs from about the top of the vertical blind to about the bottom of the vertical blind and lies substantially in the middle of the vertical blind.