Abstract: A multispectral illuminator includes an array of tapered non-imaging collection optics, a plurality of arrays of LED die and a lens system. Each tapered non-imaging collection optic has an input face and an output face. Each LED die has an optical spectrum and is disposed proximate to one of the input faces. The lens system is configured to receive light emitted from the output faces and to generate a composite image at an illumination plane. The composite image includes a superposition of the images of each output face. A control module controls the intensities of the LED die and may be programmed to provide a predetermined optical spectrum for the composite image. In some embodiments, the tapered non-imaging collection optics are configured to compensate for keystone effect and intensity gradient in the images of the output faces.

Abstract: An articulated boom comprises a support arm with a plurality of hingedly-connected joints. The arm is adapted and arranged to carry an antenna reflector so that in use, the reflector can move between a first stowed position in which the reflector is in folded condition and a second deployed position in which the reflector is in deployed condition. A spacecraft incorporates into one or more of its sides a plurality of such articulated booms. The support arms of the booms can be advantageously positioned at the circumference of the associated reflectors when in a stowed position, so as to allow the reflectors to be neatly stacked together within a space defined by the launch vehicle fairing.