Abstract: An infrared detector assembly comprising a substrate of suitable material such as sapphire, an infrared detector array attached to the substrate, a cold shield attached to the detector array, and an optical microphonics filter attached to the cold shield is disclosed. The optical microphonics filter includes a substrate of material having its major surfaces coated with layers of thin film coatings for passing a preselected frequency band, and a metalization for reflecting spurious energy impinging thereon thereby shielding the filter's substrate and coatings therefrom.

Abstract: The invention comprises the closer positioning of a conventional telescopic ens, i.e., afocal lens, to a conventional optical scanner in such a combination as to minimize the required scanner mirror size and weight thereby improving scan efficiency, while also reducing physical size and thus the power requirement for driving the scanner mirror. The exit pupil of the telescopic lens is moved to a position close to the center of scanner wheel so that the incoming ray bundle follows the facets of the scanner mirror as it moves through a detector means field-of-view.

Abstract: A thermoelectric voltage generator utilizing heat from a vehicle exhaust to rovide a differential temperature through a plurality of thermoelectric elements comprised of serially connected alternate N- and P-type semiconductors having alternate electrical contacts between adjacent elements at a hot side and at a cold side to produce electrical energy in accordance with the Seebeck effect and in which the electrical energy is applied to an external device by way of connections at opposite ends of said plurality of thermoelectric elements.

Abstract: A split cycle cooler having two free moving in-line regenerator-displacers, ne within the other in which the one functions to produce a precooled volume for the other, wherein both are controlled by two pneumatic pistons operating against two pneumatic spring volumes. The device provides refrigeration of small heat loads to cryogenic temperatures.

Abstract: A Stirling-cycle refrigerator including a compressor portion having two cnders with respective pistons therein, and an expansion portion with a cylinder having first and second distinct spaces, and with opposite ends of an expansion piston in the distinct spaces. The two cylinders of the compressor portion are connected by respective refrigerant conduits to the two spaces of the expansion portion. The end of the expansion piston in the first space has a regenerator therein. The two pistons of the compressor are driven 180.degree. out of phase, whereby the respective conduits simultaneously induce compression in the first expansion portion space and expansion in the second. The conduit between the second space and the respective compressor cylinder additionally includes a regenerator.

Abstract: An apparatus that uses waste heat from an internal combustion engine to de a heat engine which provides a mechanical output therefrom to drive automotive accessories. A Stirling engine is used as the heat engine.

Abstract: A system that samples and uses heat from a hot exhaust as a source of heat o the hot side of a Vuilleumier compressor is driven by some external rotational input means to overcome the friction of a regenerator matrix containing hot displacer and cause reciprocal movement of the hot displacer. The Vuilleumier compressor produces alternating pressure waves that are applied to a cold finger array of free-displacer refrigerators wherein air is passed over the cold ends of each of the cold fingers to cool or refrigerate some desired area and heat is removed from the hot ends of the cold fingers and exhausted in another direction.