Abstract: A system comprises a processing system, a laser system, a telescope system, a detector system and optical systems operatively arranged such that the laser system may be capable of outputting multiple wavelengths to a common telescope system, and the detector system is capable of receiving signatures from the same telescope system, under the control of a control system. The processor system processes signals received from the detector system to determine substances identified by known signatures. For example, a plurality of detectors in the detector system each receive a range of wavelengths of the signatures received by the telescope system. For example, a variable beam diverger and variable beam expander operatively control expansion and divergence of the output the laser system. For example, a beam reducer and lenslet array may operatively transmit signatures via optical fiber bundle to one or more of the detectors.

Abstract: A head mounted display device includes a structural frame arranged generally along a first axis and a second axis for viewing along a third axis, the first, second, and third axes being mutually perpendicular. The structural frame includes opposing upper and lower rims between which are defined left and right openings. Left and right micro-displays are coupled to the structural frame, and are configured to project visual content in a substantially forward direction along the third axis toward the left and right openings, respectively, and away from a user. Left and right optical elements are coupled to the structural frame and respectively positioned over the left and right openings and each include an at least partially reflective surface facing in a substantially rearward direction along the third axis. The structural frame maintains the optical elements in alignment to define an optical light path for reflectively guiding a light ray bundle from the micro-displays to a user's eyes.

Abstract: A head mounted display device includes a structural frame arranged generally along a first axis and a second axis for viewing along a third axis, the first, second, and third axes being mutually perpendicular. The structural frame includes opposing upper and lower rims between which are defined left and right openings. Left and right micro-displays are coupled to the structural frame, and are configured to project visual content in a substantially forward direction along the third axis toward the left and right openings, respectively, and away from a user. Left and right optical elements are coupled to the structural frame and respectively positioned over the left and right openings and each include an at least partially reflective surface facing in a substantially rearward direction along the third axis. The structural frame maintains the optical elements in alignment to define an optical light path for reflectively guiding a light ray bundle from the micro-displays to a user's eyes.

Abstract: A system comprises a processing system, a laser system, a telescope system, a detector system and optical systems operatively arranged such that the laser system may be capable of outputting multiple wavelengths to a common telescope system, and the detector system is capable of receiving signatures from the same telescope system, under the control of a control system. The processor system processes signals received from the detector system to determine substances identified by known signatures. For example, a plurality of detectors in the detector system each receive a range of wavelengths of the signatures received by the telescope system. For example, a variable beam diverger and variable beam expander operatively control expansion and divergence of the output the laser system. For example, a beam reducer and lenslet array may operatively transmit signatures via optical fiber bundle to one or more of the detectors.

Abstract: A spectroscopy system including first and second lasers. The first laser is triggered to induce a plasma, such as on a surface of a target at a stand-off distance from the target. The second laser stimulates amplified emissions from the plasma detected by one or more spectroscopes. The gain induced by the second laser detects traces of explosives and other substances on surfaces at stand-off distances. The spectroscopy systems use the same telescopic optics to collect emissions from the detection surface and activated at or just before the peak emission intensity useful for detecting element signatures and intensity ratios from the trace elements in the plasma.

Abstract: A spectroscopy system including first and second lasers. The first laser is triggered to induce a plasma, such as on a surface of a target at a stand-off distance from the target. The second laser stimulates amplified emissions from the plasma detected by one or more spectroscopes. The gain induced by the second laser detects traces of explosives and other substances on surfaces at stand-off distances. The spectroscopy systems use the same telescopic optics to collect emissions from the detection surface and activated at or just before the peak emission intensity useful for detecting element signatures and intensity ratios from the trace elements in the plasma.

Abstract: A vacuum concentrator uses microwave heating to enhance the rapid drying of a liquid specimen. Microwave heating without excessive arcing is made possible in a vacuum chamber by controlling the power of a microwave generator, by modifying antenna-like objects, and by interposing air in a direct path between opposing edges of microwave injection slots, while maintaining the vacuum condition in the vacuum chamber. This can be accomplished by using air filled plastic bosses passing through, and substantially filling the microwave injection slots. An alternate to the air filled bosses can be a non-metallic closure plate that excludes the microwave injection slots from the vacuum chamber, while allowing energy to be injected freely into the chamber. The microwave heating energy is absorbed by a vacuum chamber cover and dissipated to the atmosphere as heat.

Abstract: A high speed centrifugal concentrator includes a vacuum chamber within which a centrifuge rotor is rotatably mounted for spinning a plurality of vials containing biological solutions or the like at high speed while subjecting the solution to a vacuum condition for concentrating and evaporating the latter. The vacuum chamber has a hinged cover and is completely enclosed to maintain the vacuum condition therein and the centrifuge rotor is driven by an electric motor located outside of said closed vacuum chamber and remote therefrom. The electrical circuit for driving the motor includes dynamic braking means for braking the motor in response to manual operation of a selector switch, or to the raising of the vacuum chamber cover from closed position.