Abstract: A system is disclosed for keeping rats and similar pests away without trapping or killing them. It provides a long-life battery powered LED light system for deterring rats, mice and other nocturnal animals. Embodiments of the present invention are designed to operate continuously for at least one year between battery changes. Embodiments have been proven to deter rats from invading engine compartments of parked motor vehicles, vegetable gardens, attics, garages and outdoor patios. In preferred embodiments the wavelengths of the LEDs are chosen to correspond to the known wavelength sensitivity peaks of the eyes of rats, mice, and other rodents. This new technology transcends traps.

Abstract: A system is disclosed for keeping rats and similar pests away without trapping or killing them. It provides a long-life battery powered LED light system for deterring rats, mice and other nocturnal animals. Embodiments of the present invention are designed to operate continuously for at least one year between battery changes. Embodiments have been proven to deter rats from invading engine compartments of parked motor vehicles, vegetable gardens, attics, garages and outdoor patios. In preferred embodiments the wavelengths of the LEDs are chosen to correspond to the known wavelength sensitivity peaks of the eyes of rats, mice, and other rodents. This new technology transcends traps.

Abstract: Jewelry, such as finger rings and earrings, which flash in synchronism with the wearer's heartbeat. A pulsed IR signal is directed into the wearer's tissue and a reflected or transmitted signal is monitored to determine when the wearer's heart beats at which time one or more light emitting sources in the jewelry flashes. The monitored signal is utilized to determine the wearer's heart rate. At least two light emitting sources are provided one of which flashes with each heart beat and the other flashes when the heart rate reaches or exceeds a predetermined range or increases faster than a predetermined rate. Preferred embodiments include three visible LED's (red, green and blue) and a micro-processor which calculates pulse rate and causes the red LED to blink on each pulse, the green LED to blink on each pulse when the wearer's pulse rate is greater a first threshold and the blue LED to blink on each pulse when the wearer's pulse rate is greater than a second threshold corresponding to extreme excitement.

Abstract: Apparatus for use with a standard television (TV) receiver for superimposing information or images over portions of the broadcast scene. Synchronization signals are generated by locking onto the horizontal sweep electromagnetic interference (EMI) generated by all television receivers. A wideband noise (RF) burst is generated and coupled to the antenna input leads of the television receiver. The picture content of the TV scene at the time of the noise burst is disrupted and various effects are created by controlling the level of the noise bursts. By controlling the position of the RF noise, an image may be created and superimposed over any part(s) of the scene. The scene may be derived from any source, such as standard television broadcast, a video cassette recorder (VCR), electronic game or computer monitor. No modification of the television receiver is required, and no change to the apparatus is needed when the TV is tuned from one broadcast channel to another.

Abstract: Apparatus for use with a standard television (TV) receiver for superimposing information or images over portions of the broadcast scene. Scynchronization signals are generated by locking onto the horizontal sweep electromagnetic interference (EMI) generated by all television receivers. A wideband noise (RF) burst is generated and coupled to the antenna input leads of the television receiver. The picture content of the TV scene at the time of the noise burst is disrupted and various effects are created by controlling the level of the noise bursts. By controlling the position of the RF noise, an image may be created and superimposed over any part(s) of the scene. The scene may be derived from any source, such as standard television broadcast, a video cassette recorder (VCR), electronic game or computer monitor. No modification of the television receiver is required, and no change to the apparatus is needed when the TV is tuned from one broadcast channel to another.

Abstract: A time division multiplexing, fiber optic data gathering system, including two or more sensors formed on an optical fiber, and a phase sensitive detector. Each sensor includes two reflectors separated by a section of the fiber having length L. Each reflector may be activated so that when an interrogating light signal propagates in a first direction past the activated reflector, a portion of the interrogating light signal will be reflected back into a direction opposite the first direction. Each reflector may also be deactivated so that the interrogating signal may propagate unhindered past the deactivated reflector. Variations in the optical path length between the reflectors of a sensor, due to changes in an external parameter of interest, will cause phase modulations that are extracted in the phase sensitive detector by homodyne or heterodyne techniques.

Abstract: A data gathering system comprising a single optical fiber having one or more modulators formed thereon, means for launching into the fiber an interrogating light pulse which propagates in a first direction, means for generating at each modulator an optical return signal which propagates in the fiber in a second direction opposite the first direction and which has an intensity which is variable in response to variations in an external signal incident at the modulator, and means for detecting and processing each such return signal. The return signal comprises a portion of the interrogating light pulse which is coupled into the fiber in the second direction via evanescent coupling. The return signal from each modulator (or array of modulators) is identified via time division multiplexing. A signal processing means may be coupled to the fiber for generating a unique return signal from each of one or more modulator arrays, each array comprising a selected subset of the modulators.

Abstract: A level sensor for measurement of the level of molten metal in an electron beam evaporator which operates to sense directly the position of the point or line source of evaporant by detection of radiation such as light emitted therefrom. Compensation is provided for variations in electron beam deflecting magnetic field to avoid interpreting lateral movement of the point or line source from field variations as level changes. Compensation is also provided in the detection circuit for variations in detected light intensity that would otherwise provide an erroneous indication of level change. Detection of further conditions that produce unreliable level sensing and system inhibition in response thereto is provided as a safety feature.

Abstract: A system of wholly passive or static elements for increasing laser pulse rate by interleaving the pulses of a plurality of beams of pulsed laser radiation. The system of static elements includes an array of beam splitters which are operative to receive a plurality of beams of pulsed laser radiation and provide a plurality of output beams, each sharing the radiation in each of the input beams. The invention includes a methodology for expanding the array of beam splitter elements to combine any number of input beams, of whatever differing characteristics, to provide a corresponding number of output beams, each sharing a portion of the radiation in each of the input beams.

Abstract: In an injection-locked laser system, a timing system for assuring the locking of an injection-locked oscillator to the frequency of a master oscillator. The system automatically controls the firing of the injection-locked oscillator in accordance with the difference in time between the production of a master oscillator pulse and the time that a predetermined population inversion level has been reached in the injection-locked oscillator as measured by a predetermined level of fluorescence produced by the injection-locked oscillator.

Abstract: A system for multiplexing or demultiplexing pulsed laser radiation having an acousto-optical device which is electrically controlled to switch a common path of high pulse rate laser radiation between a plurality of spatially distinct paths for relatively lower pulse rate laser radiation at which the pulses are sequenced according to a predetermined time pattern. The acousto-optical element typically includes a Bragg cell which is electrically driven by a set of distinct frequencies, causing deflection of radiation passing therethrough at a predetermined set of angles whereby pulsed radiation on a single path may be distributed onto the plural separate paths or radiation on plural separate paths of time-sequenced pulses of radiation can be combined into a single path of augmented pulse rate.

Abstract: A system of wholly passive or static elements for increasing laser pulse rate by interleaving the pulses of a plurality of beams of pulsed laser radiation. The system of static elements includes an array of beam splitters which are operative to receive a plurality of beams of pulsed laser radiation and provide a plurality of output beams, each sharing the radiation in each of the input beams. The invention includes a methodology for expanding the array of beam splitter elements to combine any number of input beams, of whatever differing characteristics, to provide a corresponding number of output beams, each sharing a portion of the radiation in each of the input beams.