Abstract: A display device having a set protecting function upon generation of an abnormal voltage includes a horizontal deflection circuit for providing a horizontal signal to a deflection yoke connector, a high voltage output circuit for supplying a high voltage to an anode in accordance with an oscillating signal applied from the horizontal deflection circuit, a power supply circuit for supplying power to the horizontal deflection circuit, and an abnormal voltage detector disposed between the deflection yoke connector, and the high voltage output circuit and the power supply circuit, for detecting whether the deflection yoke connector is connected and whether a part of the high voltage output circuit is damaged, to thereby control a power output of the power supply circuit in accordance with a detected result.

Abstract: The piezoelectric effect of an optical sensor (6) made from quartz is a function of temperature. Without correcting or compensating measures, this temperature dependence leads to a falsification of the measuring signal if the temperature of the sensor element is not held constant. In order to obtain accurate measurements for variable sensor temperatures T.sub.s, a temperature-corrected measuring signal M is provided in accordance with:M=U13.multidot.(1+.alpha..multidot.(T.sub.0 -T.sub.s)),U13 signifying a control signal, T.sub.0 a prescribable calibration temperature of the sensor (6), and .alpha. the temperature coefficient of the sensor (6). In this case, the sensor temperature (T.sub.s) is calculated in accordance with:T.sub.s =f(K,E(U.sub.Tr)),K being a contrast parameter which is calculated from light power signals (U1, U2), is a function of the sensor temperature (T.sub.s) and is proportional to the interference contrast, and U.sub.Tr signifying a signal receiver temperature signal and T.sub.

Abstract: In a vertical sawtooth generator of a vertical deflection circuit, a first comparator generates an output signal when a retrace portion of a sawtooth signal is at a first magnitude to initiate a vertical trace portion of the sawtooth signal. An amplifier responsive to the sawtooth signal and to a reference signal generates a feedback current at a time that occurs between the center of vertical trace and the end of trace and away from the center of trace. The feedback current is determined in accordance with a difference between the sawtooth signal and the reference signal. The feedback current is coupled to a first capacitor to develop a gain control voltage. The control voltage is applied via a voltage-to-current converter to an integrating capacitor to develop in the integrating capacitor the trace portion of the sawtooth signal. The control voltage is initialized during a power start-up interval.

Abstract: A light emitting photonic structure has a transparent substrate, such as sapphire, supporting a layer of group IV semiconductor material, such as silicon, having at least one porous region from which light is emitted as a response to a stimulus. An example of such a photonic structure is described in U.S. patent application Ser. No. 08/118,900. The photonic structure can be used to assess the presence of various fluids. The photonic structure is disposed to be contacted by the fluid to be sensed should it be present. The light emitting region of the photonic structure is stimulated by an appropriate source, and the light emitted by the photonic source is detected by a detector. The light emitting region of the photonic structure will emit a certain luminescence in air and should the light emitting region be contacted by other fluid or fluids, this luminescence can be affected and the corresponding change in luminescence can be detected thus the presence of these fluids can be sensed.

Abstract: A multi-lenses optical device with high resolution is provided for converting an optical image into electronic signals. The multi-lenses optical device includes a focusing unit for focusing a plurality of sections of the optical image to correspondingly generate a plurality of focused image sections with the same ratio and having the same optical path length, a photoelectric conversion unit for converting the plurality of focused image sections into the electronic signals, a switching unit for sequentially having each one of the focused image sections or the optical image sections selected and having the selected image section transmitted to the photoelectric conversion unit, and a light-reflecting unit mounted between the photoelectric conversion unit and the focusing units for transmitting the plurality of image sections.

Abstract: A voltage control circuit to control a focus exactly by controlling a front/back porch voltage level of a vertical focus control signal regardless of a slight error in an upper and a lower part of a cathode-ray tube. In order to control the front/back porch level of the vertical focus control signal, a certain level of a DC voltage put out by a level controller is added to a saw tooth wave generated by integrating a DC voltage put out by a microcomputer in a first integrator. In a second integrator, a parabola wave is generated by secondly integrating the DC voltage. The level of the DC voltage added to the saw tooth wave is controlled by putting out the generated parabola wave as the vertical focus control signal according to a slight error generated in the upper and the lower part of a cathode-ray tube, and this enables to control the front/back porch voltage level of the vertical focus control signal and the focus exactly in the upper and the lower part of the screen.

Abstract: An infrared remote sensing device and system for determining or allowing an inspector to determine whether a motor vehicle warrants an enhanced safety inspection to detect a defective or faulty brake system.

Abstract: The present invention relates generally to ion beam handling in mass spectrometers, and more specifically to a method and apparatus for focusing ions in time-of-flight mass spectrometers (TOFMS). This invention focuses ions using one or more electrodes bound on at least one side by an electrically conducting grid. Electric fields generated by the electrodes focus the ions. With electric fields of the proper strength and geometry, ions may be focused onto a point some desired distance from the source. According to the preferred embodiment of the present invention, a shielded lens, in the form of an electrically conducting cylinder and two conducting grids, is used to produce and adjust the position of an ion focal point.

Abstract: An optical pickup system reads an information signal stored on a recording surface of an optical disk. The optical pickup system comprises a light source for generating a light beam including a P and an S polarization component with a wavelength .lambda..sub.1, a 1/4.lambda.

Abstract: A method and apparatus for reading a latent image stored in a photo-stimulated luminescence imaging plate by scanning the imaging plate with a focussed beam of light of a first wavelength to stimulate the stored image to emit light of a second wavelength; collecting the light emitted by the imaging plate; and directing the collected light to a light detector which converts the collected light to electrical signals. The light emitted by the imaging plate is collected by a non-imaging optical system which includes a dichroic mirror selectively directing light of the second wavelength to the light detector and light of the first wavelength away from the light detector.

Abstract: A scanning electron microscope is provided. The scanning electron microscope can efficiently detect secondary electrons from a sample and reflected electrons irrespective of magnitudes of an acceleration voltage and a deceleration voltage using the retarding method. The scanning electron microscope comprises a sample holder 17; an electron beam source 1 for emitting an electron beam 19; scanning means 26, 27 for scanning the electron beam on the sample; an objective lens 3; a deceleration electric field generating means 20 for generating a deceleration electric field to decelerate the electron beam in the space above the sample 9; and detectors 150, 151 for detecting a secondary signal composed of at least one of secondary electrons 16 and reflected electrons 15 generated from the sample 9 by irradiation of the electron beam.

Abstract: A semiconductor detector for infrared radiation is manufactured by the steps of depositing an auxiliary layer on a main surface of a carrier, depositing a membrane layer provided with at least one opening onto the auxiliary layer, selectively etching the auxiliary layer through the at least one opening of the membrane layer, so that a hollow space arises in the auxiliary layer, sealing the hollow space by depositing a covering on th membrane layer, and fashioning a detector element on the covering by depositing a material sensitive to infrared radiation within a region of the covering that is bounded by the hollow space therebelow.

Abstract: The present invention relates to a multi-frequency display system and method for providing color convergence. The system comprises a convergence circuit that is configured to receive a first set and a second set of color input signals. The first of color input signals operates at a first frequency, and the second set of color input signals operates at a second frequency. The system also comprises a controller circuit coupled to the convergence circuit, that is configured to generate a first convergence signal corresponding to the first frequency and a second convergence signal corresponding to the second frequency. The convergence circuit generates a first control signal in response to the first set of color input signals and the first convergence signal. The convergence circuit generates a second control signal based on the second set of color input signals and the second convergence signal.

Abstract: A high-frequency horizontal deflection/high-voltage generation apparatus capable of setting inductance of a deflecting yoke without being affected by a collector voltage of a horizontal switching transistor and suppressing power loss while increasing a deflecting pulse voltage so that amplitude adjustment and side-pin correction can be effectuated without incurring any appreciable power loss. A voltage which is higher than the collector voltage V.sub.CP of the switching transistor is applied to the deflecting yoke. A resonant circuit is provided for applying to the deflecting yoke a voltage pulse of positive polarity and that of negative polarity, i.e., the voltage pulses bearing opposite phase relation to each other, for increasing equivalently the voltage applied across the deflecting yoke. The switching waveform outputted from the resonant circuit is synchronized with a switching operation of a high-speed switching element driven by a voltage induced in a winding of the deflecting transformer.

Abstract: A time-domain signal processing system for displaying, classifying, and recognizing temporal and spectral features in terahertz waveforms returned form materials. Specifically, novel techniques are described for classifying and analyzing the free induction decay exhibited by gases excited by far-infrared (terahertz) pulses. Illustratively, a simple geometric picture may be used for the classification of the waveforms measured for unknown gas species and gas mixtures.

Abstract: A tracking error detector employing a phase difference detection method, comprising a photo detector for generating four divided signals, a first adder for adding two of the four divided signals from the photo detector, a second adder for adding the remaining two signals from the photo detector, first and second comparators for comparing output voltages from the first and second adders with a reference voltage, respectively, a first D flip-flop for providing first and second output signals synchronously with first and second output signals from the first comparator, a first OR gate for ORing the first and second output signals from the first D flip-flop, a second D flip-flop for providing first and second output signals synchronously with first and second output signals from the second comparator, a second OR gate for ORing the first and second output signals from the second D flip-flop, a third OR gate for ORing output signals from the first and second OR gates, a buffer for transferring the output signal fr

Abstract: A scanning probe microscope uses a high refractive index solid immersion lens (SIL) probe to provide optical images with a resolution better than the diffraction limit in air. The SIL probe has a spherical upper surface and a conical (or pyramidal) lower surface with a sharp tip. The SIL reduces the focused spot size because the spherical surface increases the angle of the marginal rays and the high refractive index material shortens the wavelength. The focused spot generates an evanescent wave having an amplitude that decays exponentially with distance from the SIL. The sharp tip on the lower surface reduces the tip-sample contact area and the tip-sample separation so that sample is within the near-field of the SIL probe. The sample perturbs the evanescent wave and a photodetector monitors characteristics of the light. A cantilever carries the SIL probe and a cantilever deflection sensor permits precise control of tip-sample forces and separation.

Abstract: The invention is an electro-optic voltage sensor head designed for integration with existing types of high voltage transmission and distribution apparatus. The sensor head contains a transducer, which comprises a transducing material in which the Pockels electro-optic effect is observed. In the practice of the invention at least one beam of electromagnetic radiation is routed into the transducing material of the transducer in the sensor head. The beam undergoes an electro-optic effect in the sensor head when the transducing material is subjected to an E-field. The electro-optic effect is observed as a differential phase a shift, also called differential phase modulation, of the beam components in orthogonal planes of the electromagnetic radiation. In the preferred embodiment the beam is routed through the transducer along an initial axis and then reflected by a retro-reflector back substantially parallel to the initial axis, making a double pass through the transducer for increased measurement sensitivity.

Abstract: A contamination sensor is provided for use in a fluid system and machinery to continuously monitor the level of contaminants in a fluid. The contamination sensor includes a source of light that is directed into the fluid stream with three photodetector arrangements detecting light scattered by contaminants contained in the fluid. The first photodetector arrangement is located near the origin of the source of light. The second photodetector arrangement is located farther away from the source of light. The third photodetector arrangement is located perpendicular to the axis of the light beam and spaced from the source of light along the axis of the light beam. The simultaneous detected scattered light from a contaminant in the fluid is converted to electrical signals by the photodetectors, conditioned by a signal conditioning circuit and transferred to a signal processing unit for interpretation.

Abstract: A high contrast imaging system (10) having an adaptive focal plane (52). The system (10) includes receiver optics (32) that receive radiation (30) from both a detected target (16) and a laser beam (14) incident thereon, and a polarizing beam splitter (44) that splits the radiation into a first beam of reflected laser radiation and a second beam of radiation (46). The polarizing beam splitter (44) linearly polarizes the second beam of detected target radiation (46). A beam polarizer (48) circularly polarizes the second beam of detected target radiation (46). An adaptive focal plane or micromirror array (52) reflects the circularly polarized detected target radiation back through the beam polarizer (48) to linearly polarize the reflected, second beam of radiation (46). A detector array (56) detects the reflected, second beam of radiation (62) and outputs a signal to tracker electronics (22) in accordance with the intensity of radiation.