Abstract: A hand-held light measuring device includes a device housing (G) with a bottom face incorporating a measuring window (7) through which a measurement optical path extends so that a measurement object can be measured when the device housing (G) is positioned with its bottom face on the measurement object. The measuring device has an integrated, displaceably mounted white reference tile, which can be moved into the measurement optical path and moved back out of it again. The white reference tile is disposed in an end region of an oblong support plate (10) on its side directed towards the housing interior.

Abstract: A system and method for performing lethality assessment utilizes frequency domain reflectometry (FDR) to determine impact point and damage propagation faults in a detection surface. The detection surface has a conductive layer capable of propagating radio frequency (RF) signals. At least one signal transmit/receive port on the detection surface injects a radio frequency (RF) interrogation signal into the detection surface and at least two signal receive-only ports on the detection surface spaced a distance apart from each other and from the signal transmit/receive port receive reflected radio frequency (RF) signals of the interrogation signal. A frequency domain reflectometry measurement system coupled with the transmit/receive port and signal receive-only ports measures frequency responses of the ports compared to predetermined baseline measurements and determines the precise location of an impact point and damage propagation fault in the detection surface by triangulation.

Abstract: An optical measuring head for a duct gas monitoring system is provided, the measuring head being mounted to an outer wall of a gas duct through which the duct gas flows. The measuring head has a longitudinal chamber which at one end opens into the gas duct and at the other end contains an active optical component. The chamber is flushed with a purge gas which, after flushing the chamber, is discharged into the gas duct. A gas line is installed between the chamber and interior of the gas duct at a point upstream of a discharge point and the purge gas is a branch-off of the duct gas.

Abstract: An spectrometer including Raman and LIBS spectroscopy capabilities is disclosed. The spectrometer includes a laser source configurable to produce a lased light directable towards a target substance, the laser source having a single wavelength and having sufficient power to cause a portion of the target to emit Raman scattering and sufficient to ablate a portion of the target substance to produce a plasma plume. A separate remote light collector is optically configurable to collect light emitted from the portion of the target emitting Raman scattering and from the portion of the target producing the plasma plume. A filter is optically coupled to the remote light collector to remove reflected light and Rayleigh-scattered light, and a spectroscope is optically coupled to the filter and configured to separate the collected and filtered light into a frequency spectrum comprising a Raman spectrum and a laser-induced breakdown spectrum. Finally, an electronic light sensor is used to record the frequency spectrum.

Abstract: An optical path monitoring device according to the present invention includes: a measurement unit which irradiates optical pulses to an optical path as a monitoring target to cause back scattered lights, the measurement unit generating measurement data based on the back scattered lights; and a processing unit which controls operation of the measurement unit, the processing unit acquiring the measurement data from the measurement unit, the processing unit performing an arithmetic processing of the measurement data to identify an abnormal point of the optical path, and after acquiring the measurement data the processing unit sending the measurement unit instructions to start the next measurement.

Abstract: A pattern inspection method and apparatus in which a deep ultraviolet light or an ultraviolet light is irradiated onto a specimen on which a pattern is formed, an image of the specimen which is irradiated with the deep ultraviolet light or the ultraviolet light is formed and the formed image is detected with a rear-surface irradiation type image sensor, which is sensitive to wavelengths of no greater than 400 nmm. A signal outputted from the image sensor is processed so as to detect a defect of the specimen by converting an analog image signal outputted from the image sensor to a digital image signal with an A/D converter, and a display displays information of the defect detected.

Abstract: An optical mask positioned on a scintillator array. The optical mask includes a reflective layer. One or more windows can be positioned on the surface of optical mask.

Abstract: A method of optically imaging an object includes the determination of a source point and a destination point within the object. Planar boundaries are selected that approximate a geometrical shape of the object, and virtual sources are found using a reflection of the original source through the boundaries. Subsequent reflections of the added sources may be used to find higher order sources. Contributions to an optical transfer function from each of the added sources are added to determine a cumulative optical transfer function until a convergence limit is reached. The resulting optical transfer function is more accurate than the original in that it takes boundary phenomena into consideration.

Abstract: A portable imaging-based measurement device is developed to perform 2D projection based measurements on an object that is difficult or dangerous to access. This device is equipped with self calibration capability and built-in operating procedures to ensure proper imaging based measurement.

Abstract: A method includes a first step of joining a multimode fiber to a first end of an optical fiber being a specimen, allowing light to propagate from the multimode fiber to the specimen, measuring an intensity of light from a second end of the specimen, and determining a first power spectrum; a second step of joining the multimode fiber to a first end of a reference fiber having bending loss higher than that of the specimen, allowing light to propagate from the multimode fiber to the reference fiber, measuring an intensity of light from a second end of the reference fiber, and determining a second power spectrum; a third step of determining a difference spectrum by subtracting the second power spectrum from the first power spectrum; and a fourth step of determining a higher-order mode cutoff wavelength of the specimen on the basis of a shape of the difference spectrum.

Abstract: A high resolution optical fiber length meter, live fiber detector, and reflectance tester (instrument) for single mode applications using a low power, long wavelength laser for generating wide and narrow optical pulses that are launched into a single mode fiber under test. The laser output fiber pigtail is fusion spliced to a singlemode coupler whose output is coupled to the instrument bulkhead connector. A PIN photodiode is fusion spliced to the singlemode coupler to receive the reflected light from the fiber under test. The high resolution hand-held instrument is useful in examining singlemode passive optical networks (PON).

Abstract: A rapid visual fiber optic cable tester for visually inspecting optical continuity and attenuation of multiple strand fiber optic cable connectors through an existing fiber optic adapter panel, comprising: an enclosure having a uniform visual light source in a visible spectrum wavelength range to provide a uniform visual light pattern on a transparent screen; an electrical power source for powering the uniform visual light source; a power button for controlling the electrical power source; whereby the rapid visual fiber optic cable tester is positioned toward the existing fiber optic adapter panel at one end of the multiple strand fiber optic cable without a direct contact with the connectors; while observing visually at the other end of the cable through existing fiber optic adapter panel for any difference in light intensity between each fiber optic strand; therefore visually detecting optical continuity and attenuation by light intensity levels instantly and rapidly.

Abstract: A fiber instrument for measuring properties of a fiber sample, the fiber instrument having a surface for receiving the fiber sample, a hand for pressing the fiber sample against the surface, an illumination source for selectively illuminating the fiber sample with more than one peak wavelength, where each of the peak wavelengths is independently controllable as to an applied intensity of the peak wavelength, a sensor for capturing images of the fiber sample while it is illuminated, and a controller for controlling at least the sensor and the illumination source. By providing multiple peak wavelengths of illumination that are each independently controllable as to illumination intensity, the fiber instrument as described herein is better able to detect both foreign material within the fiber sample, and color gradations of the fiber sample.

Abstract: The present invention describes a method for measuring the concentrations of species present at one point of a separation unit functioning in simulated moving bed mode (SMB), using an immersing probe located at one point in the unit or on one of the streams entering or leaving said unit, and a thermocouple located in the vicinity of the immersing probe, in which a Raman spectrum obtained using a laser source functioning at a wavelength of 785 nm is utilized.

Abstract: A measurement apparatus for measuring an optical fiber transmission line used to connect to an opposite apparatus, the measurement apparatus includes a transmission part for generating a measurement packet used for measuring a length of a first and second optical fiber transmission line, and transmitting the measurement packet to the opposite apparatus through the first optical fiber transmission line, a reception part for detecting the measurement packet returned from the opposite apparatus that perform a loopback processing of the measurement packet through the second optical fiber transmission line, a calculation part for calculating a packet transmission time which is a processing time required from the generation of the measurement packet to the detection of the measurement packet, and a measurement part for performing a measurement control of the length of the first and second optical fiber transmission line based on the packet transmission time calculated by the calculation part.

Abstract: An optical element positioning apparatus of the present invention includes a moving unit including an optical element 2, a drive mechanism 100 configured to drive the moving unit, a position measuring sensor 130 configured to measure a position of the optical element 2, and an optical element controller 10 configured to control the drive mechanism 100 based on a measurement result by the position measuring sensor 130. An incident position (p point) at which a principal ray of a central field enters the optical element 2 is displaced from an optical axis of an optical system including the optical element 2, and the position measuring sensor 130 measures the incident position in an optical axis direction.

Abstract: The present invention relates to ellipsometer and polarimeter systems, and more particularly is an ellipsometer or polarimeter or the like system which operates in a frequency range between 300 GHz or lower and extending to higher than at least 1 Tera-hertz (THz), and preferably through the Infra-red (IR) range up to, and higher than 100 THz, including: a source such as a backward wave oscillator; a Smith-Purcell cell; a free electron laser, or an FTIR source and a solid state device; and a detector such as a Golay cell; a bolometer or a solid state detector; and preferably including at least one odd-bounce polarization state image rotating system, and optionally including a polarizer, at least one compensator and/or modulator, in addition to an analyzer.

Abstract: An optical system includes a light sending section that sends light to an object having a scattering medium and a lower medium positioned below the scattering medium, where the scattering medium scatters light and the lower medium feeds back polarized light in response to light incident thereon, a light receiving section that receives (i) light that is sent from the light sending section and then scattered by the scattering medium and (ii) light from the lower medium, and a thickness calculating section that calculates a thickness of the scattering medium, by referring to at least one of a non-polarization component and a polarization component of the light received by the light receiving section.

Abstract: A Raman spectroscopy sensor integrated with an unmanned ground vehicle (UGV) includes a UGV having a robot arm and a camera mounted on the robot arm. A laser and telescope associated with a Raman sensor are mounted on the robot arm in such a way as to point in substantially the same direction in which the camera is pointed. A Raman spectral data acquisition and control module is mounted on the UGV and is configured to receive Raman spectral data from the telescope. A remote base station having a display and a data processing and analysis module is configured to receive data from the data acquisition and control module and to display for an operator images from the camera and information related to the Raman sensor. An autofocus system is preferably employed to automatically control telescope focus and thereby enable the Raman sensor to operate over a wide range, e.g., 0.5 m to 10 m.

Abstract: The present invention pertains to a system for the automated analysis of samples, comprising: a first optical device including at least one receptacle for receiving at least one of said samples and a receptacle-associated optical unit including at least one receptacle-associated light source for emitting light adapted for determining a color of said sample and generating a light beam for irradiating said sample contained in said receptacle and at least one receptacle-associated light detector for detecting light transmitted through said sample and generating a receptacle-associated detection signal; a second optical device including at least one test element provided with at least one test zone for applying said sample, said test zone being subject to an optically detectable change in response to at least one characteristic of said sample being different from said color and a test element-associated optical unit.