Abstract: An apparatus for testing an optical test piece comprising an interferometer for emitting an incident light beam. The apparatus includes a first reflective optic that receives the incident beam and produces a first reflected beam by focusing and expanding the received incident beam. The apparatus also includes a second reflective optic that receives and collimates the first reflected beam and outputs the collimated beam toward the optical test piece. Both the first and the second reflective optics are fixed to their respective positions relative to a thermally insensitive platform and the optical test piece is docked to the thermally insensitive platform and can be removed.

Abstract: An affordable flow cytometry system with a significantly increased analytical rate, volumetric sample delivery and usable particle size including a light beam that interrogates multiple flow streams so as to provide excitation across all of the streams, and an optical objective configured to collect light from the sample streams and image the light onto an array detector.

Abstract: Methods and apparatus provide for a Cart Inspector to create a suspicion level for a transaction when a video image of the transaction portrays an item(s) left in a shopping cart. Specifically, the Cart Inspector obtains video data associated with a time(s) of interest. The video data originates from a video camera that monitors a transaction area. The Cart Inspector analyzes the video data with respect to target image(s) associated with a transaction in the transaction area during the time(s) of interest. The Cart Inspector creates an indication of a suspicion level for the transaction based on analysis of the target image(s). Creation of a high suspicion level for the transaction indicates that the transaction's corresponding video images most likely portray occurrences where the purchase price of an item transported through the transaction area was not included in the total amount paid by the customer.

Abstract: A method of measuring a refractive index distribution includes steps of setting a plurality of different arrangements by a translation movement in a state where an object is arranged in first and second media having refractive indices different from a refractive index of the object, measuring transmissive wavefront of the object for each of media and each of the plurality of arrangements by reference light entering the object (S400), obtaining wavefront aberration corresponding to a difference between each transmissive wavefront and a reference transmissive wavefront (S500), obtaining refractive index distribution of the object by removing an influence of a shape error of the object using wavefront aberration of two media in which the object is arranged at the same position (S70), and obtaining refractive index distribution information of the object based on a plurality of refractive index distributions corresponding to the plurality of arrangements (S80).

Abstract: An on-line optical inspection and monitoring system is externally mounted to existing man way service access within the combustor housing. A replacement man way cover having an optical window is mounted to the combustor housing. One or more optical cameras are oriented so that the camera field of view (FOV) is directed through the man way cover optical window. The camera FOV is moved to plural positions within the combustion section, such as under control of an automated motion control system, and images are captured. Multiple images are combined to form a composite image, which may include an image of an entire transition within the combustion section. Visual images and/or infrared (IR) thermal images may be captured. Thermal image information is correlated with component temperature. Image information is utilized to determine vibration characteristics of the imaged components.

Abstract: A surface enhanced Raman spectroscopy (SERS) analytical device includes a substrate having a porous structure, and a plurality of plasmonic nanoparticles embedding in the porous structure and forming a sensing region. A method of detecting a target analyte in a sample includes contacting the sample with the substrate, whereby the target analyte, if present in the sample, is concentrated in the sensing matrix. The substrate may then be analyzed using SERS detection equipment.

Abstract: The fiber direction of a carbon fiber material of a test object is detected by means of the polarization direction of light reflected by the test object. If, for example, non-polarized light impinges upon carbon fibers, light reflected by the fibers is polarized in fiber direction.

Abstract: A spectral characteristic obtaining apparatus including a light irradiation unit configured to emit light onto a reading object; a spectroscopic unit configured to separate at least a part of diffused reflected light from the light emitted onto the reading object by the light irradiation unit into a spectrum; and a light receiving unit configured to receive the diffused reflected light separated into the spectrum by the spectroscopic unit and to obtain a spectral characteristic. The light receiving unit is configured to be a spectroscopic sensor array including plural spectroscopic sensors arranged in a direction, and the spectroscopic sensors include a predetermined number of pixels arranged in the direction to receive lights with different spectral characteristics from each other.

Abstract: A miniature spectrometer comprises an input unit, an image capture unit, a miniature diffraction optical grating, an optical grating accommodation slot, a cushion, and an affixing plate. The miniature spectrometer may further comprise a waveguide device, and the optical grating accommodation slot is positioned in a space defined by an opening of the waveguide device. The input unit receives an optical signal which proceeds in the waveguide device. The miniature diffraction optical grating separates the optical signal into numerous spectral components to be projected onto the image capture unit. The cushion is stacked on the miniature diffraction optical grating, with both disposed in the optical grating accommodation slot. The affixing plate is disposed on the waveguide device to apply a compressing force on the cushion to affix the miniature diffraction optical grating in the optical grating accommodation slot.

Abstract: A welding inspection method has steps of: generating transmission laser light for generating an ultrasonic wave and transmitting the transmission laser light to an object to be inspected during or after welding operation for irradiation; generating reception laser light for detecting an ultrasonic wave and transmitting the reception laser light to the object to be inspected for irradiation; collecting laser light scattered and reflected at surface of the object to be inspected; performing interference measurement of the laser light and obtaining an ultrasonic signal; and analyzing the ultrasonic signal obtained by the interference measurement. At least one of the transmission laser light generated in the transmission laser light irradiation step and the reception laser light generated in the reception laser light irradiation step is irradiated onto a welded metal part or a groove side surface.

Abstract: Provided are an apparatus and method for recognizing an object on the basis of property information on an object obtained using a multi-wavelength spectrometer. An apparatus for recognizing an object using a multi-wavelength spectrometer includes an image processing unit configured to extract an region of interest from an input three-dimensional image and output shape information on the region of interest, a light irradiation unit configured to irradiate light of a plurality of wavelengths to an arbitrary position of an object corresponding to the detected region of interest, a light receiving unit configured to measure a spectrophotometric value for each light of the plurality of wavelengths, and a light processing unit configured to generate a differential spectrophotometric map using a differential value between spectrophotometric values of different wavelengths measured at the same light irradiation position, and recognize the object using the differential spectrophotometric map and the shape information.

Abstract: Spectroscopy systems and methods of comb-based spectroscopy are provided. A light source generates light corresponding to a frequency comb. A prism cavity is optically coupled to the light source. The prism cavity receives the generated light and produces first and second output light. The first output light is associated with reflection of the received light within the prism cavity. The second output light is associated with transmission of the received light through a prism of the prism cavity. A coupling system is coupled to the light source and the prism cavity. The coupling system adjusts a characteristic of at least one of the light source or the prism cavity, based on at least one of the first output light and the second output light. The characteristic is adjusted to increase optical coupling between the light source and the prism cavity and to compensate for a dispersion of the prism cavity.

Abstract: A modular device includes base and color sensing portions. The color sensing portion has a face, a controlled light source having a first channel between the light source and the face, and a color sensor arranged at a distal end of a second channel. The color sensor receives light reflected from the target surface and generates output signals representative of a surface color. The first and second channels extend at least 45 degrees apart from each other and respective to the face. The base portion communicates with the color sensor and a user interface enabling control input for the color sensor. The program further receives the output signals from the color sensing device and displays a first image of the detected color, and displays a second image of a user-selected color beside the first image. Color data values are further displayed corresponding to the difference between displayed colors.

Abstract: An optical scanning system may include a moving sample positioning stage that supports the sample during an optical measurement of the sample using the light source and the spectrometer. The moving sample positioning stage may move the sample in at least one direction during the optical measurement of the sample. A scatterometer system may include collection imaging optics for imaging the reflected light onto a multi-pixel sensor that collects and analyze the reflected light.

Abstract: A displacement detecting device includes an irradiation optical system, an interference optical system, a light-receiving section, and a displacement detecting section. The irradiation optical system causes two light-beams to be incident on a diffraction grating respectively at different angles with respect to a plane perpendicular to the X-direction along which grating structures of the diffraction grating are periodically arranged. The interference optical system causes two Mth-order diffracted lights of respective light-beams incident on the diffraction grating to interfere with each other, so as to generate an interference light. The light-receiving section receives the interference light and detects an interference signal. The displacement detecting section detects a vertical displacement of a surface having the diffraction grating arranged thereon based on the change of the interference signal.

Abstract: An optical device includes a telecentric optical system, a variable wavelength interference filter, and a detection section, the variable wavelength interference filter includes a first reflecting film, a second reflecting film provided to a movable section, and an electrostatic actuator adapted to displace the movable section, an effective measurement area capable of transmitting a light with a wavelength, which is within a predetermined allowable range centered on a measurement center wavelength when an amount of the displacement of the movable section takes a maximum displacement value, is set in the first reflecting film and the second reflecting film, and the telecentric optical system guides the incident light to the variable wavelength interference filter so that a principal ray of the incident light is parallel thereto and perpendicular to the first reflecting film, and at the same time, collects the incident light in the effective measurement area.

Abstract: The invention relates to an electro-optical device for measurements of flow for the characterization of microparticles, comprising a measurement chamber (CUM) in which there circulates the flow of the fluid to be characterized, at least two luminous sources (S1,S2) of disjoint spectra, a device for measuring resistivity (RES), and at least three other detectors (D1,D2,D3) each allowing the measurement of an optical parameter, the optical parameters being chosen from among fluorescence (FL), extinction (EXT), wide angle diffraction (SSC) and small angle diffraction (FSC).

Abstract: The present invention relates to a Brillouin optoelectronic measurement method comprising the step of, providing a signal (s1) in an optical fiber (100), wherein said signal (s1) is time-frequency coded. The present invention further relates to a corresponding device for use in such a method.

Abstract: Systems and methods for sideband heterodyning detection are provided. In certain embodiments a system includes an optical resonator configured to allow light to resonate therein; at least one light source that is controlled to form multiple optical fields, wherein each field is phase or frequency modulated at a common modulation frequency and is at a different frequency. The system also comprises multiple heterodyne modulators that phase or frequency modulate a respective field in the multiple fields at a respective heterodyne frequency to form multiple sidebands, wherein the corresponding heterodyne frequency is different for each heterodyne modulator; at least one coupler that couples the multiple sidebands into the optical resonator; and a feedback control that is configured to detect the multiple sidebands transmitted out of the resonator to create multiple detected sideband signals and adjust frequencies of the plurality of fields based on the multiple detected sideband signals.

Abstract: An image capturing apparatus includes a dividing unit configured to divide light from a light source into reference light and measurement light; a first dichroic mirror arranged in a measurement optical path for guiding the measurement light to an object to be examined; a second dichroic mirror arranged in a reference optical path for guiding the reference light to a reference object; and a light receiving unit configured to receive interference light between the measurement light passing through the first dichroic mirror and the reference light passing through the second dichroic mirror.