Abstract:
Various implementations of optical computing devices are described herein which include a "tuning fork" probe, "spark plug" probe, "grooved tubular" and "modular" type implementation.
Abstract:
Various implementations of optical computing devices are described herein which include a "tuning fork" probe, "spark plug" probe, "grooved tubular" and "modular" type implementation.
Abstract:
A technique for forming a two-dimensional electronic spectrum of a sample includes illuminating a line within a portion of the sample with four laser pulses; where along the entire line the difference in the arrival times between two of the laser pulses varies as a function of the position and the difference in the arrival times between the other two pulses is constant along the entire line. A spectroscopic analysis may then be performed on the resulting pulsed output signal from the illuminated line to produce a single-shot two dimensional electronic spectroscopy.
Abstract:
A spectrograph usable as a demutiplexer/detector in a wavelength division multiplexing optical system. The spectrograph comprises a planar waveguide (50) and a detector array (52). The planar waveguide (50) has a dispersive edge (56) having an inwardly concave shape, an input edge (62), and a straight output edge (64). The dispersive edge (56) has a reflective diffraction grating (60) formed on it, the grating (60) having a variable line spacing. An optical input signal comprising a plurality of different wavelength ranges enters the waveguide at the input edge (62), and travels through the waveguide and strikes the grating (60). The grating (60) focuses the optical energy in each of the wavelength ranges at a focal spot at the output edge (64), the position of each focal spot being a function of wavelength. The detector array (52) comprises a plurality of photodetectors positioned along a straight line, such that the photodetectors are positioned at the focal spots. Each photodetector therefore detects the optical energy in one of the input ranges. A stack of such planar waveguides may be assembled to form a multi-channel spectrograph.
Abstract:
Spectrometer apparatus (10), for self-calibrating a color image scanner (30) of the line scanner or area scanner type, comprises a member (20), having an optical slit (18), movable into position on an optical axis (14) of the scanner between its polychromatic light source (12) and its focusable lens (16) in a plane occupied by a color image when it is scanned. A diffraction grating (24) is similarly movable onto the optical axis, a given distance from an image sensor (22) of the scanner. The light source illuminates the slit and the diffraction grating disperses transmitted polychromatic light according to its wavelength, forming duplicate spectra off-axis across respective halves of the image sensor, with longer wavelengths being diverted to respectively higher angles.
Abstract:
A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area. Methods are disclosed for performing dark-current calibration and/or radiometric calibration on data obtained by the hyperspectral sensing device, and/or another suitable device. Data obtained by the device may be represented in a functional basis space, enabling computations that utilize all of the hyperspectral data without loss of information.
Abstract:
Described herein is the use of a visible near infrared (VNIR) hyperspectral imaging system as a non-invasive diagnostic tool for early detection of Alzheimer's disease (AD). Also described herein is the use of a VNIR hyperspectral imaging system in high throughput screening of potential therapeutics against AD.
Abstract:
Described herein is the use of a visible near infrared (VNIR) hyperspectral imaging system as a non-invasive diagnostic tool for early detection of Alzheimer's disease (AD). Also described herein is the use of a VNIR hyperspectral imaging system in high throughput screening of potential therapeutics against AD.
Abstract:
An optical instrument for spectroscopy applications includes a compact arrangement having a three-dimensional folded optical path. A plate configured as an optical reference plane is secured to a housing and is configured to secure optical components above or below the plate. A modular light source module may be secured within the housing without fasteners. A monochromator and spectrometer are secured below the plate. Mirrors disposed above the plate are configured to direct light from the monochromator passing through a first opening in the plate through a sample disposed above the plate, and to direct light from the sample through a second opening in the plate to the spectrometer. A controller is configured for communication with the monochromator and the spectrometer. The controller may control an entrance slit actuator for the spectrometer and positioning of an aperture upstream of the spectrometer to adjust resolution and throughput.
Abstract:
Disclosed is an imaging apparatus including: a spectroscopic measurement section configured to measure a spectral characteristic of a subject; a spectral image capture section configured to capture a subject image separated into a plurality of colors through color separation to create a plurality of spectral images; and a color separation characteristic determining section configured to determine a color separation characteristic to be used for image capturing of the spectral image capture section, based on the spectral characteristic of the subject measured by the spectroscopic measurement section. The color separation characteristic determining section determines a count of color separations in the image capturing of the spectral image capture section and spectral bands corresponding to each of the color separations.