Abstract:
A robotically controlled steerable gimbal (30) mounted virtual broadband hyperspectral sensor (40) system and methods provide a highly mobile, rapidly responsive and innovative system of locating targets and exploiting hyperspectral and ultraspectral imaging and non-imaging signature information in real-time from an aircraft or ground vehicles (V) from overhead or standoff perspective in order to discriminate and identify unique spectral characteristics of the target. The system preferably has one or more mechanically integrated hyperspectral sensors (40) installed on a gimbal backbone and coboresighted with a similarly optional mounted color video camera and optional LASER (47) within an aerodynamically stable pod shell constructed for three-dimensional stabilization and pointing of the sensor on a direct overhead or off-nadir basis.
Abstract:
An individualized modeling equation for predicting a patient's blood glucose values is generated as a function of non-invasive spectral scans of a body part and an analysis of blood samples from the patient, and is stored on a central computer. The central computer predicts a blood glucose value for the patient as a function of the individualized modeling equation and a non-invasive spectral scan generated by a remote spectral device. If the spectral scan falls within the range of the modeling equation, the predicted blood glucose level is output to the patient. If the spectral scan falls outside the range of the modeling equation, regeneration of the model is required, and the patient takes a number of noninvasive scans and an invasive blood glucose level determination. The computer regenerates the individualized modeling equation as a function of the set of spectral scans and corresponding blood glucose values.
Abstract:
A spectrometer (10) provides a substantially simultaneous electronic output over a broad spectral range while maintaining a relatively high resolution. The spectrometer (10) uses a fiber-optic transformer (14) having an arcuate one-dimensional input region, associated with the image plane (26) of a Rowland circle (25), and produces a rectangular two-dimensional output image, for illuminating the active area of a two-dimensional CCD sensor (38).
Abstract:
An imaging apparatus and method are provided for improving discrimination between parts of a scene enabling enhancement of an object in the scene. A camera unit (12) is arranged to capture first and second images from the scene (8) in first and second distinct and spectrally spaced apart wavebands. An image processing unit (14) processes the images so captured and processes polarimetric information in the images to enable better discrimination between parts of the scene. An image of the scene, including a graphical display of the polarimetric information, may be displayed on a visual display unit (16) thus enhancing an object in the scene for viewing by a user. Correlation parameters indicating, possibly on a pixel-by-pixel basis, the correlation between the actual image intensity (30) at each angle of polarisation and a modelled expected image intensity may be used to enhance the visibility of an object.
Abstract:
A system comprises a base defining a plane perpendicular to an axis, a set of elements mounted on a surface of the base parallel to the axis, and a drive assembly in communication with the base. Each element is positionable within a respective guide channel of a mechanical structure containing optical detectors, and each element includes a plurality of sites generally parallel to the axis for securing an optical filter. The drive assembly is configured to move the base along the axis to position a respective site of each element in the set of elements in the respective guide channel relative to an optical detector.
Abstract:
The present publication discloses a method and device for high speed chemical imaging system based on Fabry-Perot interferometer, the method comprising illuminating a sample by broadband light(1)through a High Pass Filter (22) and Low Pass Filter (21), using a Collimator lens (23) for gathering and collimating the scattered light from the target(2), using Piezo-actuated Fabry-Perot Interferometer (20) for filtering the incoming light,with a Filter wheel (24) to enable using high orders,using an Imager lens (24) to deliver the image on a 2D IR detector (25),and finally predicting chemical maps from measured spectral images.
Abstract:
An apparatus for measuring fluorescence of potable liquids contained within an optical quartz cell includes a deep UV laser or a compact UV LED that generates a light beam. A UV blocking and visible light transmitting optical filter reduces out-of-band emission from the LED. The optical quartz cell is between a pair of plane mirrors so that light from the light source travels through it several times. A concave mirror collects a fluorescence signal and has a common optical axis with a lens. The common optical axis is normal to an optical axis of the light beam. The concave mirror and lenses are positioned on opposite sides of the optical quartz cell. A fluorescence detector is in optical alignment with the concave mirror and the lens. A boxcar averager is in electrical communication with the fluorescence detector. Optical wavelength selection of the fluorescence emission uses optical filters or a spectrometer.
Abstract:
An electro-optical system 1 for the carrying out of radiometric measurements of luminous sources comprises an instrument 100 equipped with: a sensor 101 comprising a pixel matrix, an optical system 104 for creating the image of an external luminous source on the sensitive surface 134 of the sensor 101, an optical bandpass filter 105, 116 interposed between the sensor 101 and the external luminous source for separating the spectrum of radiation emitted by the external luminous source into two portions: the first portion having a relatively limited bandwidth is transmitted toward the sensor 101 while the second does not reach the sensor 101; moreover, the system 1 comprises a computer 130 which, starting from the plurality of monochromatic images recorded from the sensor 101, allows the calculating both of the angular distribution of the incident luminous radiation on the instrument and the irradiance on the normal plane in the direction from which the luminous radiation originates.