Abstract:
A portable hyperspectral imager. The imager is modular and may include a hyperspectral camera and a removably-coupled mobile display module. The hyperspectral camera may include an Offner spectrometer. The mobile display module may be adapted to receive data from the hyperspectral camera and may include an internal camera. The mobile display module may include a cell phone or a tablet computer. The mobile display module may be integrally attached to the hyperspectral camera. The integral attachment may include a data link or USB connection. The length of the data link or USB connection may be less than 6 inches and the imager may weigh less than one pound. The imager may include a battery module or a scanning optical module.
Abstract:
In an embodiment, an apparatus includes a module assembly and a main assembly. The module assembly includes a module assembly housing, a first face plate and an analysis unit attached to the first face. The main assembly includes a main assembly housing, a second face plate and an engine unit rigidly attached to the second face plate. The engine unit generates a light that passes to the analysis unit via a first lens assembly and a second lens assembly. The first lens assembly is attached to the first face plate and the second lens assembly is attached to the second face plate. The module assembly when attached to the main assembly causes the first and second face plates to act as a single mechanical unit that moves independent of movement of the module assembly housing and/or the main assembly housing.
Abstract:
A spectrum sensing method includes (a) receiving an incident radiation simultaneously through a filter array composed of multiple bandpass filters, (b) digitizing spectral responses of the filter array, and (c) generating an estimate of spectral profile of the incident radiation based on digitized spectral responses of the filter array.
Abstract:
A spectrum sensing method includes (a) receiving an incident radiation simultaneously through a filter array composed of multiple bandpass filters, (b) digitizing spectral responses of the filter array, and (c) generating an estimate of spectral profile of the incident radiation based on digitized spectral responses of the filter array.
Abstract:
The disclosure relates to a portable system having a fiber array spectral translator ("FAST") for obtaining a spatially accurate wavelength-resolved image of a sample having a first and a second spatial dimension that can be used for the detection of hazardous agents by irradiating a sample with light, forming an image of all or part of the sample using Raman shifted light from the sample, and analyzing the Raman shifted light for patterns characteristic of one or more hazardous agents.
Abstract:
A color measurement system includes a hand held color measurement instrument, which may be provided with a, wireless interface to a computer The color measurement system includes a scanning guide for holding the Band held color measurement trùment in proper alignment with a color target.- The scanning guide includes a calibration reference to allow convenient calibration of the hand-held color measurement instrument. The hand-held color instrumentt includes an illumination ring to provide visual feedback to the user. The color of the illumination' ring changes in order to display a color imilar to that being read by the hand-held color measur ment instrument. Color management profiling of the hand field color measurement instrurn nt illumination ring improves the color rendition capability of the illumination ring.
Abstract:
A method for obtaining a target color measurement using an electronic image capturing device comprising the steps of: (1) determining one or more of a field correction array, level correction vectors, a color correction matrix, and a calibration correction and; (2) adjusting a target color measurement based upon one or more of a field correction array, level correction vector, a color correction matrix, and a calibration correction to obtain a corrected color target measurement.
Abstract:
A field test-kit for analyzing arsenic concentration in water samples incudes a portable infrared beam photometer for measuring light absorbance in aqueous specimens. An infrared ligth emittng diode (120A, 120B) is configured to direct a beam of light through a specimen. A photodetecotr diode (130A, 130B) measures the intensity of light passing through the specimen. The photodetector (130A, 130B) output voltages relate to the light absorbed in the specimen and are displayed on a LCD (160) screen. To test for arsenic, molybdenum-blue color complexes. The light absorbance of a specimen with both arsenates and phosphates bound in molybdenum-blue color complexes is compared to that of a reference specimen in which phosphates but not arsenates are bound and converted. A quantitative value for the arsenic concentration in the water sample is determined from the differential light absorbance of the two specimens.
Abstract:
A spectrophotometer which is highly manufacturable at minimum cost nevertheless provides precision of measurement of spectra components of light which is projected therein by maintaining precise optical alignment of optical and electrical components thereof. These components are mounted in a module (16) which is contained in a housing having an entrance aperture (18) which defines an object area for light the spectrum of which is measured by a photodetector (44) in the module (16) at an image area. The module has a base plate provided by a printed circuit board (66) on which a closed wall (74) encompasses an area (a corral) on one side of the circuit board (66). The wall (74) is a one piece structure which extends to the vicinity of the edge of the board (66). It is assembled with the board (66) as a unitary structure so that the assembly is made torsionally rigid and resists bending in the plane of the board (66). The assembly also distributes compressive stress over the entire board (66). The module (16) may be sufficiently small size so as to be located in a housing which is hand held, thereby providing a hand-held spectophotometer.
Abstract:
A spectrometer configurable for field analyses of chemical properties of a material is provided. The spectrometer includes: at least one sensor adapted for providing Fourier transform infrared spectroscopy (FTIR) surveillance and at least another sensor for providing Raman spectroscopy surveillance. The spectrometer can be provided with a user accessible instruction set for modifying a sampling configuration of the spectrometer. A method of determining the most likely composition of a sample by at least two technologies using the spectrometer is also provided.