Abstract:
The present disclosure provides for a portable device for detecting the presence of explosive materials, including bulk explosive materials and out-gassed by products of explosive materials. The portable device may comprise a tunable filter and a NIR detector, configured so as to generate a NIR hyperspectral image representative of a target. The portable device may also comprise a RGB detector configured to generate a video image of a region of interest. The disclosure also provides for a method of detecting explosive materials using NIR hyperspectral imaging which may comprise collecting interacted photons, passing the interacted photons through a tunable filter, and detecting the interacted photons to generate a NIR hyperspectral image representative of a target. The method may also comprise surveying a region of interest using a RGB detector to identify a target for further inspection using NIR hyperspectral imaging.
Abstract:
Optical characteristic measuring systems and methods such as for determining the color or other optical characteristics of teeth are disclosed. Perimeter receiver fiber optics preferably are spaced apart from a source fiber optic and receive light from the surface of the object/tooth being measured. Light from the perimeter fiber optics pass to a variety of filters. The system utilizes the perimeter receiver fiber optics to determine information regarding the height and angle of the probe with respect to the object/tooth being measured. Under processor control, the optical characteristics measurement may be made at a predetermined height and angle. Various color spectral photometer arrangements are disclosed. Translucency, fluorescence, gloss and/or surface texture data also may be obtained. Audio feedback may be provided to guide operator use of the system. The probe may have a removable or shielded tip for contamination prevention. A method of producing dental prostheses based on measured data also is disclosed. Measured data also may be stored and/or organized as part of a patient data base. Such methods and implements may be desirably utilized for purposes of detecting and preventing counterfeiting or the like.
Abstract:
A method for analyzing a mixture includes identifying a plurality of possible components of the mixture, calculating at least one feature for at least a portion of the plurality of possible components, and calculating a probability value for at least a portion of the plurality of possible components based on the at least one feature and at least one transfer function
Abstract:
The present disclosure describes an optically powered transducer with a photovoltaic collector. An optical fiber power delivery method and system and a free space power delivery method are also provided. A fabrication process for making an optically powered transducer is further described, together with an implantable transducer system based on optical power delivery.
Abstract:
Optical characteristic measuring systems and methods such as for determining the color or other optical characteristics of teeth are disclosed. Perimeter receiver fiber optics preferably are spaced apart from a source fiber optic and receive light from the surface of the object/tooth being measured. Light from the perimeter fiber optics pass to a variety of filters. The system utilizes the perimeter receiver fiber optics to determine information regarding the height and angle of the probe with respect to the object/tooth being measured. Under processor control, the optical characteristics measurement may be made at a predetermined height and angle. Various color spectral photometer arrangements are disclosed. Translucency, fluorescence, gloss and/or surface texture data also may be obtained. Audio feedback may be provided to guide operator use of the system. The probe may have a removable or shielded tip for contamination prevention. A method of producing dental prostheses based on measured data also is disclosed. Measured data also may be stored and/or organized as part of a patient data base. Such methods and implements may be desirably utilized for purposes of detecting and preventing counterfeiting or the like.
Abstract:
A method for outputting a closest match of a plurality of electronically stored shade guide values of a dental shade guide system is disclosed. A protective tip including a hole for couples light from a probe to a measurement spot on a dental object. The probe is in proximity to a reference standard and a calibration/normalization measurement of the reference standard is taken. Light returned from the dental object is measured with an optical sensor. A first frequency proportional to an intensity of a first wavelength/spectral band of light is determined, a second frequency proportional to an intensity of a second wavelength/spectral band is determined, and a third frequency proportional to an intensity of a third wavelength/spectral band of light is determined. A closest match is selected of a plurality of electronically stored shade guide values of one or more dental shade guide systems.
Abstract:
The disclosure generally relates to a method and apparatus for compact dispersive imaging spectrometer. More specifically, one embodiment of the disclosure relates to a portable system for obtaining a spatially accurate wavelength-resolved image of a sample having a first and a second spatial dimension. The portable system can include a photon emission source for sequentially illuminating a plurality of portions of said sample with a plurality of photons to produce photons scattered by the sample. The photon emission source can illuminate the sample along the first spatial dimension for each of plural predetermined positions of the second spatial dimension. The system may also include an optical lens for collecting the scattered photons to produce therefrom filtered photons, a dispersive spectrometer for determining a wavelength of ones of the filtered photons, a photon detector for receiving the filtered photons and obtaining therefrom plural spectra of said sample, and a processor for producing a two dimensional image of said sample from the plural spectra.
Abstract:
The invention is directed to methods and systems of hyperspectral and multispectral imaging of medical tissues. In particular, the invention is directed to new devices, tools and processes for the detection and evaluation of diseases and disorders such as, but not limited to diabetes and peripheral vascular disease, that incorporate hyperspectral or multispectral imaging.
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 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.