Abstract:
A compact spectrometer is disclosed that is suitable for use in mobile devices such as cellular telephones. In preferred embodiments, the spectrometer comprises a filter, at least one Fourier transform focusing element, a micro-lens array, and a detector, but does not use any dispersive elements. Methods for using the spectrometer as an end-user device for performing on site determinations of food quality, in particular, by comparison with an updatable database accessible by all users of the device, are also disclosed.
Abstract:
The invention relates to a sensor for checking value documents with a detection device having at least two photodetectors through which the detection light of the value document is detectable in at least two different spectral regions. The detection device contains a collecting optic common to the photodetectors, through which the detection light emitted by the value document in a detection region can be collimated to a light beam. Each of the photodetectors has associated therewith a detector lens which receives a partial light beam of the light beam collimated by the collecting optic and directs it onto the respective photodetector, so that the detection region substantially coincides for the different photodetectors. By the sensor there can be detected different spectral portions of the detection light of the same detection region separately from each other at the same point in time.
Abstract:
Embodiments of the present disclosure relate generally to the use of spectral sensors during a cardiac arrest event. More specifically, the present disclosure relates to the use of spectral sensors for measuring changes in pH and muscle oxygen saturation to estimate subject down time and evaluating the effectiveness of the clinical treatment administered during a cardiac arrest event. Given the narrow window of time in which emergency treatment must be administered, as well as the lack of information concerning the subject's condition, there is a need for a fast and accurate method of estimating the onset of the cardiac arrest emergency and evaluating the effectiveness of the emergency treatment being administered.
Abstract:
Naphthalene, benzene, toluene, xylene, and other volatile organic compounds VOCs have been identified as serious health hazards. Embodiments of the invention are directed to methods and apparatus for near-real-time in-situ detection and accumulated dose measurement of exposure to naphthalene vapor and other hazardous gaseous VOCs. The methods and apparatus employ excitation of fluorophors native or endogenous to compounds of interest using light sources emitting in the ultraviolet below 300 nm and measurement of native fluorescence emissions in distinct wavebands above the excitation wavelength. The apparatus of some embodiments are cell-phone-sized sensor/dosimeter “badges” to be worn by personnel potentially exposed to hazardous VOCs. The badge sensor of some embodiments provides both real time detection and data logging of exposure to naphthalene or other VOCs of interest from which both instantaneous and accumulated dose can be determined.
Abstract:
A noninvasive analyzer apparatus and method of use thereof is described for spatially separating light for use in noninvasively determining an analyte concentration of a subject through use of detectors linked to multiple controlled sample illumination zone to sample detection zone distances. The controlled radial separation of illumination and detection zones yields reduced deviation in total observed optical pathlength and/or control of pathlengths in a desired tissue volume for each element of a set of detector elements. Performance using the discrete detection zones is enhanced using a combination of segmented spacers, arcs of detector elements, use of micro-optics, use of optical filters associated with individual detector elements, control of detector response shapes, and/or outlier analysis achievable through use of multiple separate and related observed signals of a detector array.
Abstract:
An automated adaptive optics and laser projection system is described. The automated adaptive optics and laser projection system includes an adaptive optics system and a compact laser projection system with related laser guidance programming used to correct atmospheric distortion induced on light received by a telescope. Control of the automated adaptive optics and laser projection system is designed in a modular manner in order to facilitate replication of the system to be used with a variety of different telescopes. Related methods are also described.
Abstract:
Provided is an imaging device (1) having: a front optical system (10) that transmits light from an object; a spectral filter array (20) that transmits light from the front optical system (10) via a plurality of spectral filters; a small lens array (30) that transmits the light from the plurality of spectral filters via a plurality of small lenses respectively, and forms a plurality of object images; a picture element (50) that captures the plurality of object images respectively; and an image processor (60) that determines two-dimensional spectral information on the object images based on image signals output from the picture element (50). The front optical system (10) is configured to transmit the light from the focused object to collimate the light into a parallel luminous flux.
Abstract:
An uncooled microbolometer pixel for detection of electromagnetic radiation is provided that includes a substrate, a thermistor assembly and an absorber assembly. The thermistor assembly includes a thermistor platform suspended above the substrate, one or more thermistors on the thermistor platform, and an electrode structure electrically connecting the thermistors to the substrate. The absorber assembly includes an optical absorber over the thermistor assembly and a reflector provided under and forming a resonant cavity with the optical absorber. The optical absorber is in thermal contact with the thermistors and exposed to the electromagnetic radiation. The optical absorber includes a set of elongated resonators determining an absorption spectrum of the optical absorber. An array of microbolometer pixels is also provided, in which the resonators of different pixels can have different lengths determining different absorption spectra, thereby enabling configurable broadband and/or multi-frequency detection, in particular in the terahertz region.
Abstract:
Systems in a flow cytometer having an interrogation zone and illumination impinging the interrogation zone include: a lens subsystem including a collimating element that collimates light from the interrogation zone, a light dispersion element that disperses collimated light into a light spectrum, and a focusing lens that focuses the light spectrum onto an array of adjacent detection points; a detector array, including semiconductor detector devices, that collectively detects a full spectral range of input light signals, in which each detector device detects a subset spectral range of the full spectral range of light signals; and a user interface that enables a user to create a set of virtual detector channels by grouping detectors in the detector array, such that each virtual detector channel corresponds to a detector group and has a virtual detector channel range including the sum of subset spectral ranges of the detectors in the corresponding detector group.
Abstract:
The invention relates to a sensor having a filter arrangement, downstream of which there is arranged a detector arrangement, and an evaluating device connected to the detector arrangement. The filter arrangement has at least a first filter, the suspect filter, and at least one second filter, the reference filter(s). The first filter is configured as a band pass filter allowing the passage of a first predetermined band, the suspect band. The at least one second filter is configured as a band pass filter allowing the passage of a second predetermined band(s), the reference band(s). The detector arrangement has at least one detector associated with at least one of the filters. The band passes reference filters are distributed above and below the band pass of the suspect filter. The sensor with advantage could be utilized within the IR band, and could advantageously be used to detect CO2.