A method and system for detecting Staphylococcus aureus in chicken is provided. The method includes: obtaining hyperspectral images of samples; selecting spectral images at characteristic wavelengths based on the hyperspectral images of the samples, setting grayscale thresholds, and segmenting the selected spectral images to obtain a chicken sample region to be detected and a Staphylococcus aureus region to be detected; extracting hyperspectral data; extracting characteristic wavelengths after mixing the hyperspectral data of the chicken samples with the hyperspectral data of Staphylococcus aureus; selecting the hyperspectral data of the chicken samples corresponding to the extracted characteristic wavelengths to train a support vector machine model, thereby obtaining a detection model for Staphylococcus aureus; and detecting Staphylococcus aureus in chicken by using the detection model for Staphylococcus aureus.

Disclosed herein is an apparatus including a structure containing a multiphase fluid and having a transparent window. A collimated light source emits light through the transparent window structure at a wavelength at which a component of a desired phase of the multiphase fluid is absorptive. A photodetector is positioned such that the emitted light passes through the multiphase fluid in the structure and out through the transparent window structure to impinge upon the photodetector. The photodetector has an actual dynamic range for light detection. Processing circuitry adjusts a power of the collimated light source in a series of steps dependent upon a relationship between an output level of the photodetector and a threshold to cause measurement of the emitted light over an effective dynamic range greater than the actual dynamic range. Properties of the multiphase fluid are determined as a function of the measured emitted light.

An optical spectral sensing device for determining at least one property of a fluid. The device has an elongated porous body, a first end and a second end, a solid-state optical emitter at the first end of the body oriented to emit radiation toward the second end of the body, and a solid-state optical detector at the second end of the body oriented to detect radiation emitted by the optical emitter and to output a signal responsive to absorption of radiation. The device is configured to determine depth of a fluid based on the signal output by the optical detector.

A gas concentration sensor is includes an integrated die-form electromagnetic radiation source and an integrated die-form infrared detector. In one or more implementations, the gas concentration sensor includes a package substrate defining at least one aperture, a gas permeable mesh coupled to the package substrate and covering at least a portion of the at least one aperture, a die-form electromagnetic radiation source positioned in an interior region of the package substrate, a die-form detector positioned in the interior region of the package substrate, and control circuitry operably coupled to the die-form detector and configured to detect and calibrate one or more signal outputs from the die-form detector to determine a gas concentration within the interior region of the package substrate. The gas concentration sensor can be configured for specific detection of various gases through control of the spectral wavelengths emitted by the electromagnetic radiation source(s) and/or detected by the detector(s).

A method for analyzing a metalloprotein and/or the interaction with its environment comprising the following steps: (a) Providing a medium that enhances the detection of the electromagnetic cross-section signal of metalloproteins, (b) Incorporating a metalloprotein to analyse into said medium, (c) Contacting said medium with electromagnetic radiation, (d) Obtaining the electromagnetic cross-section spectrum of said metalloprotein, (e) Determining from said electromagnetic cross-section spectrum at least one parameter related to one or several analytes of interest.

A minimum peak is determined from analysis results, a correction wavelength at which an S/N ratio of the minimum peak is greatest is determined, and the determined correction wavelength is used to execute correction of the minimum peak. A plurality of detector output value correction method are registered in a processor, correction method is selected from default correction method or from among a plurality of preset correction methods according to an object to perform correction.

Optical system includes a front group, light-shielding member, and rear group that are arranged in this order in direction from object side toward image side. The light-shielding member is provided with opening elongated in first direction. The front group does not image the object at the opening in first section parallel to the first direction and forms intermediate image of the object at the opening in second section perpendicular to the first direction. The rear group has diffractive surface that splits light beam that passes through the opening into light beams at different wavelengths in the second section and focuses the light beams on different locations in the second section. Light beam that is emitted from the front group 11 and that enters the opening is non-parallel light in the first section.

Systems, apparatuses and methods for rapidly evaluating light transmission through coatings including paints, primers, thin films, surfacing films, laminates and the like are disclosed. The system includes a light source for transmitting light through a coating sample. A sample holder holds the coating sample in a position to receive the incident light. A spectrometer measures an amount of the transmitted light that passes through the coating sample. Optionally, one or more optical filters may be used to condition any transmitted light that passes through the coating sample to reduce the intensity of the light outside of wavelengths of interest. An opaque cover encloses the spectrometer, the one or more optional optical filters, and at least part of the sample holder to prevent light other than the transmitted light from the light source from entering the spectrometer such that any transmitted light passing through the coating sample can be accurately evaluated.

A method of measuring a concentration of NO.sub.2 in a gaseous mixture using a multimode laser beam that covers a tunable spectral range with a width of no more than 5 nm, wherein the multimode laser beam provides a high resolution transmittance spectrum at an absorption cross section of NO.sub.2 molecules, and a system for measuring the concentration of NO.sub.2 in the gaseous mixture. Various combinations of embodiments of the system and the method are provided.

A blood coagulation analyzer and analyzing method perform following: (a) preparing a measurement specimen by dispensing a blood specimen and a reagent into a reaction container; (b) emitting light of a plurality of wavelengths to the measurement specimen in the reaction container, the wavelengths comprising a first wavelength for use in a measurement by a blood coagulation time method, and at least one of a second wavelength for use in a measurement by a synthetic substrate method and a third wavelength for use in a measurement by an immunoturbidimetric method; (c) detecting light of a plurality of wavelengths corresponding to the light emitted in (b), from the measurement specimen, by a light receiving element, and acquiring data corresponding to each wavelength; and (d) conducting an analysis based on the data corresponding to one of the wavelengths among the acquired data, and acquiring a result of the analysis.