The measurement of solar irradiance measurement have important applications, including solar resource assessment, solar power plants, photovoltaic system monitoring, heating and cooling loads of buildings, climate modeling and weather forecasting. An option to establish this is to solely measure the global horizontal irradiance and employ an irradiance decomposition algorithm to derive direct normal irradiance and diffuse horizontal irradiance. However, these models vary in complexity and generally have a relatively high uncertainty particularly between latitudes +60° N and −45° S these errors which includes large portions of North America, Europe, Russia, and Asia where the applications are centered. The inventors have established an improved methodology based upon an improved decomposition algorithm yielding improved accuracy in derived solar irradiance measurements in conjunction with a low cost non-moving part spectral pyranometer supporting spectral global irradiance measurements and spectral clearness indices.

A field spectral radiometer includes a support structure and a remote sensing head disposed on the support structure. The remote sensing head includes a central axis, a first optical element disposed on a first side of the central axis and defining a first optical path for a first optical channel, and a second optical element disposed on a second side of the central axis and defining second optical path for a second optical channel. An instrumentation assembly disposed on the support structure. the instrumentation assembly includes a first detection path associated with the first optical channel and a second detection path associated with the second optical channel, the first and second detection path include optical indexers for manipulating the first and second optical channels. The field spectral radiometer may include a calibration assembly disposed on the base. The calibration assembly may include a calibrating light source for calibrating the remote sensing head.

The present invention relates to the design, construction, and operation of a laser air-sampling multi-spectrometer; its operation with variable laser energy to simultaneously and/or sequentially perform spectrometric techniques of LAS, LEFS, RSS, and LIBS. The combined spectrometric operation will detect gas and particulate chemicals directly in a flowing stream of air sample and/or particulate chemicals on filter collected from the flowing stream of air sample.

An apparatus includes a substrate transmissive of electromagnetic energy of at least a plurality of wavelengths, having a first end, a second end, a first major face, a second major face, at least one edge, a length, a width, and a thickness, at least a first output optic that outputs electromagnetic energy the substrate; and a first input optic oriented and positioned to provide electromagnetic energy into the substrate via at least one of the first or the second major face of the substrate. The first output optic is laterally spaced from the first input optic. A number of reflectors and optional absorbers may be positioned proximate the first major face and/or the second major face to structure electromagnetic energy and/or to translate such from the first input optic to the first output optic. The apparatus may be part of a spectrometer or other optical system.

In a spectrometry device, a control unit controls a light source so that input of excitation light to an internal space is maintained in a first period, and that the input of the excitation light to the internal space is stopped in a second period, and the analysis unit calculates the photoluminescence quantum yield of a long afterglow emission material on the basis of the number of absorbed photons of the long afterglow emission material obtained on the basis of excitation light spectral data in the first period and the number of light emission photons of the long afterglow emission material obtained on the basis of light emission spectral data in any of the first period, the second period, and a total period of the first period and the second period.

Provided herein are accessories for measuring a small sample using an optical spectrometer. A small sample accessory may include a sample holder to hold a small sample in optical communication with an optical spectrometer and a shell configured to reflect light from an illumination source away from the optical spectrometer.

The invention discloses a portable visible/near-infrared spectrum detection device, comprising a housing, a bottom plate, a screen support frame, a battery part on which a microprocessor is arranged, a detection part and a switch part, wherein the battery part, the detection part and the switch part are arranged in the housing; and the detection part comprises a spectrometer, a light source, a collimating mirror and the microprocessor. The device has the characteristics of rapidness, no damage and portability, and can realize rapid detection and early warning of food quality.

A wavelength shift correction system and method includes a wavelength shift correction light source that emits wavelength shift correction light including a plurality of rays of wavelength shift correction emission-line light; and a spectrometer including a spectroscopic unit that receives the respective rays of dispersed spectral light obtained by dispersing incident light in accordance with wavelength with a plurality of photoelectric converters in the dispersion direction, and outputs electrical signals corresponding to the light intensities of the rays of dispersed spectral light. When the wavelength shift correction light is measured as the incident light with the spectrometer to be subjected to wavelength shift correction, a wavelength variation is determined on the basis of the respective electrical signals output from a plurality of specific photoelectric conversion elements that receive the plurality of rays of wavelength shift correction emission-line light in the plurality of photoelectric conversion elements.

A Multichromatic Calibration (MC) method of at least a spectral sensor which is one of a list comprising at least a spectrometer, a multispectral sensor, a hyperspectral sensor, a spectral camera, a color camera. The method comprises a. generating a plurality of different multichromatic spectra, wherein i. a spectrum from the plurality of different multichromatic spectra contains light intensity measurable by the at least one spectral sensor and by a reference spectral device, and ii. a spectrum from the plurality of different multichromatic spectra contains light centered around at least two different wavelengths and is configured to be integrated during an exposure time of a single measurement from any of the at least one spectral sensor or the reference spectral device; b. measuring each multichromatic spectrum of the plurality of different multichromatic spectra with the reference spectral device and the at least one spectral sensor; and from all data of the measured multichromatic spectra, compute a transfer function which relates a response of the at least one spectral sensor to a corresponding response of the reference spectral device, without measuring the spectral response of the at least one spectral sensor.

There is provided a calibration apparatus including one or a plurality of first processors programmed to: obtain spectrum images from a spectral camera that images light from alight source portion; obtain a spectral reference value from a measurement result of a calibration reference device that measures the light; extract a gradation value at a correction point that is a pixel which generates a correction matrix among the spectrum images as a measurement value; divide the measurement value at the correction point and the spectral reference value by a luminance value of the light emitted from the light source portion to obtain a normalized measurement value and a normalized reference value; and calculate the correction matrix based on the normalized measurement value and the normalized reference value.