Abstract:
A spectroscopic measurement apparatus 1A comprises an integrating sphere 20 in which a sample S is located, a spectroscopic analyzer 30 dispersing the light to be measured from the sample S and obtaining a wavelength spectrum, and a data analyzer 50. The analyzer 50 includes an object range setting section which sets a first object range corresponding to excitation light and a second object range corresponding to light emission from the sample S in a wavelength spectrum, and a sample information analyzing section which determines a luminescence quantum yield of the sample S, determines a measurement value ¦ 0 of the luminescence quantum yield from results of a reference measurement and a sample measurement, and determines, by using factors ², ³ regarding stray light in the reference measurement, an analysis value ¦ of the luminescence quantum yield with the effect of stray light reduced by ¦ = ²¦ 0 +³. This realizes a spectroscopic measurement apparatus, a measurement method, and a measurement program which can reduce the effect of stray light generated in a spectrometer.
Abstract:
Solar spectral irradiance (SSI) measurements are important for solar collector/photovoltaic panel efficiency and solar energy resource assessment as well as being important for scientific meteorological/climate observations and material testing research. To date such measurements have exploited modified diffraction grating based scientific instruments which are bulky, expensive, and with low mechanical integrity for generalized deployment. A compact and cost-effective tool for accurately determining the global solar spectra as well as the global horizontal or tilted irradiances as part of on-site solar resource assessments and module performance characterization studies would be beneficial. An instrument with no moving parts for mechanical and environment stability in open field, non-controlled deployments could exploit software to resolve the global, direct and diffuse solar spectra from its measurements within the 280-4000 nm spectral range, in addition to major atmospheric processes, such as air mass, Rayleigh scattering, aerosol extinction, ozone and water vapour absorptions.
Abstract:
In the spectroscopy module 1, a light absorbing layer 6 having a light-passing hole 6a through which light L1 advancing into a spectroscopic portion 3 passes and a light-passing hole 6b through which light L2 advancing into a light detecting portion 4a of a light detecting element 4 passes is integrally formed by patterning. Therefore, it is possible to prevent deviation of the relative positional relationship between the light-passing hole 6a and the light-passing hole 6b. Further, since the occurrence of stray light is suppressed by the light absorbing layer 6 and the stray light is absorbed, the light detecting portion 4a of the light detecting element 4 can be suppressed from being made incident. Therefore, according to the spectroscopy module 1, it is possible to improve the reliability.
Abstract:
An optical interferometer 1A includes a branching-combining unit 10, a first optical system 20, a second optical system 30, and a drive unit 40, which can be MEMS-based components. The branching-combining unit 10 includes a branching surface 11, an incident surface 12, an output surface 13, and a combining surface 14 on an interface between the interior and the exterior of a transparent member. The branching-combining unit 10, on the branching surface 11, partially reflects incident light L 0 and outputs as first branched light L 11 , and transmits the rest of the incident light into the interior as second branched light L 21 . The branching-combining unit 10, on the combining surface 14, outputs the first branched light L 12 to the outside, reflects the second branched light L 22 , and combines the light beams to be output to the outside as combined light L 3 . Thus, a MEMS-based optical interferometer capable of decreasing light loss from branching to combining and improving interference efficiency is realized.
Abstract:
Methods and apparatus for laser induced breakdown spectroscopy (LIBS) sample chamber. An apparatus includes a sample chamber, a laser source connected to an excitation optics assembly, the excitation optics assembly connected to a first port on the sample chamber, a collimator assembly connected to a spectrometer, the collimator assembly connected to a second port on the sample chamber, and a first lens tube positioned on the first port and a second lens tube positioned on the second port, the first lens tube protecting the first port connected to the excitation optics assembly and the second lens tube protecting the second port connected to the collimator assembly from particles emitted when a laser pulse from the laser source ablates a surface of a target sample and generates a plasma.
Abstract:
It is object to suppress a fluctuation in an amount of light reflected from a to-be-illuminated surface having a directional property in reflectance characteristics and improve usage efficiency of a bundle of light beams emitted from a light source. In order to achieve the above object, an illumination device that illuminates a to-be-illuminated surface, includes: a surface light source being disposed on a normal line of the to-be-illuminated surface; and a reflection mechanism being provided between the surface light source and the to-be-illuminated surface so as to surround the normal line for reflecting a light emitted from the surface light source toward the to-be-illuminated surface, wherein in the reflection mechanism, a reflection region that reflects the light toward the to-be-illuminated surface and a non-reflection region that does not reflect the light toward the to-be-illuminated surface are alternately disposed along a virtual cylindrical surface surrounding the normal line in a circumferential direction of the virtual cylindrical surface, and three or more reflection regions and three or more non-reflection regions are thereby disposed, each of the three or more reflection regions is a region having a partially-cylindrical shape to follow the virtual cylindrical surface, and the three or more non-reflection regions are dispersedly disposed to surround the normal line in the circumferential direction.
Abstract:
A protective sheath having a closed end and an open end is sized to receive a hand held spectrometer. The spectrometer can be placed in the sheath to calibrate the spectrometer and to measure samples. In a calibration orientation, an optical head of the spectrometer can be oriented toward the closed end of the sheath where a calibration material is located. In a measurement orientation, the optical head of the spectrometer can be oriented toward the open end of the sheath in order to measure a sample. To change the orientation, the spectrometer can be removed from the sheath container and placed in the sheath container with the calibration orientation or the measurement orientation. Accessory container covers can be provided and placed on the open end of the sheath with samples placed therein in order to provide improved measurements.
Abstract:
The present invention relates to a spectrometer module (10), comprising: a plurality of separate electronic circuit modules (20), each comprising an integrated sensor circuit including a light sensitive area (22) occupying part of an area of the integrated sensor circuit, the integrated sensor circuit being arranged to detect incident light, wherein the plurality of separate electronic circuit modules (20) include a group of adjacent electronic circuit modules (20) and the light sensitive areas (22) of the electronic circuit modules (20) are so arranged on the respective integrated sensor circuits that the group is mounted so that the light sensitive areas (22) thereof are arranged in vicinity to each other, and an optical module (10), which is common to said plurality of separate electronic circuit modules (20) and arranged to direct incident light towards the light sensitive areas (22) of each of said electronic circuit modules (20).
Abstract:
An optical assembly is disclosed including two laterally variable bandpass optical filters stacked at a fixed distance from each other, so that the upstream filter functions as a spatial filter for the downstream filter. The lateral displacement may cause a suppression of the oblique beam when transmission passbands at impinging locations of the oblique beam onto the upstream and downstream filters do not overlap. A photodetector array may be disposed downstream of the downstream filter. The optical assembly may be coupled via a variety of optical conduits or optical fibers for spectroscopic measurements of a flowing sample.
Abstract:
The invention relates to an optical sensor device which measures in a spatially resolving manner. In order to devise such a sensor device with which a contacting measurement of the article to be measured can be carried out and which can be mass-produced, the sensor device is designed such that a transfer of the calibration onto individual sensor devices is possible with high accuracy. According to certain embodiments of the design of the sensor device and of the evaluation methods, interferences with the measurement of the amount of the target substance are minimized.