Abstract:
A colorimetric instrument includes a power control section adapted to vary the power to be applied to the light source between the wavelengths in accordance with at least one of spectral characteristics of the light source, spectral characteristics of the measurement optical system, and light receiving sensitivity characteristics of the light receiving section.
Abstract:
A sensor system for capturing and specifying individual particles (16) in a fluid includes a measurement cell (14) through which the fluid can flow, a light source (2; 30) that is arranged on the measurement cell (14) and creates a light beam (4; 36) passing through the measurement cell (14), and an intensity sensor (26; 44) that is arranged on the measurement cell (14) opposite the light source (2; 30) such that it captures the light beam exiting the measurement cell (14) and is designed for separately capturing the intensity (IA, IB) of the light beam in at least two different wavelength regions (λA, λB).
Abstract:
A system for characterizing material properties in miniature semiconductor structures performs a scatterometry analysis on inelastically scattered light. The system can include a narrowband probe beam generator and a detector. A single wavelength probe beam from the narrowband probe beam generator produces scattered light from a measurement pattern on a test sample. The scattered light is measured by the detector, and the measurement data (e.g., Raman spectrum) is used in a scatterometry analysis to determine material properties for the measurement pattern. The detector can measure either incoherent inelastically scattered light (e.g., using a spectrometer) or coherent inelastically scattered light (e.g., using an array detector). If the measurement pattern dimensions are substantially similar to actual device dimensions, the material property distributions determined for the measurement pattern can be applied to the actual devices on the test sample.
Abstract:
Emitting illumination light and auxiliary light having a wavelength range different from that of the illumination light onto an observation target simultaneously, obtaining an image formed of reflection light of the illumination light and reflection light of the auxiliary light reflected from the observation target, calculating, with respect to each pixel of the obtained image signal, estimated spectroscopic data in the wavelength range of the auxiliary light using a value of the image signal and estimated matrix data in the wavelength range of the auxiliary light stored in advance, obtaining quasi reflectivity information reflecting a reflectivity of the observation target in the wavelength range of the auxiliary light based on the estimated spectroscopic data in the wavelength range of the auxiliary light, and generating a special image based on the quasi reflectivity information.
Abstract:
The invention comprises a method and apparatus for enhancing the analysis of noninvasive spectra, resulting in improved analytical performance. More particularly, the invention comprises a method and apparatus for processing noninvasive spectra with an analyte filter that preferably rejects variation likely to be detrimental to the measurement system, while passing signal that probabilistically is unique to the target analyte. Subsequently, the analyte filtered data are used to estimate an analyte property, such as a glucose concentration, in the presence of noise, interferences, state changes, and/or across analyzers.
Abstract:
The invention relates to an apparatus and a method for improved correction of drift in an infrared measuring instrument. The measurement signal furnished by a thermal detector is split into a direct voltage component and an alternating voltage component. By means of calibration curves (24, 27), a calculated comparison variable T DC , korr 900 is formed from a measured, averaged concentration value c AC1 900 . The correction value ΔT for the drift correction is obtained from the difference between the corresponding measured size of the direct voltage component T DC 900 and the comparison variable T DC , korr 900 .
Abstract:
A sensitive fluid sensor for detecting fluids and particularly trace fluids. The sensor may be adjustable for detecting fluids of various absorption lines. To effect such adjustment, a tunable laser may be used. The laser may be an edge emitting diode, a VCSEL or other tunable source. The detection apparatus of the sensor may incorporate a sample cell through which a laser light may go through. The sample cell may comprise a tunable ring-down cavity. The ring-down cavity may be a ring laser cavity like that of a ring laser gyroscope. There may be a photo detector proximate to the ring down cavity connected to a processor.
Abstract:
An IR-spectrometric analyzing procedure, the measuring absorbance and reference absorbance being detected simultaneously from an IR light beam conducted to pass through the sample and diffracted to a spectrum. An IR spectrometer comprising a light source (1), a sample cuvette (5), a diffraction member (6), detectors (7) and a calculating means (9) for determining the content values of the sample corresponding to the measuring absorbance, the detectors (7) having been arranged to detect the measuring absorbance and the reference absorbance simultaneously from the beam that has passed through the sample and been diffracted to a spectrum.
Abstract:
A conversion and kit for a dual beam spectrophotometer permitting it to operate in dual wavelength mode and thereby obtaining resolution heretofore unavailable from similar machines. The present invention provides for a second light source and directs it through the sample. By eliminating the reference path of the dual beam machine, the second light source permits the converted dual beam spectrophotometer to work in dual wavelength mode and thereby generate higher resolution while using the same instrument. The conversion allows the spectrophotometer to be operated in dual beam mode and for the easy/rapid changing between dual beam and dual wavelength modes.