Abstract:
Systems, methodologies, media, and other embodiments associated with color measuring are described. One exemplary system embodiment includes a spectrophotometer, one or more light sources for illuminating an interior of the spectrophotometer, and a digital camera configured at a port of the spectrophotometer and being configured to measure light components from a sample. In the present invention, segmentation logic is provided for the spectrophotometer that is configured to employ computational image segmentation to characterize specular reflection from a sample and to characterize a selected patch or portion from the test sample, such as a selected color in a multicolor pattern. In accordance with the present invention, the spectrophotometer and the included digital camera may be color-characterized in situ.
Abstract:
An exemplary system includes a measuring device to acquire non-contact thickness measurements of a wafer and a laser beam to cut the wafer at a rate based at least in part on one or more thicknesses measurements. An exemplary method includes illuminating a substrate with radiation, measuring at least some radiation reflected from the substrate, determining one or more cutting parameters based at least in part on the measured radiation and cutting the substrate using the one or more cutting parameters. Various other exemplary methods, devices, systems, etc., are also disclosed.
Abstract:
Diffuse reflectance spectroscopy using near infrared and mid infrared radiation is used to detect the presence of organic chemical compounds in gems. Suitably, diffuse reflectance infrared Fourier transformation spectroscopy is employed to detect the presence of organic compounds in gems using mid infrared and near infrared radiation. The apparatus uses an integrating sphere or integrating cylinder with a probe that acts as both a source of near infrared radiation and a detector of reflected diffuse internal energy from the gem. Alternatively, the integrating sphere or integrating cylinder is replaced with a reflective fluid which surrounds the gem and causes total internal reflection.
Abstract:
The present invention relates to a device for the detection of a fluorescent dye in a sample, comprising a radiation source means with the aid of which light for exciting the fluorescent dye to be detected can be transmitted into the sample applied to a carrier, and a detecting means for detecting fluorescent light which has been emitted by the fluorescent dye to be detected. The present invention is characterized by a hollow space having an internal high-reflectance surface, a first aperture directed towards the sample, and a second aperture located opposite the detecting means.
Abstract:
The invention is directed to a method for non-destructive determination of the refractive index of un-pigmented or transparently pigmented coatings or of binder systems comprising the following steps: A) application of a transparent layer of an un-pigmented or transparently pigmented coating or an un-pigmented binder system onto a darkly pigmented substrate; B) optional drying and/or curing of the coating obtained; C) acquisition of the reflection spectrum of the coating obtained with a spectrophotometer with d/8° measurement geometry with the specular component included and with the specular component excluded; D) determination of the differential spectrum between the reflection spectrum with the specular component included and reflection spectrum with the specular component excluded; and E) determination of the refractive index of the coating or binder system with the assistance of the differential spectrum obtained in D) by making use of a previously determined relationship between the difference in the reflection spectrum with the specular component included and the reflection spectrum with the specular component excluded of the coating or binder system and the refractive index of the corresponding coating or binder system.
Abstract:
A method of verifying the color and tinting strength of a manufactured batch of a semi-transparent wood stain. In accordance with the method, a standard batch of the wood stain is formed and then mixed with a specified amount of a white colorant to form a standard measurement batch. A test sample of the manufactured batch is obtained and is also mixed with a specified amount of the white colorant to form a test measurement sample. Layers of the standard measurement batch and the test measurement sample are formed on the substrates and complete hide obtained. Reflectance measurements of the layers are made using a spectrophotometer. The reflectance measurements are used to determine if the color and the tinting strength of the manufactured batch is within an acceptable deviation range of the color and tinting strength of the standard batch. This allows for objective color difference and tint strength difference calculations, and adjustments can be made therefrom, therefore eliminating the past visual trial and error methods.
Abstract:
An individualized modeling equation for predicting a patient's blood glucose values is generated as a function of non-invasive spectral scans of a body part and an analysis of blood samples from the patient, and is stored on a central computer. The central computer predicts a blood glucose value for the patient as a function of the individualized modeling equation and a non-invasive spectral scan generated by a remote spectral device. If the spectral scan falls within the range of the modeling equation, the predicted blood glucose level is output to the patient. If the spectral scan falls outside the range of the modeling equation, regeneration of the model is required, and the patient takes a number of noninvasive scans and an invasive blood glucose level determination. The computer regenerates the individualized modeling equation as a function of the set of spectral scans and corresponding blood glucose values.
Abstract:
A curved mirrored surface is used to collect radiation scattered by a sample surface and originating from a normal illumination beam and an oblique illumination beam. The collected radiation is focused to a detector. Scattered radiation originating from the normal and oblique illumination beams may be distinguished by employing radiation at two different wavelengths, by intentionally introducing an offset between the spots illuminated by the two beams or by switching the normal and oblique illumination beams on and off alternately. Beam position error caused by change in sample height may be corrected by detecting specular reflection of an oblique illumination beam and changing the direction of illumination in response thereto. Butterfly-shaped spatial filters may be used in conjunction with curved mirror radiation collectors to restrict detection to certain azimuthal angles.
Abstract:
The present invention provides an apparatus for measurement of Raman scattered radiation comprising. The apparatus comprises at least one source of electromagnetic radiation for producing an electromagnetic radiation beam characterized by a narrow spectral width, an integrating cavity having an interior and an exterior, wherein a sample is placed in said interior. The integrating cavity further having at least one port for insertion of the sample in the interior and for transmission of the electromagnetic radiation into and out from the interior, the at least one port extending from the exterior to said interior of said integrating cavity. The integrating cavity also comprises a first optical element for transmitting the electromagnetic radiation into the interior of the integrating cavity through the at least one port, and a second optical element for collecting Raman scattered electromagnetic radiation from the sample through the at least one port. The apparatus also comprises a spectrum analyzer for determining spectral composition of the Raman scattered electromagnetic radiation, a detector for measuring the Raman scattered electromagnetic radiation; and a system for determining concentration of at least one chemical compound from the measured Raman scattered electromagnetic radiation. The apparatus may also comprise a radiation expanding element. A method for measuring the concentration of one or more chemical compounds in a sample using Raman scattering is also provided.
Abstract:
An automatic color-tone test device comprises: a measurement cell 4 to which there are communication-connected dye liquor introduction tubes 16, 18 for passing through a controlling dye liquor that is a measurement object and dye liquor discharge tubes 17, 19; a spectrophotometer adapted such that a light transmission distance in the measurement cell 4 can be variably set in compliance with a concentration level of the controlling dye liquor that is a measurement object; and a statistical test computer section for operation-judging whether or not concentration and hue agree with desired values.