Abstract:
An apparatus and method for utilizing NIR spectrography for measuring major constituents of substances in real time includes a monochromator (38) or other sensor having no moving optical parts. At least one of the monochromator (38) and the substance are moving relative to one another. An NIR radiation source (44) irradiates a substance (51) and the reflected or passed-through radiation is transmitted to the monochromator (38), which isolates and detects narrow portions of the received spectrum. By analyzing the intensities and wavelengths of the received radiation, the presence and amount of major constituents of the substance can be determined.
Abstract:
A spectrophotometer, used for measuring a two-dimensional area or a spot area in a rather broad surface of a sample, is provided with a camera (31) for taking a picture of the sample surface. The picture is shown on a display screen (33), and an operator can move a window superimposed on the sample picture on the display screen by using a mouse (34) or the like to a desired place on the sample surface. A sample stage (1) on which the sample (2) is mounted moves according to the movement of the mouse (34), whereby a spectrophotometric measurement of the desired place (two-dimensional area or spot area) on the sample is facilitated.
Abstract:
A color detecting apparatus comprises a mechanism (20) for decomposing light from an inspection target object into a plurality of kinds of wavelength components and for inputting the wavelength components as spectrum data, a memory (24) for storing the spectrum data, a mechanism (25) for calculating out a physical characteristic amount of the spectrum data, a memory (13) for storing reference data to be used as reference for the characteristic amount, and a mechanism (11, 14) for comparing the characteristic amount with the reference data, thereby to determine whether or not a color of the inspection target object is a reference color.
Abstract:
A colorimeter provides compensation for changes in the color signature of an object due to lamp aging. A current measuring circuit (95) measures current to the lamp (29) during an initial training of the colorimeter and stores a value I T indicative of the lamp current at training. When an object (5) is scanned by the colorimeter, lamp current is again sensed and assigned a value I S . Comparison between a sensed color signature and a stored color signature then occurs. Compensation is accomplished by modifying one of the two signatures by a ratio including I S and I T power.
Abstract:
Es wird ein Verfahren und eine Vorrichtung zur Erstellung von Farbrezepten zur Nachstellung der Farbe einer Vorlage (6) beschrieben. Dabei wird bereits bei der Messung der Glanzanteil des reflektierten Lichtes durch Polarisationsfilter (5,7) unterdrückt, so dass die Berechnung der gesuchten Farbmittelkonzentration (i) unabhängig von der Beschaffenheit der Oberfläche der nachzustellenden Vorlage (6) (glänzend, halbglänzend, matt) mit einem Satz oberflächenbeschaffenheitsunabhängiger optischer Daten (K i , S i ) der Farbmittel (i) erfolgen kann.
Abstract:
A measurement apparatus comprises: a light emitting means for emitting a light; a light receiving means for receiving a reflected light from a measurement target, the light receiving means comprises a plurality of light-receiving elements; a detection means for detecting a temperature of the light emitting means; a determination means for determining a correspondence between each light-receiving element of the light receiving means and a wavelength of the reflected light from the measurement target based on a result of receiving the reflected light from a reference element and the temperature of the light emitting means detected by the detection means; and an output means for outputting spectral reflectance information for the measurement target based on a result of receiving the reflected light from the measurement target and the correspondence determined by the determination means.
Abstract:
This specification describes various embodiments that relate to methods for providing a wideband colorimeter that can include more accurate outputs. In one embodiment, a narrowband instrument, such as a spectrometer or spectrograph, can be used for calibration of a wideband colorimeter, so that more accurate outputs can be provided. In one embodiment, an optical test equipment, which consists of both a wideband colorimeter and a narrowband spectrograph, can be used for providing a more accurately calibrated wideband colorimeter. As an example, a spectra-camera, which is a hybrid system consisting of both a wideband colorimeter and a narrowband spectrograph, can be used for simultaneous testing by both the wideband colorimeter and the narrowband spectrograph. By doing simultaneous testing, accurate calibration of the wideband colorimeter can be achieved. This specification further describes a mathematical model to characterize a wideband three channel colorimeter with a narrowband multiple channel spectrometer.
Abstract:
A holographic polymer dispersed liquid crystal (HPDLC) tunable filter exhibits switching times of no more than 20 microseconds. The HPDLC tunable filter can be utilized in a variety of applications. An HPDLC tunable filter stack can be utilized in a hyperspectral imaging system capable of spectrally multiplexing hyperspectral imaging data acquired while the hyperspectral imaging system is airborne. HPDLC tunable filter stacks can be utilized in high speed switchable optical shielding systems, for example as a coating for a visor or an aircraft canopy. These HPDLC tunable filter stacks can be fabricated using a spin coating apparatus and associated fabrication methods.
Abstract:
Ein Bildaufnehmer für die digitale Aufnahme eines zweidimensionalen Farbbildes weist mehrere lichtempfindliche Sensorpixel (26) und mehrere nebeneinander angeordnete Farbteiler-Elementen (24) auf, wobei jedem Farbteiler-Element (24) mindestens zwei Sensorpixel (26) zugeordnet sind. Ferner ist jedes Farbteiler-Element (24) derart ausgebildet, dass es darauf auftreffendes polychromatisches Licht (34) auf die ihm zugeordneten Sensorpixel (26) mit einem Aufteilungsverhältnis verteilt, das von der spektralen Zusammensetzung des auftreffenden Lichts abhängt. Erfindungsgemäß sind die Farbteiler-Elemente (24) in einem zweidimensionalen Muster angeordnet.