Abstract:
A system is described for obtaining images of a gemstone, and performing quantitative analysis on the images to obtain measures of properties of the gemstone. The system comprises a support structure for supporting the gemstone at an observation position. An illumination structure is arranged to illuminate the gemstone. The illumination structure comprises a plurality of radially dispersed directional light sources directed towards the observation position, the support structure and illumination system being rotatable relative to one another around a rotation axis so that the gemstone can be illuminated by one or more of the directional light sources at each of a plurality of rotational positions, the axis of rotation being normal to a selected facet of the gemstone. An imaging device is directed towards the gemstone for obtaining images of the gemstone at each of the rotational positions, the imaging device having an imaging axis parallel to or coincident with the axis of rotation. An image processor is provided for identifying sparkle regions in the images corresponding to reflections from individual light sources by individual facets and providing a quantitative measure of the gemstone on the basis of properties of the sparkle regions.
Abstract:
A system is described for obtaining images of a gemstone, and performing quantitative analysis on the images to obtain measures of properties of the gemstone. The system comprises a support structure for supporting the gemstone at an observation position. An illumination structure is arranged to illuminate the gemstone. The illumination structure comprises a plurality of radially dispersed directional light sources directed towards the observation position, the support structure and illumination system being rotatable relative to one another around a rotation axis so that the gemstone can be illuminated by one or more of the directional light sources at each of a plurality of rotational positions, the axis of rotation being normal to a selected facet of the gemstone. An imaging device is directed towards the gemstone for obtaining images of the gemstone at each of the rotational positions, the imaging device having an imaging axis parallel to or coincident with the axis of rotation. An image processor is provided for identifying sparkle regions in the images corresponding to reflections from individual light sources by individual facets and providing a quantitative measure of the gemstone on the basis of porperties of the sparkle regions.
Abstract:
A device for making accurate, reproducible light reflectance measurements on an optically nonuniform specimen comprises means for holding the specimen in a fixed position. In one embodiment the specimen is illuminated by light sources that are arranged at acute angles relative to the specimen and (360.degree./N.+-.1.degree.) apart in azimuth, where N=the total number of light sources. The light sources are sequentially energized and deenergized to illuminate the specimen. A light detector receives light reflecting from the surface and generates an electrical signal, which is subsequently processed. In another embodiment the light sources are arranged in pairs in which the two light sources in a pair are simultaneously energized and deenergized and the pairs are sequentially energized and deenergized. A method for measuring reflected light is also provided. The device and method are useful for making biochemical assays with reagent test strips by measuring the tone of coloration of the strips after treatment with a target substance being examined.
Abstract:
Ein Gasanalysator zur Messung von zwei Gaskomponenten eines Messgases (7) weist zwei Leuchtdioden (1, 2), einen Strahlteiler (3), eine von dem Messgas (7) durchströmbare Messkammer (5), einen Messdetektor (6), einen Referenzdetektor (4) und eine Steuer- und Auswerteeinrichtung (8) zum abwechselnden Ansteuern der Leuchtdioden (1, 2) und zur Auswertung der von dem Messdetektor (6) und dem Referenzdetektor (4) gelieferten Signale zu Messergebnissen (9) für die beiden Gaskomponenten auf. Der Strahlteiler (3) ist in einem quaderförmigen Metallblock (14) angeordnet. Die Messkammer (5) ist als langgestreckter beidseitig offener Hohlkörper (21) aus Metall ausgebildet. Der Messdetektor (6) ist an einem Detektorblock (28) aus Metall gehalten. Der quaderförmige Metallblock (14) und der Detektorblock (28) sind über Zugstäbe (34) miteinander verbunden, wobei die Messkammer (5) zwischen ihnen eingespannt ist.
Abstract:
Ein Laser-Multisensorsystem (1) zur selektiven Spurenanalyse organischer Stoffe, wobei das Multisensorsystem zumindest ein Laser-Ionen-Mobilitätsspektrometer (2), ein Absorptionsspektrometer (3) und eine Fluoreszenz-Messeinrichtung (4) aufweist, ist dadurch gekennzeichnet, dass eine Vorrichtung (8) zum simultanen Erzeugen eines gemeinsamen Laserstrahls (14) mit unterschiedlichen Wellenlängen und Pulsen zum gleichzeitigen Betrieb des Laser-Ionen-Mobilitätsspektrometers (2), des Absorptionsspektrometers (3) und der Fluoreszenz-Messeinrichtung (4) vorgesehen ist. Hierdurch werden die Nachteile der bekannten Lösungen des Standes der Technik vermieden und es wird eine verbesserte Lösung zur hochempfindlichen und hochselektiven Spurenanalyse von organischen Stoffen, insbesondere Gefahrstoffen wie Explosiv- und Kampfstoffen in der Luft zur Verfügung gestellt.
Abstract:
A curved substrate bubble detection method includes: providing, by a first light source and a second light source, parallel light incident to a to-be-tested substrate in different incident directions; obtaining, by a linear array camera, a first image including image information of a first side edge of the to-be-tested substrate; determining location information of a defect region of the to-be-tested substrate according to the first image, and generating a second image including image information of the defect region; binarizing the second image, and determining that the to-be-tested substrate has a bubble defect if there are at least two bright spots in an obtained binarized image, and a distance between any two first bright spots of at least two first bright spots is less than a first preset value. A curved substrate bubble detection system is also disclosed.
Abstract:
An inspection system having a light source, a mirror sensor, and an image sensor. The mirror assembly is aligned with the camera; the light is reflected from the container to the camera, and the camera creates multiple images of the container at a viewing angle. The multiple images are analyzed to detect defects.
Abstract:
The present invention relates to a method and an automatic analyzer for determining more accurately the concentration of lipids and other interfering substances in body fluids, particularly of interfering substances such as bilirubin and hemoglobin in blood serum and blood plasma samples.
Abstract:
Optical and chemical analytical systems and methods are provided herein. In one embodiment, a method includes exposing a mixture sample to electromagnetic radiation, the mixture sample including analytes, detecting responsiveness of one or more of the analytes to the electromagnetic radiation, calculating average responsiveness of the one or more of the analytes, and calculating a concentration of the one or more of the analytes in the mixture sample using the average responsiveness.
Abstract:
Novel systems and methods for performing treatment (e.g., coloration) of keratinous fibers are disclosed. The methods and systems utilize one or more of a dispensing device which is configured to provide customized composition for treating keratinous fibers (e.g., a coloring composition), optionally formed from tablets; an optical reader, for obtaining sufficient characteristics of the keratinous fibers to make a realistic prediction of the outcome of a treatment (e.g., coloring treatment); a computational units for predicting an outcome of a treatment, optionally being interfaced with the dispensing device and for selecting a customized treatment; and tablet formulations which are useful in preparing customized composition for treating keratinous fibers. Further disclosed are rapidly disintegrating tablets for use in the preparation of compositions for treating keratinous fibers.