Matches 1 - 50 out of 68 1 2 >


Match Document Document Title
US20120170019 DETECTION OF CHEMICAL VAPOR DEPOSITION GROWN DIAMOND  
Diamonds may be identified as grown by the use of chemical vapor deposition. One or more diamonds may be placed on a surface and exposed to short wavelength light. Diamonds that fluoresce red may...
US20130184445 METHOD FOR OBSERVING PROTEIN CRYSTAL  
Provided are a method for observing protein crystal, wherein the growth process of the protein crystals is nondestructively and three-dimensionally monitored on a real-time basis and the growth of...
US20090182520 ASSESSMENT OF DIAMOND COLOR  
Disclosed are methods and devices for assessing the colors of diamonds. In embodiments, the color of finished diamonds cut from a given rough diamond is assessed by analyzing the effect on light...
US20110205525 ARRANGEMENT FOR AND METHOD OF HOLDING GEMSTONES  
A gemstone to be optically examined is held by a holder having an internal compartment. A mounting plate supports the gemstone table-side up in an upright position within the internal compartment....
US20120268728 GEM POSITIONING AND ANALYSIS SYSTEM  
A gemstone positioning and analysis system is disclosed for measuring various characteristics of a gemstone. The system includes a narrow band spectrophotometer that allows the authenticity of the...
US20120242977 RETAIL COMPATIBLE DETECTION OF CVD GROWN DIAMOND  
A system includes a radiation source to provide short wavelength light. A holder positions a table of a gemstone to receive the light. A detector is positioned to receive fluorescent light from...
US20150219567 GEMSTONE TESTER AND A METHOD OF CHARACTERISING A GEMSTONE  
A gemstone tester for characterising a gemstone and a method of characterising a gemstone are provided, the gemstone tester comprising a detector unit for detecting one or more transmittances of...
US20100055022 DIAMOND IDENTIFIER  
Diamonds are embedded with one or more layers representative of an identifier. The identifier may include encoding in the form of defects created in one or more layers in a recognizable pattern,...
US20150226723 METHOD OF INSPECTING SAPPHIRE STRUCTURES AND METHOD OF FORMING THE SAME  
A method of inspecting and forming sapphire structures. The method of inspecting a sapphire structure may include may include providing an annealed sapphire structure, and measuring a profile of...
US20090248591 GLOBAL INVESTMENT GRADE FOR NATURAL AND SYNTHETIC GEMS USED IN FINANCIAL INVESTMENTS AND COMMERCIAL TRADING AND METHOD OF CREATING STANDARDIZED BASKETS OF GEMS TO BE USED IN FINANCIAL AND COMMERCIAL PRODUCTS  
A process to create a fungible global standard for diamonds and gemstones. The process involves grouping diamonds in an investment standard according to their gemological, proportional, optical...
US20100053597 DETECTION OF CHEMICAL VAPOR DEPOSITION GROWN DIAMOND  
Diamonds may be identified as grown by the use of chemical vapor deposition. One or more diamonds may be placed on a surface and exposed to short wavelength light. Diamonds that fluoresce red may...
US20100026985 RETAIL COMPATIBLE DETECTION OF CVD GROWN DIAMOND  
A system includes a radiation source to provide short wavelength light. A holder positions a table of a gemstone to receive the light. A detector is positioned to receive fluorescent light from...
US20140063485 GEMSTONE REGISTRATION SYSTEM AND SYSTEM FOR EVALUATING THE QUALITY OF A GEMSTONE CUT  
A computer-implemented system is provided and includes a processor and a memory accessible by the processor, with the system being configured to measure light performance properties of a gemstone...
US20110228063 GEMSTONE VIEWER  
An apparatus for viewing images of a gemstone is described. The apparatus comprises a support structure for supporting the gemstone at an observation position. An illumination structure comprises...
US20150022801 COMPUTER-IMPLEMENTED METHOD OF AND SYSTEM FOR TEACHING AN UNTRAINED OBSERVER TO EVALUATE A GEMSTONE  
A computer-implemented method teaches a user to evaluate a gemstone, such as a cut diamond. The method includes providing a computer system connected to an apparatus capable of capturing an image...
US20130321792 UNIVERSAL TOOL FOR AUTOMATED GEM AND MINERAL IDENTIFICATION AND MEASUREMENT  
A tool employs Raman spectroscopy, optical imaging, physical measurements, smart software applications, and custom databases for automated on-site gem and mineral identification, measurement, and...
US20110299063 Device For Measuring Properties Of Scatterers , For Color Measuring For Scattered Light Of Gemstones, For Measuring Brightness Of Gemstones, And For Measuring Luminescence Distribution  
A device for measuring properties of scatterers which measures properties of a scatterer from a stereoscopic scattering distribution of the scatterer upon receiving an electromagnetic wave with a...
US20060232764 Method and system for prediction the color of gemstones  
Predicting a first color of a gemstone to be cut to have a first geometry, from an uncut gemstone having a second color and a second geometry, is performed by means of a system comprising...
US20090290141 Matched pairs of gemstones  
A system is provided for certifying two or more gemstones as being a matched pair. The system includes measuring values for at least four physical properties of a multiplicity of gemstones,...
US20090147241 Method for evaluation of a gemstone  
A method of determining the position of inclusions in a gemstone, comprising: (a) placing the gemstone within a material having a refractive index within 0.5, optionally 0.2 or 0. 1, of that of...
US20050117145 Detection of imperfections in precious stones  
A system for the inspection of a precious stone, including an energy transfer system for changing the temperature of the stone, at least one imaging device imaging the stone and outputting a...
US20110206234 ARRANGEMENT FOR AND METHOD OF EXAMINING GEMSTONES  
An arrangement for, and a method of, accurately determining at least one optical property, such as coverage and/or symmetry, of a gemstone, employ an energizable, stationary light source for...
US20150233839 REFLECTANCE SPECTROSCOPY MEASURING AND SAMPLING SYSTEM AND METHOD FOR GEMSTONE TESTING  
A reflectance spectroscopy measuring and sampling system for gemstone testing is disclosed. The system includes a first light source (1), a second light source (2), a light filtering element, an...
US20080225266 GEMSTONE VIEWING METHODS AND APPARATUS  
A viewing apparatus for viewing a surface of a gemstone comprising an adjustable platform with a surface adapted to receive the gemstone is disclosed. The apparatus includes a viewing axis along...
US20100220310 Fast UV-VIS-NIR absorption spectrometer system and method  
A method and system for evaluating a colored gem stone which has been cooled to below a designated temperature are provided. The system includes a cooling unit configured to support and cool a gem...
US20090153835 Systems and Methods for the Evaluation of Scintillation in Gemstones  
Systems and methods, for the evaluation, grading, and presentation of evaluation results, of the scintillation of gemstones, such as diamonds. Specifically, there are discussed systems and methods...
US20060092402 Laser crystal evaluating system  
A laser crystal evaluating system, comprising a light emitting source for emitting an excitation light, a laser crystal support base for supporting a laser crystal, a photodetection unit for...
US20100141929 APPARATUS AND METHOD FOR COLOR MEASUREMENT AND COLOR GRADING OF DIAMONDS, GEMSTONES, AND THE LIKE  
The present invention discloses method for color measurement and color grading of faceted gemstones, diamonds and the like. A novel three-step calibration insures an accurate spectral measurement...
US20100090164 INDIUM ARSENIDE NANOCRYSTALS AND METHODS OF MAKING THE SAME  
The present invention provides high quality monodisperse or substantially monodisperse InAs nanocrystals in the as-prepared state. In some embodiments, the as-prepared substantially monodisperse...
US20130038859 REFLECTED DARK FIELD METHOD AND APPARATUS  
A reflected dark field structure includes a bottom plate, a support tube, a light unit, a diffuser structure, and a reflector unit that provides reflected dark field illumination, such that a gem...
US20130038713 REFLECTED DARK FIELD METHOD AND APPARATUS  
A reflected dark field structure includes a bottom plate, a support tube, a light unit, a diffuser structure, and a reflector unit that provides reflected dark field illumination, such that a gem...
US20080123076 Systems and Methods for Ray Tracing  
Systems and methods for evaluating an optical property of a gemstone operate to trace selected and ordered model light rays through a model of the gemstone. The rays may be selected such that,...
US20130010280 GEMSTONE REGISTRATION SYSTEM  
A device for producing a reproducible identification pattern of a polished gemstone includes light directing means for directing a focused beam of light onto a gemstone orientated in a particular...
US20150253255 ENGRAVED GEMSTONE VIEWER FOR PERSONAL COMMUNICATIONS DEVICES  
A gemstone viewer for personal communications devices for viewing a gemstone surface on which has been formed an image or inscription such as an identification number. In one embodiment, the...
US20080070989 Method of Evaluating Evenness of Suplatast Tosilate Crystal, Even Crystal, and Process for Producing the Same  
Provided are a method for evaluating evenness of suplatast tosilate crystals; stable suplatast tosilate crystals exhibiting evenness in optical purity; and a method for producing the suplatast...
US20100053596 Crystallographic orientation measurement  
A method is disclosed for measuring the crystallographic orientation of a component cast by a directional solidification process. The method comprises the steps of: illuminating at least a region...
US20100128267 AUTOMATIC BREWSTER ANGLE REFRACTOMETER  
An improved refractometer for automatically determining the refractive index of a test subject by using principles embodied in Brewster's Angle, the refractometer comprising a light source, a...
US20100128253 METHOD FOR DETECTING THE DIAMETER OF A SINGLE CRYSTAL AND SINGLE CRYSTAL PULLING APPARATUS  
The invention is a method for detecting the diameter of a single crystal grown by the Czochralski method, wherein the diameter of a single crystal is detected by both a camera and a load cell, the...
US20100111354 APPARATUS AND METHODS FOR ASSESSMENT, EVALUATION AND GRADING OF GEMSTONES  
An apparatus (10) for assessment, evaluation and grading of gemstones has a stage (11) upon which a gemstone may be supported, the stage being enclosed in a housing (15) that is impervious to...
US20140253906 Imaging System  
An imaging system may be collect information related to a specific gemstone such that a user may later access those images in a manner that allows the user to emulate a microscope. The...
US20130329212 Imaging System  
An imaging system may be collect information related to a specific gemstone such that a user may later access those images in a manner that allows the user to emulate a microscope. The...
US20150109606 PLASMONIC PHOTOTRANSISTOR  
A plasmonic phototransistor includes a photon to surface-plasmon-polariton (SPP) transducer including and an optical coupling structure configured to receive incident light and an electrically...
US20090051897 Method and Apparatus for Identifying and Characterizing Objects based on Fluorescence  
A method and apparatus for characterizing objects. The method includes the steps of illuminating the object with incident red light having at least some wavelengths between 620 nms and 650 nms and...
US20100220311 Method and apparatus for rapidly cooling a gem, including two stage cooling  
A cooling apparatus includes a container configured to contain a coolant within a space. The apparatus further includes a cooling block positioned substantially within the space and having a high...
US20140104595 DEVICE FOR MEASURING PROPERTIES OF SCATTERERS  
An apparatus for measuring properties of scatterers includes: a paraboloidal mirror or a paraboloidal screen; a specimen platform configured to support the scatterer on a focal point of the...
US20130057848 IMAGING CRYSTALLINE DOMAINS OF SMALL MOLECULES  
An apparatus and method for performing volume scanning of a sample comprised of chiral materials disposed in a matrix of non-chiral materials is disclosed. A laser is raster scanned in a plane of...
US20080225265 METHOD AND APPARATUS FOR FINDING MACROMOLECULE CRYSTALLIZATION CONDITIONS  
A system and method for determining macromolecule crystallization conditions by measuring the polarization anisotropy of a fluorescent probe attached to the macromolecule in solution as a function...
US20170176341 Portable Small-Object Holding Device and a Method for Using Same  
A portable small-object holding device, comprising: a housing, movable gripper jaws configured to grip and hold a small object; at least one hinge and at least one cog-wheel configured to enable...
US20170074806 DEVICE FOR EVALUATING CRYSTALLINITY AND METHOD OF EVALUATING CRYSTALLINITY  
A device for evaluating crystallinity includes a substrate holder configured to fix a polycrystalline silicon substrate thereon, a light source disposed below the substrate holder, a circular...
US20170023487 LIGHT COLLECTION FROM DNV SENSORS  
Methods and configurations are disclosed for an efficient collection of fluorescence emitted by the nitrogen vacancies of a diamond of a DNV sensor. Some implementations may include a diamond...

Matches 1 - 50 out of 68 1 2 >