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| Number | Title | Issue Date |
| 8134695 | Glass container stress measurement using fluorescence An apparatus and method for measurement of the stress in and thickness of the walls of glass containers is disclosed that uses fluorescence to quickly and accurately ascertain both the thickness of the stress layers and the wall thickness in addition to the stress c... | 03/13/2012 |
| 8094293 | Glass thickness measurement using fluorescence An apparatus and method for measurement of the stress in and thickness of flat glass or curved glass segments is disclosed that uses fluorescence to quickly and accurately ascertain both the thickness of the stress layers and the wall thickness in addition to the st... | 01/10/2012 |
| 8049871 | Glass stress measurement using fluorescence An apparatus and method for measurement of the stress in and thickness of flat glass or curved glass segments is disclosed that uses fluorescence to quickly and accurately ascertain both the thickness of the stress layers and the wall thickness in addition to the st... | 11/01/2011 |
| 7903238 | Combination of ellipsometry and optical stress generation and detection A method includes selecting one of performing ellipsometry or performing optical stress generation and detection. The method also includes, in response to selecting performing ellipsometry, applying at least one first control signal to a controllable retarder that m... | 03/08/2011 |
| 7859653 | Detecting strain in birefringent materials using spectral polarimetry A method, computer program product and system for analyzing multispectral images from a plurality of regions of birefringent material, such as a polymer film, using polarized light and a corresponding polar analyzer to identify differential strain in the birefringen... | 12/28/2010 |
| 7639348 | Stress measuring method and instrument The stress of a sample semiconductor wafer is detected with high accuracy in the form of an absolute value without rotating the sample or the entire optical system. A laser light R is subjected to photoelastic modulation in a PEM 6 to generate a birefringence... | 12/29/2009 |
| 7369221 | Portable refractometer A portable refractometer is provided that includes a lens barrel having a lens barrel axis. A prism is secured to one end of the lens barrel, the prism having an entry face that provides a boundary surface between the prism and a substance to be measured. A tube sha... | 05/06/2008 |
| 7359586 | Fiber optic strain sensor and associated data acquisition system A fiber optic polarimetric strain sensor and associated data acquisition system capable of all-optical measurements of physical parameters, such as structural strain, gas and liquid pressure, acceleration and vibration, gas and liquid flow rate, and force without fi... | 04/15/2008 |
| 7349094 | Laser radar apparatus having multiple output wavelengths A coherent laser radar (lidar) device is described. The device has a transmitter portion that comprises a single wavelength laser source, a conversion means (such as an electro-optic modulator) for producing a combined light beam that comprises at least two componen... | 03/25/2008 |
| 7336361 | Spectroscopic ellipsometer and polarimeter systems A spectroscopic ellipsometer or polarimeter system having a source of a polychromatic beam of electromagnetic radiation, a polarizer, a stage for supporting a material system, an analyzer, a dispersive optics and a detector system which comprises a multiplicity of d... | 02/26/2008 |
| 7322250 | System and method for sensing torque on a rotating shaft A system and method relating to the measuring of torque in a rotating shaft is provided. An optical torque sensing system comprises a rotating shaft, wherein a sleeve of photo-elastic material overlays a portion of the shaft. A light emitting component delivers ligh... | 01/29/2008 |
| 7317517 | Birefringence profiler A waveguide under test can be exposed to a light signal whose polarization rotates between the vertical and horizontal polarizations. The intensity detected at a photodetector can be separated into AC and DC components. The AC components may be utilized to derive a ... | 01/08/2008 |
| 7304737 | Rotating or rotatable compensator system providing aberation corrected electromagnetic raadiation to a spot on a sample at multiple angles of a incidence Spectroscopic ellipsometer systems which include polarizer and analyzer elements which remain fixed in position during data acquisition while at least one continuously rotating or step-wise rotatable compensator imposes a continuously variable or plurality of sequen... | 12/04/2007 |
| 7301632 | Polarization state conversion in optically active spectroscopy The invention describes a method to eliminate instrumental offset in measurement of optically active scattering and circular dichroism. The method uses the time-average measurement of the light that is systematically transformed by a series of optical devices. The o... | 11/27/2007 |
| 7280199 | System for detecting anomalies and/or features of a surface A cylindrical mirror or lens is used to focus an input collimated beam of light onto a line on the surface to be inspected, where the line is substantially in the plane of incidence of the focused beam. An image of the beam is projected onto an array of charge-coupl... | 10/09/2007 |
| 7277171 | Flying mobile on-board ellipsometer, polarimeter, reflectometer and the like systems A substantially self-contained “on-board” material system investigation system functionally mounted on a three dimensional locational system to enable positioning at desired locations on, and distances from, the surface of a large sample, including the capabilit... | 10/02/2007 |
| 7274440 | Systems and methods for measuring stress in a specimen Systems and methods for measuring stress in a specimen are provided. One system includes an optical subsystem configured to measure stress-induced birefringence in patterned structures formed on the specimen. In some embodiments, the optical subsystem may be configu... | 09/25/2007 |
| 7253896 | Filter A filter for use in a spectrometer to filter transmitted radiation and wherein the filter has a birefringent element responsive to an applied signal, a first polarizer for polarizing the radiation transmitted by a sample, a second polarizer for polarizing the radiat... | 08/07/2007 |
| 7253900 | Ellipsometer or polarimeter and the like system with multiple detector element detector in environmental control chamber including secure sample access A spectrophotometer, ellipsometer or polarimeter or the like system with a spectroscopic source of wavelengths and a detector with multiple detector elements for simultaneous monitoring of a number of wavelengths in an environmental control chamber which optionally ... | 08/07/2007 |
| 7245376 | Combined spatial filter and relay systems in rotating compensator ellipsometer/polarimeter Low aberration relay systems modified to perform as spatial filters in rotating compensator ellipsometer, polarimeter and the like systems. ... | 07/17/2007 |
| 7236241 | Method of making a standard tool for calibrating stress analysis measuring devices and a set of the standard tools A method of making a standard tool for calibrating polarimeters that analyze stress in photoelastic material, includes the steps of partially annealing a starting piece of tempered glass so that the starting piece has a retardance below 250 nm/cm, removing a periphe... | 06/26/2007 |
| 7197931 | Sensors for monitoring structural health conditions Sensors and systems for monitoring structural health conditions. The present invention provides a device for monitoring structural health conditions including a dielectric substrate, a piezoelectric device for actuating and/or sensing Lamb waves, a molding layer dep... | 04/03/2007 |
| 7172983 | SiO-TiOglass body with improved resistance to radiation The invention discloses an SiO2—TiO2 glass, which is preferably made by flame-hydrolysis and which distinguishes itself by increased resistance to radiation, especially in connection with EUV lithography. By purposefully reducing the hydrogen... | 02/06/2007 |
| 7155936 | Doped silica glass articles and methods of forming doped silica glass boules and articles The present invention provides doped titania-doped silica glass articles having low thermal expansions and low variations in thermal expansion. According to one embodiment of the invention, a titania-doped silica glass article has a titania content of between about ... | 01/02/2007 |
| 7158231 | Spectroscopic ellipsometer and polarimeter systems A spectroscopic ellipsometer or polarimeter system having a source of a polychromatic beam of electromagnetic radiation, a polarizer, a stage for supporting a material system, an analyzer, a dispersive optics and a detector system which comprises a multiplicity of d... | 01/02/2007 |
| 7106508 | Hybrid cell The present invention is a hybrid cell that utilizes a PBS pair in conjunction with a wedge tuner and a crystal to achieve a more stable interleaver. A first PBS splits an incoming optical signal into two orthogonally polarized beams which follow different optical p... | 09/12/2006 |
| 7092159 | Polarization recovery system for projection displays A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD imager. The compact polarization recovery waveguide system generally in... | 08/15/2006 |
| 7053017 | Reduced striae extreme ultraviolet elements Titania-containing silica glass bodies and extreme ultraviolet elements having low levels of striae are disclosed. Methods and apparatus for manufacturing and measuring striae in glass elements and extreme ultraviolet elements are also disclosed. ... | 05/30/2006 |
| 7042826 | Optical pick-up apparatus achieving high numerical aperture, optical converging system therefor, and recording and/or reproducing method utilizing them An optical pickup apparatus for recording and/or reproducing information for an optical information recording medium having a plurality of information recording layers, comprising: a light source to emit a light flux; and a converging optical system to converge the ... | 05/09/2006 |
| 7027224 | Wave plate mounting A compact mounting for a wave plate permits convenient rotational adjustment of the wave plate through an angle of at least one-half revolution to exploit asymmetry in the optical characteristics of the wave plate. ... | 04/11/2006 |
| 7006288 | Polarization recovery system for projection displays A light guide comprising three guide sections and a light coupling element between the light guide sections. The light coupling element having an internal polarizing surface for reflecting light of a predetermined polarization state. Each light guide section has an ... | 02/28/2006 |
| 6999237 | Method and apparatus for configuration and assembly of a video projection light management system A pathlength matched prism assembly is constructed from Polarizing Beam Splitter optical components having varying degrees of precision by arranging them in pathlength matched positions and fixing them to a baseplate or frame. Gaps between the optical components are... | 02/14/2006 |
| 6975397 | Polarization state conversion in optically active spectroscopy The invention describes a method to eliminate instrumental offset in measurement of optically active scattering and circular dichroism. The method uses the time-average measurement of the light that is systematically transformed by a series of optical devices. The o... | 12/13/2005 |
| 6969177 | Polarization recovery system using redirection A polarization recovery system includes a polarizing beam splitter transmitting light of a useful polarization in an output direction and reflecting light of a non-useful polarization in a first orthogonal direction substantially orthogonal to the output direction. ... | 11/29/2005 |
| 6936471 | Instrument for high throughput measurement of material physical properties and method of using same An apparatus and method for screening combinatorial libraries of materials by measuring the response of individual library members to mechanical perturbations is described. The apparatus generally includes a sample holder for containing the library members, an array... | 08/30/2005 |
| 6927853 | Method and arrangement for optical stress analysis of solids A method for optical stress analysis comprises the steps of directing an incident beam of polarized light to the sample to be analyzed and analyzing a light bundle exiting the sample in two detection channels extending perpendicular to one another with respect to th... | 08/09/2005 |
| 6917426 | Real-time wavefront sensor system The system includes a first polarizing element; an electro-optically driven birefringent element; a second polarizing element; an optical assembly; and, an optical-to-electronic imaging sensor assembly. The first polarizing element receives an incoming optical wavef... | 07/12/2005 |
| 6836326 | Rheo-optical indexer and method of screening and characterizing arrays of materials A method and apparatus for characterizing and screening an array of material samples is disclosed. The apparatus includes a sample block having a plurality of regions for containing the material samples, a polarized light source to illuminate the materials, an analy... | 12/28/2004 |
| 6785051 | Intrinsic birefringence compensation for below 200 nanometer wavelength optical lithography components with cubic crystalline structures Stress-induced photoelastic birefringence compensates for intrinsic birefringence of cubic crystalline structures in deep ultraviolet (less than 200 nm) microlithographic imaging systems. Both the photoelastic birefringence and the intrinsic birefringence are expres... | 08/31/2004 |
| 6665059 | Method of measuring an inner stress state of disk substrate A measuring method capable of automatically analyzing quantitatively the inner state of a disk is provided. Linearly polarized light from a light source enters a retarder to produce a desired elliptically polarized state. The elliptically polarized light ... | 12/16/2003 |
