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| Number | Title | Issue Date |
| 8049889 | Switchable imaging polarimeter and method A polarimeter and method of polarizing incoming light includes an optical assembly, a first adjustable circular retarder that rotates the polarization content of incoming light, a polarization beam splitter that receives light from the adjustable circular retarder a... | 11/01/2011 |
| 7839505 | Optical rotating power measurement method and optical rotating power measurement apparatus An optical rotating power measurement method comprising: an optical rotating power data acquisition step of starting measurement of the optical rotating power of the sample in a measurement apparatus during a temperature changing process where a controller controls ... | 11/23/2010 |
| 7821637 | System for controlling intensity of a beam of electromagnetic radiation and method for investigating materials with low specular reflectance and/or are depolarizing Disclosed is a system for controlling focus, angle of incidence and intensity of an electromagnetic beam over a spectrum of wavelengths, and methodology for optimizing investigation of samples which demonstrate low specular reflectance and/or are depolarizing of a p... | 10/26/2010 |
| 7808637 | Method and apparatus for determining liquid crystal cell parameters from full mueller matrix measurements Method and apparatus for testing of LCD cells is disclosed. An LCD cell under test (14, 30) may be mounted to translatable table (40) between polarization state generator (10) and polarization state analyzer (16). For each location on cel... | 10/05/2010 |
| 7800755 | High-speed polarimeter having a multi-wavelength source A polarimeter includes a multi-wavelength source for generating electromagnetic waves having at least two different wavelengths, means for separating electromagnetic waves, the electromagnetic waves including electromagnetic waves generated by the multi-wavelength s... | 09/21/2010 |
| 7719684 | Method for enhancing polarimeter systems that use micro-polarizers This invention solves a problem of registration and improves signal-to-noise ratio (SNR) when using division-by-focal-plane array to produce multiple polarization images. This is achieved by processing a sequence of angular-position-dithered frames to generate a hig... | 05/18/2010 |
| 7705985 | Method and apparatus for testing fibres The present disclosure relates to a method for measuring the maturity or cell wall thickening of a sample of cellulosic fiber. The method at least includes exposing the sample of fiber to polarized light, capturing one or more images of the sample through crossed po... | 04/27/2010 |
| 7599062 | Local non-perturbative remote sensing devices and method for conducting diagnostic measurements of magnetic and electric fields of optically active mediums Embodiments of the present invention are directed to pulsed polarimeters for conducting remote, non-perturbative diagnostic measurements of inducing fields of a medium demonstrating induced optical activity. In one aspect, a pulse polarimeter includes a light source... | 10/06/2009 |
| 7456962 | Conical refraction polarimeter A polarimeter for receiving input electromagnetic radiation characterized by a polarization state and for determining the polarization state. The polarimeter includes a refractive arrangement for refracting the input electromagnetic radiation so as to provide a spat... | 11/25/2008 |
| 7426030 | Reduced gas flow purging system in reflectometer, ellipsometer, polarimeter and the like systems Reflectometer, ellipsometer, polarimeter or the like system, which functionally comprise means for providing gas confined in a mini-chamber near the surface of a sample, at a location at which a beam having UV, VUV, IR and NIR wavelengths of electromagnetic radiatio... | 09/16/2008 |
| 7420675 | Multi-wavelength imaging system The present invention relates to a multi-energy system that generates and/or forms images of targets/structures by applying Mueller matrix imaging principles and/or Stokes polarimetric parameter imaging principles to data obtained by the multi-energy system. In one ... | 09/02/2008 |
| 7414733 | Azimuthal scanning of a structure formed on a semiconductor wafer A structure formed on a semiconductor wafer is examined by obtaining measurements of cross polarization components of diffraction beams, which were obtained from scanning an incident beam over a range of azimuth angles to obtain an azimuthal scan. A zero azimuth pos... | 08/19/2008 |
| 7385695 | Polarimetry The present invention relates to an assembly and method for measuring the optical activity of a stimulus of interest. The assembly comprises a source of incident electromagnetic radiation (1), a lens arrangement (2), an input polariser (3), a pl... | 06/10/2008 |
| 7372565 | Spectrometer measurement of diffracting structures A normal incidence reflectometer includes a rotatable analyzer/polarizer for measurement of a diffracting structure. Relative rotation of the analyzer/polarizer with respect to the diffracting structure permits analysis of the diffracted radiation at multiple polari... | 05/13/2008 |
| 7372567 | Retardance measurement system and method In an apparatus and method for measuring parameters related to retardance and slow axis azimuth in sample specimens, a sample is illuminated by circularly polarized monochromatic light which is then analyzed by an elliptical analyzer at different settings. In anothe... | 05/13/2008 |
| 7372941 | System and method for matching diffraction patterns A method of analyzing patterns. The method comprises: receiving a first diffraction pattern; receiving a second diffraction pattern; receiving a third diffraction pattern; determining a similarity between the first and second diffraction patterns; determining a simi... | 05/13/2008 |
| 7369234 | Method of performing optical measurement on a sample The invention relates to a method of performing an optical measurement on a sample, such as an ellipticity measurement. The sample is irradiated with a polarized irradiation beam and a return beam is linearly polarized. The irradiation or return beam is modulated wi... | 05/06/2008 |
| 7369334 | Optical device with alignment compensation An optical device is provided which includes a plurality of optical modules and an alignment compensation module. Each optical module includes an optical component fixedly coupled to a relative reference mount. The relative reference mount is configured to attach to... | 05/06/2008 |
| 7360897 | Fundus examination apparatus A fundus examination apparatus includes an illumination optical system (20), which illuminates a fundus by fundus illumination light, an imaging optical system (21), which photographs a fundus image based on a polarization property of reflected illumin... | 04/22/2008 |
| 7359582 | Method based on stokes parameters for the adaptive adjustment of PMD compensators in optical fiber communication systems and compensator in accordance with said method A method for the adaptive adjustment of a PMD compensator in optical fiber communication systems with the compensator comprising a cascade of adjustable optical devices through which passes an optical signal to be compensated and comprising the steps of computing th... | 04/15/2008 |
| 7355140 | Method of and apparatus for multi-stage sorting of glass cullets A method and system for sorting different colored objects, preferably glass cullets, into separate groups of same colored objects comprising a plurality of sorting devices for receiving an input feed of different colored objects and sorting the different colored obj... | 04/08/2008 |
| 7351929 | Method of and apparatus for high speed, high quality, contaminant removal and color sorting of glass cullet A system for sorting a mixed stream of different colored cullet into separate groups of same colored cullet comprises a light emitting source for transmitting light, such as white light, through a cullet, and a camera having a plurality of pixels for receiving light... | 04/01/2008 |
| 7349087 | Method for determining stokes parameters A method of determining polarization profiles of points in a scene from video frames using Stokes parameters. The method includes emitting scene light rays from points in a region in a scene, and emitting a correlator light ray from a correlator. The correlator incl... | 03/25/2008 |
| 7336360 | Imaging polarimetry To effectively reduce a measurement error in a parameter indicating two-dimensional spatial distribution of a state of polarization generated by variations in retardation of a birefringent prism pair due to a temperature change or other factors, while holding a vari... | 02/26/2008 |
| 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 |
| 7333189 | Spectroscopic diagnostic methods and system The present invention provides systems and methods for the determination of the physical characteristics of a structured superficial layer of material using light scattering spectroscopy. The light scattering spectroscopy system comprises optical probes that can be ... | 02/19/2008 |
| 7326871 | Sorting system using narrow-band electromagnetic radiation A system for sorting articles includes a detector system having a plurality of narrow bandwidth sources of electromagnetic energy sequentially illuminating articles passing through the detector system, the detector system further including a collector for collecting... | 02/05/2008 |
| 7304719 | Patterned grid element polarizer The invention relates to a patterned grid polarizer for use in lithography, comprising a substrate that is transparent to ultraviolet (UV) light; and an array of elements patterned on the substrate, wherein the elements polarize UV light. The array of elements can b... | 12/04/2007 |
| 7304736 | Method and apparatus for measuring polarization A method of nonlinear polarimetry for measuring higher order moments of the E field of an optical signal is provided. The method includes imposing a phase delay on a first polarization of a received optical signal with respect to a second polarization of the optical... | 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 |
| 7301633 | High-throughput chiral detector and methods for using same A new generation polarimetry apparatus and methodology is disclosed, which involve passing polarized light through a sample including a chiral analyte, where the analyte is under the influence of a periodically varying magnetic field. The apparatus also utilizes opt... | 11/27/2007 |
| 7287855 | Method and system for removing the effects of corneal birefringence from a polarimetric image of the retina A scanning laser polarimetry (SLP) system that measures retinal nerve fiber layer (RNFL) retardance in a single scan image with improved sensitivity. An external bias retarder in combination with the anterior segment retardance forms a nonzero joint retardance adapt... | 10/30/2007 |
| 7286227 | Method and system for removing the effects of corneal birefringence from a polarimetric image of the retina A scanning laser polarimetry (SLP) system that measures in vivo retinal nerve fiber layer (RNFL) retardance (δN, θN) in a single measurement without a variable corneal compensator (VCC). The diagnostic signal is biased so that the detected RN... | 10/23/2007 |
| 7283234 | Use of ellipsometry and surface plasmon resonance in monitoring thin film deposition or removal from a substrate surface Improved methodology for monitoring deposition or removal of material to or from a process and/or wittness substrate which demonstrates a negative e1 at some wavelength. The method involves detection of changes in P-polarized electromagnetism ellipsometric DE... | 10/16/2007 |
| 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 |
| 7274449 | System for determining stokes parameters A system for determining polarization profiles of points in a scene from video frames using Stokes parameters includes a scene having a region that emits scene light rays that correspond to the points in the scene, a color filter, a Stokes filter that includes a rot... | 09/25/2007 |
| 7272091 | Birefringence characteristic measuring method, optical recording medium and optical information recording/reproducing apparatus Four types of optical systems, a polarization optical system including an objective lens having a high numerical aperture, a polarization optical system including an objective lens having a low numerical aperture, a non-polarization optical system including an objec... | 09/18/2007 |
| 7265836 | In-line optical polarimeter using free-space polarization sampling elements This application teaches various implementations of methods and in-line polarimeters with free-space sampling elements to sample four sample beams for determining the polarization state of input light. In one exemplary implementation, a device in this application in... | 09/04/2007 |
| 7265837 | Sensitive polarization monitoring and controlling Techniques and devices for monitoring polarization of light using at least two polarization elements where the difference between the outputs of the two polarization elements are used to monitor a change in polarization. ... | 09/04/2007 |
