| Patents for G01J 9 - Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength (4,525) |
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| 12/07/1999 | US5999271 Methods and devices to determine the wavelength of a laser beam |
| 12/01/1999 | EP0960321A1 Device for measurement of optical wavelengths |
| 11/30/1999 | US5995228 Wavelength dispersion measuring apparatus and polarization dispersion measuring apparatus |
| 11/30/1999 | US5995223 Apparatus for rapid phase imaging interferometry and method therefor |
| 11/30/1999 | US5995207 Method for determining the phase difference of light waves propagated over two paths |
| 11/30/1999 | US5994687 System for correction the shape of a wave-front of a laser beam |
| 11/25/1999 | WO1999060679A1 Reliable modular production quality narrow-band high rep rate f2 laser |
| 11/25/1999 | WO1999060629A1 Device and method for detecting the phase and amplitude of electromagnetic waves |
| 11/25/1999 | DE19821974A1 Phase and amplitude detector of electromagnetic waves from pixels operating in visible, UV and IR wavelengths |
| 11/17/1999 | EP0920600A4 Superheterodyne interferometer and method for compensating the refractive index of air using electronic frequency multiplication |
| 11/17/1999 | EP0920599A4 Superheterodyne method and apparatus for measuring the refractive index of air using multiple-pass interferometry |
| 11/11/1999 | WO1999057650A1 Method for reconstructing a surface using a linear prediction and applications of said method |
| 11/09/1999 | US5982490 Apparatus and method for wavefront absolute calibration and method of synthesizing wavefronts |
| 11/02/1999 | US5978391 Wavelength reference for excimer laser |
| 11/02/1999 | US5978053 Characterization of collimation and beam alignment |
| 11/02/1999 | CA2007776C Phase modulated spectrophotometry |
| 10/27/1999 | CN1233323A Method and device for determining the phase-and/or amplitude data of an electromagnetic wave |
| 10/26/1999 | US5973781 Interferometric arrangement for scanning an object |
| 10/24/1999 | CA2270102A1 Wavelength monitoring system |
| 10/20/1999 | EP0770219B1 An optical measurement method and apparatus |
| 10/07/1999 | WO1999050628A1 Fiber-optic frequency shifter, optical interferometer and method of generating two complementary optical interference signals using the same |
| 10/07/1999 | DE19904312A1 Wavelength measuring apparatus used to measure wavelength of light |
| 10/07/1999 | DE19814221A1 Method or determining phase distributions and differences in light and infrared beams for use in non-destructive testing |
| 10/07/1999 | DE19814057A1 Spectral interferometric optical tomography device |
| 10/07/1999 | CA2291615A1 Fiber-optic frequency shifter, optical interferometer and method of generating two complementary optical interference signals using the same |
| 09/28/1999 | US5959727 System and method for discriminating between direct and reflected electromagnetic energy |
| 09/22/1999 | EP0943112A1 Spherical-aberration detection system and optical device using the same |
| 09/16/1999 | DE19809055A1 Two-beam interferometer with phase mask of constant grating period used as beam splitter |
| 09/15/1999 | EP0942261A1 Procedure and device to measure the bottom of craters in a physico-chemical analyser |
| 09/09/1999 | DE19809056A1 Optical phase shifter for interferometer |
| 09/09/1999 | DE19808273A1 Interferometrische Meßeinrichtung zum Erfassen der Form oder des Abstandes insbesondere rauher Oberflächen Interferometric measuring device for detecting the shape of or the distance of rough surfaces and in particular |
| 09/07/1999 | US5949544 Methods and apparatus for performing very rapid scan spectrometry using a balanced mirror assembly driven at the resonance frequency |
| 09/07/1999 | US5949521 Method and apparatus for improving vision and the resolution of retinal images |
| 09/02/1999 | WO1999044009A1 Interferometric measuring device for determining the profile or the pitch of especially rough surfaces |
| 09/01/1999 | EP0939312A1 Method and apparatus for measuring the complex spectrum (amplitude and phase) of optical pulses |
| 09/01/1999 | CN1227631A Interferometer and method for compensation of dispersion or increase in spectral resolution of such an interferometer |
| 08/31/1999 | US5946429 Time-division multiplexing of polarization-insensitive fiber optic michelson interferometric sensor |
| 08/26/1999 | WO1999042787A1 Interferometer and method for measuring the refractive index and optical path length effects of air |
| 08/26/1999 | WO1999042786A1 Apparatus and methods for measuring intrinsic optical properties of a gas |
| 08/26/1999 | WO1999042785A2 Apparatus and method for measuring the refractive index and optical path length effects of air using multiple-pass interferometry |
| 08/25/1999 | EP0937973A2 Wavelength dispersion measuring apparatus and polarization dispersion measuring apparatus |
| 08/19/1999 | WO1999041576A1 Method and device for determining the distribution of intensity and phase in a laser beam different cutting planes |
| 08/17/1999 | CA2200039C Method to resolve phase ambiguities in a phase measurement |
| 08/17/1999 | CA2053724C System for measuring the refractive index profile of optical components |
| 08/12/1999 | WO1999040392A1 Noise supression apparatus and method for time division multiplexed fiber optic sensor arrays |
| 08/11/1999 | EP0934501A1 A multi-wavelength reference |
| 08/10/1999 | US5937103 Method and apparatus for alias free measurement of optical transfer function |
| 08/10/1999 | US5936720 Beam characterization by wavefront sensor |
| 08/04/1999 | EP0933629A1 Interference method and apparatus for measuring the phase shift between two light beams emanating from a single polarised source, with application to refractometry |
| 08/04/1999 | EP0932814A1 An optical wavelength scanner employing a reference system |
| 08/03/1999 | US5933236 Phase shifting interferometer |
| 07/28/1999 | EP0809797B1 Interferometric sensing device |
| 07/21/1999 | EP0930485A2 Device to detect or to create optical signals |
| 07/15/1999 | DE19800844A1 Method for wave front measurement using Shack-Hartmann sensor |
| 07/07/1999 | EP0927342A1 Interferometer and method for compensation of dispersion or increase in spectral resolution of such an interferometer |
| 06/30/1999 | EP0826254B1 Optical frequency generator |
| 06/29/1999 | US5917597 Noise suppression apparatus and method for time division multiplexed fiber optic sensor arrays |
| 06/24/1999 | WO1999031460A1 Wavelength measuring device with a mach zehnder interferometer controlled without mean value |
| 06/16/1999 | EP0620912B1 Structure for the dynamic support of reflective elements |
| 06/15/1999 | US5912731 Hartmann-type optical wavefront sensor |
| 06/09/1999 | EP0921382A2 Hartmann-type optical wavefront sensor |
| 06/09/1999 | EP0920600A1 Superheterodyne interferometer and method for compensating the refractive index of air using electronic frequency multiplication |
| 06/09/1999 | EP0920599A1 Superheterodyne method and apparatus for measuring the refractive index of air using multiple-pass interferometry |
| 06/02/1999 | EP0919795A2 Method for determining the phase difference of light waves propagated over two paths |
| 06/02/1999 | DE19749377A1 Interferometer arrangement, e.g. for Sagnac interferometer |
| 06/01/1999 | US5909305 Method and apparatus for monitoring the momental wavelength of light, and an optical amplifier and an optical communication system which incorporate the method and apparatus to adjust gain tilt |
| 05/27/1999 | WO1999018520B1 Nonuniform sampling for spectral and related applications |
| 05/25/1999 | US5907404 Multiple wavelength image plane interferometry |
| 05/11/1999 | US5903350 Demodulator and method useful for multiplexed optical sensors |
| 05/06/1999 | DE19748619A1 Measuring surfaces using illumination of white light microscope with spectral lamp |
| 04/29/1999 | DE19743493A1 Laser frequency measurement method |
| 04/28/1999 | EP0911621A2 Optical device for wavelength monitoring and wavelength control |
| 04/27/1999 | US5898502 Optical wavelength monitoring apparatus |
| 04/27/1999 | US5898495 Tilt-compensated interferometer |
| 04/21/1999 | EP0909963A1 Article comprising a bragg reflective mach-zehnder filter of reduced coupler dependence |
| 04/20/1999 | US5896201 Optical device for wavelength monitoring and wavelength control |
| 04/20/1999 | US5896198 Optical heterodyne-based method and apparatus for determining the concentration of optically active substances |
| 04/15/1999 | WO1999018520A1 Nonuniform sampling for spectral and related applications |
| 04/15/1999 | WO1999018466A1 Spherical-aberration detection system and optical device using the same |
| 04/14/1999 | EP0908710A2 Apparatus and method for measuring characteristics of light |
| 04/14/1999 | CN1214119A Radiation field analyzer |
| 04/06/1999 | US5892582 Fabry Perot/fiber Bragg grating multi-wavelength reference |
| 04/01/1999 | WO1999015867A1 Method and device for wavefront optical analysis |
| 03/30/1999 | US5890095 System for receiving and enhancing electromagnetic radiation input signals |
| 03/30/1999 | US5889899 Article comprising a Bragg reflective Mach-Zehnder filter of reduced coupled dependence |
| 03/18/1999 | WO1999013291A1 Multiple wavelength image plane interferometry |
| 03/17/1999 | CN1210975A Adjustable optical test apparatus and system including interferometer with micromirror |
| 03/16/1999 | US5883717 Optical quadrature interferometry utilizing polarization to obtain in-phase and quadrature information |
| 03/11/1999 | WO1999012009A1 Laser interferometer |
| 03/10/1999 | EP0776536B1 Stabilised multi-frequency light source and method of generating synthetic light wavelengths |
| 02/11/1999 | WO1999006852A1 System and method for discriminating between direct and reflected electromagnetic energy |
| 02/11/1999 | WO1999006794A1 Pulse measurement using frequency shifting techniques |
| 02/04/1999 | WO1999005491A1 Wavelength measuring system |
| 02/02/1999 | US5867268 Optical fiber interferometer with PZT scanning of interferometer arm optical length |
| 02/02/1999 | US5867267 Interferometric device for detection |
| 01/28/1999 | WO1999004467A1 Wavelength reference for excimer laser |
| 01/26/1999 | US5864381 Automated pupil remapping with binary optics |
| 01/21/1999 | WO1999002939A1 Methods and devices for very rapid scan interferometry |
| 01/07/1999 | DE19726931A1 Interferometric method to measure phase difference between superimposed optical waves |
| 12/22/1998 | US5852507 High efficiency polarization diversity receiver system |