Patents
Sitemap › G01 - Measuring; Testing › G01J - Measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infra-red, visible or ultra-violet light; Colorimetry; Radiation pyrometry › G01J 9 - Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
Patents for G01J 9 - Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength (4,525)
05/1990
05/09/1990EP0367675A1 Integrated optic device for the measurement of the refraction index of a fluid
05/09/1990EP0366722A1 Fuel control device
05/01/1990CA2001914A1 Interferometer
04/1990
04/19/1990DE3825606A1 Compact construction of a Michelson interferometer for the measurement of changes in length and in refractive index
04/17/1990US4918491 Emission spectral width measuring apparatus for light source
04/11/1990EP0362474A2 Laser warning detector
03/1990
03/27/1990US4912530 Optical heterodyne measuring apparatus
03/27/1990US4912526 Optical frequency synthesizer/sweeper
03/22/1990WO1990002930A1 Interferometry
03/20/1990US4909630 Method and device for determining the change in thickness and/or orientation within a strip of optically active material
03/20/1990US4909628 Optical heterodyne detector
03/14/1990EP0357754A1 Arrangement for determining wavelength or refractive index
03/13/1990US4907886 Method and apparatus for two-wavelength interferometry with optical heterodyne processes and use for position or range finding
03/13/1990US4907885 Heterodyne laser diagnostic system
03/07/1990EP0356443A1 A wavelength-independent interferometer for optical signal processing.
03/07/1990EP0148853B1 Quadature fiber-optic interferometer matrix
03/06/1990US4906095 Apparatus and method for performing two-frequency interferometry
02/1990
02/27/1990US4905244 Heterodyne laser spectroscopy system
02/27/1990US4905169 Method and apparatus for simultaneously measuring a plurality of spectral wavelengths present in electromagnetic radiation
02/27/1990US4904088 Method and apparatus for determining radiation wavelengths and wavelength-corrected radiation power of monochromatic light sources
02/27/1990US4904082 Fringe visibility enhancement arrangement and method
02/13/1990US4900150 Multiple input source technique for deriving cavity linewidth
01/1990
01/23/1990CA1264580A1 Optical image processor
01/09/1990US4893353 Optical frequency synthesizer/sweeper
12/1989
12/13/1989EP0346213A2 Enlarged-range measuring device for the non-reciprocal phase shift produced in a ring interferometer, and measuring process
12/12/1989US4886360 Method and apparatus for particle analysis
11/1989
11/23/1989EP0342885A2 Laser interferometer with optical feedback isolation
11/15/1989EP0341960A2 Method for improving performance of a laser interferometer in the presence of wavefront distortion
11/08/1989EP0340577A2 Method and device for determining the refractive index of a substance
11/02/1989EP0339885A2 Method and device for nondestructive evaluation
10/1989
10/25/1989EP0338288A2 Particulate inspection of fluids
10/25/1989CN2046623U Integrated optical interferometer
10/24/1989US4875775 Reciprocally switched four modulator system
10/18/1989EP0337796A2 Device for measuring optical frequency modulation characteristics
10/17/1989US4874223 Optical notch filter for discriminating against coherent radiation
10/10/1989US4872756 Dual path interferometer with varying difference in path length
10/10/1989US4872755 Interferometer for measuring optical phase differences
10/05/1989WO1989009380A1 Optical measuring apparatus and method
10/03/1989US4871254 Method and device for detecting propagation time variations in a ring interferometer and application thereof to wave length control
10/03/1989US4871250 Beam monitor for a high-output laser
09/1989
09/28/1989DE3907276A1 Interferometer and method for gas analysis
09/27/1989EP0333822A1 Optical devices for interferometric measuring systems
09/26/1989CA1261449A1 Monomode optical fiber reciprocal ring interometer device
09/21/1989WO1989008825A1 Arrangement for determining wavelength or refractive index
09/20/1989EP0332699A1 Method and apparatus for detecting the wavelength of a laser beam
09/19/1989US4868378 Device for locating the source of coherent light through a turbulent medium
09/12/1989US4865454 Adaptive optical system with synchronous detection of wavefront phase
09/12/1989US4865450 Dual photoelastic modulator heterodyne interferometer
09/05/1989US4864578 Scannable laser with integral wavemeter
09/05/1989US4862917 Fuel control device, fuel control system using the device and method of making the device
08/1989
08/29/1989US4861136 Optical communication systems using fabry-perot cavities
08/24/1989WO1989007756A1 Integrated optical interference method
08/24/1989DE3804134A1 Method and apparatus for measuring the concentration of a foreign gas in a gas mixture by using a Moiré filter
08/22/1989US4859843 Method and apparatus for optical signal analysis using a gated modulation source and an optical delay circuit to achieve a self-homodyne receiver
08/15/1989US4856899 Optical frequency analyzer using a local oscillator heterodyne detection of incident light
08/15/1989CA1258383A1 Wavelength switched passive fiber interferometric sensor
08/09/1989EP0326612A1 Optical notch filter for discriminating against coherent radiation
08/09/1989EP0326603A1 Optical detection system
07/1989
07/26/1989EP0325480A2 Method and apparatus for optical signal analysis using a gated modulation source and an optical delay circuit to achieve a self-homodyne receiver
07/20/1989DE3900247A1 Method and device for Fourier spectrophotometry
07/18/1989US4848907 Method of and apparatus for analyzing interference fringes
07/11/1989US4847477 Reducing phase fluctuations in a coherent radiation beam using feedforward control
07/04/1989US4844616 Interferometric dimensional measurement and defect detection method
07/04/1989US4844593 Optical feedback isolator
06/1989
06/29/1989WO1989005956A1 Laser heterodyne techniques
06/27/1989US4842408 Phase shift measuring apparatus utilizing optical meterodyne techniques
06/15/1989DE3833201A1 Interferometric measuring system having a wavelength correcting device for the laser light, in particular for length measurements
06/06/1989US4836681 Fringe pattern phase detection system
05/1989
05/31/1989EP0318288A2 Electro-optic imaging system
05/24/1989EP0316359A1 Optical wavelength monitor
05/23/1989US4833681 Semiconductor laser wavelength stabilizer
05/23/1989US4833314 Variable phase stop for use in interferometers
05/23/1989US4832492 Heterodyne michelson interferometer for polarization measurements
05/23/1989US4832489 Two-wavelength phase-shifting interferometer and method
05/17/1989EP0315663A1 Compact continuous wave wavefront sensor.
05/16/1989US4830451 Technique and apparatus for fabricating a fiber Fabry-Perot etalon
05/10/1989EP0314709A1 Two-wavelength interferometry with optical heterodyne process.
05/09/1989US4828367 Interferometer bearing assembly
05/03/1989CN1004104B High speed multiple frames interferometer for transient flow field
04/1989
04/25/1989US4825062 Extendable large aperture phased array mirror system
04/25/1989US4824243 Compact continuous wave wavefront sensor
04/20/1989WO1989003516A1 Optical devices for interferometric measuring systems
04/11/1989US4820047 Laser heterodyne apparatus for measuring optical power
04/04/1989USH615 High speed/low light wavefront sensor system
03/1989
03/28/1989US4817101 Heterodyne laser spectroscopy system
03/28/1989US4817100 Monitoring and controlling source stability
03/23/1989DE3730257A1 Messgeraet fuer spektralcharakteristiken einer laserstrahlung Meter for spectral characteristics of laser radiation
03/22/1989EP0307960A2 Optical heterodyne detector
03/09/1989WO1989002068A1 Method and apparatus for detecting the wavelength of a laser beam
02/1989
02/23/1989WO1989001644A1 Optical notch filter for discriminating against coherent radiation
02/23/1989WO1989001612A1 Optical detection system
02/22/1989EP0303630A1 Variable phase stop for use in interferometers.
02/14/1989US4804269 Iterative wavefront measuring device
02/07/1989US4802764 Differential plane mirror interferometer having beamsplitter/beam folder assembly
02/01/1989EP0301048A1 Improvements relating to optical interferometers.
01/1989
01/26/1989WO1989000654A1 Fuel control device
01/25/1989EP0300640A2 Optical communication systems using Fabry-Perot cavities
01/17/1989US4798468 Interference apparatus for detecting state of wave surface
01/17/1989US4798467 Heterodyne laser instantaneous frequency measurement system
01/12/1989WO1989000281A1 Transillumination imaging system using the antenna properties of heterodyne detection
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