| Patents for G01J 9 - Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength (4,525) |
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| 06/09/1992 | US5120131 Method and apparatus for selecting detection of changes in samples by integrated optical interference |
| 06/09/1992 | US5120128 Apparatus for sensing wavefront aberration |
| 06/03/1992 | EP0487992A2 Optical sensor |
| 06/02/1992 | CA1302076C Method and apparatus for two-wavelength interferometry withoptical heterodyne processes and use for position or range finding |
| 05/27/1992 | DE4037431A1 Optical sensor for liq. or gaseous media - such that in region of waveguide sensor has layer of hetero-polysiloxane to be contacted with substance under test |
| 05/26/1992 | US5116133 Apparatus for and method of identifying spectrally pure optical radiation |
| 05/19/1992 | US5115127 Optical fiber sensor for measuring physical properties of fluids |
| 05/12/1992 | US5113064 Method and apparatus for phasing segmented mirror arrays |
| 05/05/1992 | US5110211 Optical interference signal extractor with device for reduced noise from optical light power variation |
| 04/29/1992 | EP0482545A2 System for measuring the characteristics, such as particularly the refractive index profile of optical components |
| 04/29/1992 | EP0190310B1 Spectral analyzer and direction indicator |
| 04/28/1992 | CA1299712C Heterodyne laser spectroscopy system |
| 04/22/1992 | EP0481440A2 Sensor for the detection of a substance |
| 04/22/1992 | EP0481242A2 An optical frequency sweep measure and control device for laser light |
| 04/15/1992 | EP0414889A4 Single beam ac interferometer |
| 04/14/1992 | CA1298773C Fuel control device, fuel control system using the device and method of making the same |
| 04/08/1992 | EP0478785A1 Apparatus for measuring wavelength of light by high precision detection of interference fringe |
| 04/02/1992 | WO1992005429A1 Optical immunoassay |
| 04/01/1992 | EP0241512B1 A common optical path interferometric gauge |
| 03/26/1992 | DE4029928A1 Complete analysis of electromagnetic radiation - using computer-controlled interferometer, with beam modulation via linear displacement of mirrors |
| 03/25/1992 | EP0476910A2 Mode partition screening apparatus |
| 03/20/1992 | CA2049849A1 Mode partition screening apparatus |
| 03/17/1992 | US5096296 Method for measuring optical path difference of an imbalanced interferometer in a system |
| 03/12/1992 | DE4028051A1 Grating interferometer with diffraction screens in series - makes multiple use of resulting diffraction orders as multiple or non-polarised heterodyne interferometer or interference spectrometer |
| 03/11/1992 | EP0314709B1 Two-wavelength interferometry with optical heterodyne process |
| 03/11/1992 | EP0247067B1 Solid-state wavefront slope determination |
| 03/10/1992 | CA1296919C Distributed sensor array and method using a pulsed signal source |
| 02/19/1992 | EP0471015A1 Apparatus for measuring the mode quality of a laser beam |
| 01/29/1992 | EP0468816A2 Fourier transform spectroscope with quadrangular common path interferometer |
| 01/22/1992 | EP0467343A2 Optical heterodyne interferometer |
| 01/21/1992 | US5083015 Optical centroid processor wavefront sensor |
| 01/09/1992 | WO1992000549A1 Multichannel analogue detection method and device |
| 01/08/1992 | EP0464337A2 Measurement of size and refractive index of particles using the complex forward-scattered electromagnetic field |
| 01/07/1992 | US5078491 Apparatus for measuring the mode quality of a laser beam |
| 01/02/1992 | DE4018664A1 Grid refractometer measuring refractive index and/or stabilising - has stable air gap for use as beam splitter for wavelengths of EM radiation in medium |
| 12/24/1991 | US5074666 High stability interferometer for measuring small changes in refractive index and measuring method using the interferometer |
| 12/17/1991 | US5073024 Integrated optical device for measuring the refractive index of a fluid |
| 12/12/1991 | WO1991019025A1 Process for the measurement of the thickness and refractive index of a thin film on a substrate, and a device for carrying out the process |
| 12/11/1991 | EP0460268A1 Integrated optics device for interferometrically measuring light waves |
| 12/10/1991 | US5072140 Automatic gain control for interferometers and phase sensitive detectors |
| 12/10/1991 | US5072120 Electromagnetic imager device |
| 12/10/1991 | US5072104 Achromatic null lens |
| 12/10/1991 | US5071251 Wavelength independent interferometer |
| 12/04/1991 | EP0459494A2 Method and apparatus for detecting wavelength of laser beam |
| 12/03/1991 | US5070260 Ultrahigh-resolution optical parametric oscillator frequency measurement and synthesis system |
| 12/03/1991 | US5069527 Apparatus for measuring the mode quality of a laser beam |
| 12/02/1991 | CA2043582A1 Method and apparatus for detecting wavelength of laser beam |
| 11/27/1991 | EP0458601A1 Method of and apparatus for measuring spectral absorption in opaque specimens and method of and apparatus for measuring microscopic absorption distribution |
| 11/26/1991 | US5068525 Apparatus for measuring the duration of single optical radiation pulses |
| 11/21/1991 | EP0456637A1 Phase modulated spectrophotometry |
| 11/19/1991 | US5066128 Digital pulse counting method for measuring the optical path difference of an imbalanced interferometer |
| 11/19/1991 | CA1292282C Optical communication systems using fabry-perot cavities |
| 11/12/1991 | US5064284 Apparatus for measuring the mode quality of a laser beam |
| 11/06/1991 | EP0455218A1 Method and apparatus for measuring a phase-modulated signal |
| 11/05/1991 | US5063567 Photoreceptor for frequency-modulated optical signals |
| 11/05/1991 | US5062702 Device for mapping corneal topography |
| 10/29/1991 | US5061070 Particulate inspection of fluids using interferometric light measurements |
| 10/24/1991 | DE4109182A1 Sample evaluation system using thermal expansion deformation - using optical interference between reflected stimulation beam and reference beam with different frequency |
| 10/23/1991 | EP0453228A2 Fiber optic interferometric chemical sensor |
| 10/22/1991 | US5059027 Spatial heterodyne spectrometer and method |
| 10/21/1991 | CA2039007A1 Fiber-optic interferometric chemical sensor |
| 10/16/1991 | EP0452283A2 Coded-fringe interferometric method and device for wavefront detection in optics |
| 10/10/1991 | DE4017201A1 Transparent photoelectric light detector - has partial absorption of light by thin sensitive layer, and substantial transmission |
| 10/09/1991 | EP0450246A1 Optical distance measurement device |
| 10/08/1991 | US5056101 Mode partition screening apparatus |
| 10/08/1991 | US5054924 Method for extracting long-equivalent wavelength interferometric information |
| 10/03/1991 | WO1991014928A1 Apparatus for measuring wavelength of light by high precision detection of interference fringe |
| 10/03/1991 | WO1991014921A1 Dynamic lateral shearing interferometer |
| 10/02/1991 | EP0449335A2 Interferometer |
| 10/01/1991 | US5052806 Apparatus for measuring non-absorptive scattering |
| 09/19/1991 | DE4102378A1 Interferometric tester for section of converging waves surface - has optics forming parallel duplication of image of diaphragm shutter providing selectable azimuth |
| 09/18/1991 | EP0447067A1 Device for mapping corneal topography |
| 09/17/1991 | US5049734 Method for determining petal piston in a segmented imaging system |
| 09/17/1991 | US5048964 Phase-stepping interferometry |
| 09/17/1991 | US5048935 Method for adaptive correction of the phase non-uniformity of a liquid crystal light valve |
| 09/12/1991 | DE4007321A1 Wave or phase front measurement for electromagnetic waves - has detector and optical input coupling supported by thermally stabilised carrier |
| 09/11/1991 | EP0445293A1 Light receiving system of heterodyne detection and image forming device for light transmission image using said light receiving system |
| 09/11/1991 | EP0377571B1 Imaging process and system for transillumination with photon frequency marking |
| 09/10/1991 | US5047845 Charge-transfer-device planar array for detecting coherent-light phase |
| 09/10/1991 | US5047626 Optical fiber sensor for measuring physical properties of liquids |
| 09/10/1991 | US5047620 Laser pulse receiver for detecting and recording weak laser pulses in variable background radiation |
| 08/28/1991 | EP0443477A1 Michelson type interferometer for the generation of optical path differences |
| 08/27/1991 | US5043726 Spectral analyzer and direction indicator for laser guided aircraft landing system |
| 08/27/1991 | US5042950 Apparatus and method for laser beam diagnosis |
| 08/27/1991 | US5042922 Method for improvidng the spatial resolution in an integrated adaptive optics apparatus |
| 08/22/1991 | WO1991012545A1 Method for producing an index lattice in an optical fibre, and a quasi-distributed sensor array formed therein |
| 08/22/1991 | WO1991012502A1 Wave front sensor |
| 08/16/1991 | WO1991012499A1 Wavelength detector |
| 08/16/1991 | CA2051398A1 Wavelength detecting apparatus |
| 08/14/1991 | EP0441693A1 Method for making an index grating in an optical fibre, and quasi-distributed sensor network realized in this fibre |
| 08/14/1991 | DE4003698A1 Wellenfrontsensor Wavefront sensor |
| 08/06/1991 | US5037202 Measurement of size and refractive index of particles using the complex forward-scattered electromagnetic field |
| 08/01/1991 | DE4002552A1 Measurement of wavelength of spectrally narrow-band light source - using reference source, Fabry-Perot interferometer and measurement of intensity maxima separation |
| 07/16/1991 | US5032714 Light waveform measuring device including a streak camera |
| 07/02/1991 | US5027854 Fuel control device, fuel control system using the device and method of making the device |
| 07/02/1991 | CA1285640C Light-driven phase shifter |
| 06/25/1991 | US5027435 Optical communication systems using Fabry-Perot cavities |
| 06/25/1991 | US5026977 Wavefront sensing and correction with deformable mirror |
| 06/11/1991 | US5022757 Heterodyne system and method for sensing a target substance |
| 06/11/1991 | US5022754 Determining the wavelength of optical radiation |