| Patents for G01J 1 - Photometry, e.g. photographic exposure meter (22,989) |
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| 07/23/1991 | US5034606 Method and apparatus for calibrating line spectrum irradiance |
| 07/17/1991 | EP0436636A1 Sensor and method for measuring alcohol concentration in an alcohol-gasoline mixture |
| 07/17/1991 | CN2081085U Illuminometer |
| 07/16/1991 | US5032731 Sensor and device for the measurement of radiant energy, in particular the energy associated with radio-frequency, microwave and light radiation signals |
| 07/16/1991 | US5032713 Photosensing device and photosensing apparatus using a probe electrode |
| 07/16/1991 | US5032024 Optical examination apparatus |
| 07/16/1991 | US5031992 Multiple parallel channel rotary optical coupler |
| 07/11/1991 | WO1991010126A1 Device for measuring gas optical density |
| 07/11/1991 | WO1991010125A1 Device for measuring gas optical density |
| 07/11/1991 | WO1991010121A1 Optical time domain relfectometer |
| 07/11/1991 | WO1991010117A1 Process and device for measuring laser power |
| 07/09/1991 | US5030838 Quality inspection device for printed matter and method thereof |
| 07/09/1991 | US5030005 Liquid crystal device for calibration and testing of optical instruments |
| 07/04/1991 | DE3942293A1 Verfahren und vorrichtung zum messen von laserleistung A method and device for measuring laser power |
| 07/03/1991 | EP0435773A1 Image pick-up device with integrated deflection circuits |
| 07/03/1991 | EP0435397A1 Pyroelectric sensor element and devices for the detection of thermal phenomena |
| 07/02/1991 | US5029297 Optical amplifier-photodetector device |
| 07/02/1991 | US5029245 Procedure for controlling a radiation source and controllable radiation source |
| 07/02/1991 | US5028865 Device having main and secondary optical sensors |
| 07/02/1991 | US5028792 System for the visualization of exposure to ultraviolet radiation |
| 07/02/1991 | US5028135 Combined high spatial resolution and high total intensity selection optical train for laser spectroscopy |
| 06/27/1991 | WO1991009299A1 Apparatus and method for use in determining the optical transmission factor or density of a translucent element |
| 06/27/1991 | DE3941403A1 Measuring device for intensity of ultraviolet component in sunlight - takes account of individual skin tolerance entered via two-key input unit and shown display for sun protection selection |
| 06/26/1991 | EP0434567A1 Method for calibrating an optical instrument, and its applications |
| 06/26/1991 | EP0434371A2 Image reader |
| 06/26/1991 | EP0433698A2 Black body calibration using image processing techniques |
| 06/26/1991 | CN2079746U Light measuring alarm of protecting visual |
| 06/25/1991 | US5027195 Color detection and/or recognition apparatus |
| 06/25/1991 | US5026996 Line scanner |
| 06/25/1991 | US5026992 Spectral ratioing technique for NDIR gas analysis using a differential temperature source |
| 06/25/1991 | US5026991 Gaseous species absorption monitor |
| 06/25/1991 | US5026989 System for monitoring material dispensed onto a substrate |
| 06/19/1991 | EP0432977A2 Optical device for detecting modulation in a light beam |
| 06/19/1991 | CN2079355U Photosensitive thyristor of spectral distribution curve same with numan day sight curve |
| 06/18/1991 | US5025243 Change in electrical resistance of silicon carbide mono-filaments |
| 06/18/1991 | US5025169 Sensor in IC formation |
| 06/18/1991 | US5025146 Optical sensor line of amorphous or polycrystalline photoelectric material having a plurality of sensor elements |
| 06/18/1991 | US5024533 Radiation clinical thermometer |
| 06/18/1991 | CA1285044C Weather identification system |
| 06/13/1991 | DE4028922A1 Combustion process monitoring method - detecting changes in radiation spectrum intensity and interpreting results |
| 06/13/1991 | DE3940386A1 Film-like foil transmission measuring system - uses photodiode detectors whose outputs pass via controlled potentiometers and amplifiers to micro-controller |
| 06/12/1991 | EP0431686A2 Arrangement for reading photo or X-ray detectors |
| 06/11/1991 | US5023921 Method and a device for processing electric signals coming from the analysis of the line of an image |
| 06/11/1991 | US5023647 Automatic status discriminator |
| 06/11/1991 | US5023441 Method to measure the angle of incidence for radiation and a detector to carry out the method |
| 06/11/1991 | US5022765 Nulling optical bridge for contactless measurement of changes in reflectivity and/or transmissivity |
| 06/11/1991 | US5022725 Optical sensor |
| 06/07/1991 | WO1991008453A1 Atomic resonance filter detector employing inert buffer gas |
| 06/07/1991 | CA2046593A1 Atomic resonance filter detector employing inert buffer gas |
| 06/06/1991 | WO1991008552A1 A parallel processing network that corrects for light scattering in image scanners |
| 06/06/1991 | CA2070818A1 Parallel processing network that corrects for light scattering in image scanners |
| 06/05/1991 | WO1991007909A1 Infrared medical thermometer |
| 06/05/1991 | EP0430718A2 A streak camera |
| 06/05/1991 | EP0430661A2 Apparatus for detecting a change in light intensity |
| 06/05/1991 | EP0429810A2 A method and apparatus for collecting electromagnetic radiation |
| 06/05/1991 | EP0429652A1 High-frequency discharge-excited laser |
| 06/05/1991 | EP0429566A1 Radiation detector array using radiation sensitive bridges |
| 06/04/1991 | US5021668 Electro-optical middle ultra-violet sensors |
| 06/04/1991 | US5021660 Pyroelectric infrared detector and driving method therefor |
| 05/30/1991 | WO1991008452A1 Liquid crystal device for calibration and testing of optical instruments |
| 05/30/1991 | CA2072742A1 Liquid crystal device for calibration and testing of optical instruments |
| 05/29/1991 | EP0428667A1 Input screen for radiological image intensifier tube. |
| 05/29/1991 | EP0275302B1 Correlated sampling amplifier |
| 05/28/1991 | US5018872 Probe assembly for infrared thermometer |
| 05/22/1991 | EP0428345A2 A receiving head for a radiation detector having a defined field of view |
| 05/22/1991 | EP0278956B1 Apparatus for measuring properties of a laser emission |
| 05/21/1991 | US5017004 Multifunction electro-optical system test tool |
| 05/15/1991 | EP0426748A1 Electro-optical measuring instruments |
| 05/15/1991 | CN2077121U Detecting point prover of infrared search unit |
| 05/15/1991 | CN2077120U Multi-functional electronic photometric unit |
| 05/14/1991 | US5016073 Photodetector semiconductor which does not require extensive cooling |
| 05/14/1991 | US5015067 Optical fiber power output measuring means |
| 05/11/1991 | CA2029317A1 Flame detection |
| 05/08/1991 | EP0426117A2 A method for calibrating an optical attenuator |
| 05/08/1991 | EP0332656A4 Motion detector |
| 05/07/1991 | US5014216 Concentration determination with multiple wavelength flash photometers |
| 05/07/1991 | US5013919 Detector element signal comparator system |
| 05/07/1991 | CA1283968C Edge illuminated impurity band conduction detector arrays |
| 05/02/1991 | WO1991005989A1 Detector element signal comparator system |
| 05/02/1991 | EP0424651A1 Method and apparatus for unpiling pulses generated by piled-up scintillation events |
| 04/30/1991 | US5012102 Methods of producing vacuum devices and infrared detectors with a getter |
| 04/30/1991 | US5012097 Radiation measuring apparatus |
| 04/30/1991 | US5010827 Apparatus for detecting carryover particles in the interior of a furnace |
| 04/25/1991 | DE3943518A1 Wavefront detector for laser beam - contains collimating lens array and array of reflecting elements with pivot drive controlled for error compensation |
| 04/24/1991 | EP0423223A1 Method and apparatus for spectroscopic measurement of the concentration of a gaz. |
| 04/24/1991 | CN2075788U Dosimeter for ultraviolet radiation |
| 04/23/1991 | US5010359 Method and apparatus for photometry from plural points of automatic exposure camera |
| 04/23/1991 | US5010244 Method to detect radiation and measure its angle of incidence and a detector arrangement to carry out the method |
| 04/23/1991 | US5009488 Filter accessory for an imaging microspectrofluorimeter |
| 04/18/1991 | WO1991005280A1 Connecting device for a light guide to transmit optical radiation |
| 04/18/1991 | WO1991005228A1 Arrangement for measuring the power of optical radiation |
| 04/17/1991 | EP0422854A2 Optical amplifier-photodetector device |
| 04/17/1991 | EP0248903B1 Process and circuit for compensating changes in the parameters of an optical emitter and an optical receiver in an optical scanner |
| 04/17/1991 | CN2075339U New structure for lastr radiation detector |
| 04/16/1991 | US5008548 Personal UV radiometer |
| 04/16/1991 | US5008543 System for determining the position of at least one target by triangulation |
| 04/16/1991 | US5008541 Monolithic detection or infrared imaging structure and its production process |
| 04/16/1991 | US5008531 Pulsed light identifying system |
| 04/16/1991 | US5008526 Photodetector output coupling with low and high frequency outputs |
| 04/16/1991 | US5007717 Real time analyzer for pulsed laser systems |