| Patents for G01J 1 - Photometry, e.g. photographic exposure meter (22,989) |
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| 06/12/1990 | US4933542 High speed photodetector having dual transmission line geometry |
| 06/12/1990 | US4932789 Radiation clinical thermometer |
| 06/12/1990 | CA1270121A1 Silicone dielectric gel cryogenic detector interface |
| 06/06/1990 | EP0371868A1 Monolithic structure for an IR detector or IR imager, and method of manufacturing the same |
| 06/06/1990 | EP0371423A2 Plural arc radiation protector |
| 06/05/1990 | US4931827 Photometer for reproduction machine |
| 06/02/1990 | CA2004465A1 Method and apparatus for determining ambient light and surface reflectance |
| 05/31/1990 | WO1990005902A1 Probe assembly for infrared thermometer |
| 05/31/1990 | DE3839537A1 Method for measuring the rate of a radiation and arrangement for carrying out this method |
| 05/30/1990 | EP0370439A2 Resonant radiation protector |
| 05/29/1990 | US4929837 Method for detecting pinholes and incomplete coverage of hermetic coatings on optical fiber waveguides |
| 05/29/1990 | US4929824 light metering device with detector matrix and mean value detection |
| 05/29/1990 | US4929080 Apparatus for the optical measurement of spectra distribution |
| 05/23/1990 | DE3838820A1 Balancing the measuring and comparison light beam in light-electrical photometers |
| 05/22/1990 | US4928013 Temperature insensitive moisture sensor |
| 05/22/1990 | US4928012 System for measuring electromagnetic radiation originating from the hemisphere |
| 05/22/1990 | US4927266 Optical signal generating apparatus and optical power meter calibrating system using the same |
| 05/17/1990 | WO1990005322A1 Optical sensing apparatus and method |
| 05/16/1990 | EP0368588A2 Pyroelectric infrared detector and manufacturing method of same |
| 05/16/1990 | EP0368245A2 Cold shield for infrared detectors |
| 05/16/1990 | EP0235284B1 Integrated infrared detector and cryoengine assembly |
| 05/16/1990 | CN1008008B Light barrier |
| 05/15/1990 | US4926428 Method and apparatus for sensing the wavelength of a laser beam |
| 05/15/1990 | US4925299 For photometrically investigating substances |
| 05/09/1990 | EP0367108A2 Electrical interconnector for infrared detector arrays and method for its fabrication |
| 05/09/1990 | EP0366696A1 Procedure for controlling a radiation source and controllable radiation source. |
| 05/09/1990 | CN1042013A 光探测器 Photodetector |
| 05/08/1990 | US4924081 Photo-electric converter having offset voltage correcting function |
| 05/03/1990 | WO1990004775A1 Luminescence or fluorescence monitoring apparatus and method |
| 05/03/1990 | WO1990004763A1 Dewar cryopumping using molecular sieve |
| 05/02/1990 | EP0366244A1 Method and apparatus for combining an optical and electrical channel in an oscilloscope |
| 05/02/1990 | EP0366243A2 Combined optical power meter and receiver |
| 05/01/1990 | US4922116 Flicker free infrared simulator with resistor bridges |
| 05/01/1990 | US4922089 Constant color temperature and intensity illumination source |
| 05/01/1990 | US4921351 Spectrophotometer comprising a xenon flashtube as a light source |
| 05/01/1990 | CA1268526A1 Motion detector |
| 05/01/1990 | CA1268367A1 Optical beam integration system |
| 04/25/1990 | EP0365310A2 Colour detection and/or recognition apparatus |
| 04/25/1990 | EP0365294A2 Photometric apparatus employing solid-state imaging device |
| 04/25/1990 | EP0365095A2 Single photon semiconductor avalanche photodiode and active quenching circuit assembly |
| 04/25/1990 | EP0365047A2 Optical air pollution or smoke detection apparatus |
| 04/25/1990 | EP0364573A1 Electrochemically controlled superconductivity |
| 04/25/1990 | CN1007755B Dual spectra optical pyrometer having a serial array of photodetectors |
| 04/24/1990 | US4919535 Reflectance measuring apparatus for making contactless measurements |
| 04/24/1990 | US4919505 Infrared thermometer with fiber optic remote pickup |
| 04/24/1990 | US4919099 Combustion monitoring |
| 04/18/1990 | EP0364351A1 Method of photoelectric detection with reduction of accumulated charges in phototransistors, especially those of the nipin type |
| 04/18/1990 | EP0363520A1 A photoelectric sensor |
| 04/18/1990 | CN1041448A 分光光度计 Spectrophotometer |
| 04/17/1990 | US4918311 Set point control circuit for an infrared gas analyzer |
| 04/17/1990 | US4917500 Color sensor system for the recognition of objects with colored surfaces |
| 04/17/1990 | US4917489 Device for measuring size of light spot |
| 04/11/1990 | EP0362562A2 Spectrometer for the simultaneous measurement of intensity in several spectral ranges |
| 04/10/1990 | US4916543 Circular scan streak tube with electronic memory and readout |
| 04/10/1990 | US4916406 Automatic gain control circuit |
| 04/10/1990 | US4916319 Beam intensity profilometer |
| 04/10/1990 | US4916307 Light intensity detecting circuit with dark current compensation |
| 04/10/1990 | US4916305 Optical detectors with selective bias voltage application |
| 04/10/1990 | US4915500 Multichannel optical sensing device |
| 04/10/1990 | EP0253872A4 Infrared gas analyzer with automatic zero adjustment. |
| 04/10/1990 | CA1267547A1 Breath tester |
| 04/05/1990 | WO1990003565A1 Sensor and method for measuring alcohol concentration in an alcohol-gasoline mixture |
| 04/05/1990 | WO1990003556A1 Improvements in and relating to pyroelectric detectors |
| 04/04/1990 | EP0361374A2 Light-detecting device |
| 04/04/1990 | EP0361311A2 Spectrophotometer |
| 04/04/1990 | EP0361064A2 Optical spectrum analyzer with high performance measurement function |
| 04/04/1990 | EP0361000A2 Optical line sensor with a plurality of sensitive elements, made of a photoelectric material with a polycrystalline or amorphous structure |
| 04/04/1990 | EP0360877A1 Circuitry to determine the optical power of a signal |
| 04/03/1990 | US4914738 Apparatus for discriminating light source having spectrum peaks |
| 04/03/1990 | US4914494 Avalanche photodiode with central zone in active and absorptive layers |
| 04/03/1990 | US4914468 Light measuring device |
| 04/03/1990 | US4914299 Glass cold shield |
| 04/03/1990 | US4914284 Optical wide angle sensor head |
| 03/27/1990 | US4912529 Apparatus and method to compensate for refraction of radiation |
| 03/27/1990 | US4912319 Detector device for mixing ratio for gasoline and alcohol or the like |
| 03/27/1990 | US4911800 Electrochemically controlled superconductivity |
| 03/22/1990 | WO1990002971A1 Linear integrating cavity ligth source |
| 03/22/1990 | WO1990002970A1 Intensity stabilized light source |
| 03/22/1990 | WO1990001692A3 Electro-optical measuring instruments |
| 03/21/1990 | EP0358818A1 Reflective photometry instrument |
| 03/21/1990 | CN1040679A Method for measuring fast optical event and apparatus therefor |
| 03/20/1990 | US4910570 Photo-detector for ultraviolet and process for its production |
| 03/20/1990 | US4909633 Multi-channel spectral light measuring device |
| 03/20/1990 | US4909626 Electrically-controllable thin film Fresnel zone device |
| 03/14/1990 | EP0358575A2 On-line paper sheet formation characterizing method and device |
| 03/14/1990 | EP0358436A2 Infrared detection element |
| 03/14/1990 | EP0357713A1 Optical thresholding apparatus and method. |
| 03/13/1990 | US4907887 High resolution interferometer with high etendue |
| 03/08/1990 | WO1989012806A3 Apparatus for measuring the radiated power of lasers |
| 03/07/1990 | EP0357555A2 Photometer, especially for measuring glaze light intensity |
| 03/07/1990 | EP0357002A2 Pyroelectric infrared sensor |
| 03/07/1990 | EP0356517A1 Pyroelectric infrared sensor |
| 03/06/1990 | US4906849 Laser radiation detector using polyvinylidene fluoride film |
| 03/06/1990 | US4906836 Integrated circuit using logarithmic amplifier |
| 03/06/1990 | US4906835 Light sensing and emitting devices with a safelight |
| 03/06/1990 | US4906834 Infrared detector circuit having a resistor series connected to the detector to limit the current across the pn junction of the FET |
| 02/28/1990 | EP0356273A1 Main and secondary optical sensor device |
| 02/28/1990 | EP0356034A2 Optical sensor |
| 02/28/1990 | EP0355310A2 System for the recognition of the start and approach of objects |
| 02/28/1990 | EP0355174A1 Photodiode array spectrometer |