| Patents for G01J 1 - Photometry, e.g. photographic exposure meter (22,989) |
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| 09/15/1981 | US4289406 Light transmission measurement method |
| 09/15/1981 | US4288922 Device to indicate solar exposure |
| 09/08/1981 | US4288161 Optical probe for detecting transitory and repetitive light signals |
| 09/01/1981 | US4286876 Apparatus and method for measuring scattering of light in particle detection systems |
| 09/01/1981 | CA1108266A1 Flame sensor |
| 08/25/1981 | US4285582 Light measuring apparatus |
| 08/18/1981 | US4284334 Circuit arrangement for the compensation of the temperature coefficient of semiconductor junctions |
| 08/11/1981 | US4283142 Two beam alternating light colorimeter |
| 08/11/1981 | CA1106641A2 Temperature sensing probe and disposable cover therefor |
| 08/05/1981 | EP0033253A2 Device for the photometrical measurement of complex solutions with varying background noise |
| 08/04/1981 | US4282430 Reflection-type photoelectric switching apparatus |
| 08/04/1981 | US4281932 Light absorptivity measuring device |
| 08/04/1981 | US4281897 Photometric system including a time-division optical attenuator |
| 07/29/1981 | EP0032852A2 System for processing and measuring signals delivered by each detector in a modulation spectrometer |
| 07/29/1981 | EP0032535A1 Device for the opto-electronic measurement of the area coverage of an offset printing plate or of a printed copy serving for the manufacture of the offset printing plate |
| 07/21/1981 | US4280075 Device for detecting and locating radiations, and in particular electron releasing phenomea |
| 07/21/1981 | US4280058 Flame detector |
| 07/21/1981 | US4279510 Spectrophotometer with improved photomultiplier tube dark signal compensation |
| 07/21/1981 | US4279507 Spatial scanning means for a photometer |
| 07/21/1981 | US4279254 Ultraviolet light control |
| 07/15/1981 | EP0031881A1 Device for the opto-electronic zonal measurement of the area coverage of a printing sheet |
| 06/30/1981 | US4276472 Detector for Q-switched laser radiation |
| 06/23/1981 | US4275295 Limit and measurement value transmitter |
| 06/23/1981 | US4274721 Metering device of a camera |
| 06/16/1981 | US4273999 Equi-visibility lighting control system |
| 06/09/1981 | US4272679 Ultraviolet radiation sensor |
| 06/09/1981 | US4272677 Method and apparatus for the automatic stabilization of drift in radiation measurements |
| 06/09/1981 | US4272197 Apparatus and method for measuring the ratio of two signals |
| 06/09/1981 | CA1102898A1 Ambient light compensating circuit |
| 05/26/1981 | CA1101772A1 Reusable radiation monitor |
| 05/20/1981 | EP0028603A1 Solarmeter |
| 05/19/1981 | CA1101515A1 Photodetector with improved signal-to-noise ratio |
| 05/05/1981 | US4265539 Device which measures the mutual coherence function of a laser beam |
| 04/28/1981 | US4264211 Light sensor |
| 04/28/1981 | US4264124 Polymer carriers containing fluorescent particles and polar organic additives |
| 04/21/1981 | US4262997 Exposure information indicating device |
| 04/14/1981 | US4262206 Fluorescent radiation converter |
| 04/14/1981 | US4261662 Method and apparatus for measuring the relative intensity of the beams emanating from a single laser |
| 04/07/1981 | US4260263 Process and apparatus for measuring the brightness of mill-comminuted products, especially flour |
| 04/07/1981 | US4260262 Grain quality analyzer |
| 04/07/1981 | US4260256 Apparatus for measuring illuminance |
| 04/07/1981 | US4260255 High energy laser beam sampling meter |
| 04/07/1981 | US4260251 Irradiance analyzer for high power lasers |
| 04/07/1981 | US4260219 Device for collecting light and method of manufacturing such device |
| 04/01/1981 | EP0026108A2 Apparatus, circuit and method for compensating the dark current of photoelectric transducers |
| 03/31/1981 | US4258993 Light discrimination apparatus |
| 03/31/1981 | CA1098615A1 Ferroelectric imaging system |
| 03/31/1981 | CA1098335A1 Optical temperature measurement technique utilizing phosphors |
| 03/24/1981 | US4258255 Infrared intrusion detection system |
| 03/24/1981 | US4258254 Imaging devices and systems |
| 03/24/1981 | CA1098222A1 Device for light flux attenuation, especially for additional quenching of scintillations at radionuclide activity determination |
| 03/19/1981 | WO1981000764A1 Hand-held digital temperature measuring instrument |
| 03/18/1981 | EP0025188A1 Optical arrangement for a photodetector |
| 03/10/1981 | US4255665 Wearable device for monitoring momentary presence of intense X-ray and/or ultra-violet radiations |
| 03/03/1981 | US4254332 Laser pulse detector |
| 03/03/1981 | US4253764 Solar energy metering and recording system |
| 02/24/1981 | US4252441 Arrangement for measuring exposure in photography with an electronic exposure meter and adapter |
| 02/24/1981 | US4252440 Photomechanical transducer |
| 02/19/1981 | WO1981000454A1 Process and device for searching the densimetric distribution of the lighting of a display |
| 02/11/1981 | EP0023709A1 System for controlling the exposure time of a photoresist layer |
| 02/10/1981 | US4250103 Radiographic apparatus and method for monitoring film exposure time |
| 02/03/1981 | US4249168 Flame detector |
| 02/03/1981 | US4249109 Light digitizing circuit for an electronic flash device |
| 02/03/1981 | US4248536 Dual wavelength photometric device |
| 01/27/1981 | US4247202 Automatic computing color meter |
| 01/27/1981 | US4247188 Automatic exposure camera |
| 01/27/1981 | US4247186 Photometric circuit for camera |
| 01/27/1981 | CA1094341A1 Sterilizable, disposable optical scattering reference medium |
| 01/21/1981 | EP0022524A1 Sensor-integrator system |
| 01/07/1981 | EP0021887A1 Optoelectric detection device, particularly for laser radiation |
| 01/07/1981 | EP0020751A1 Radiographic apparatus and method for monitoring film exposure time |
| 01/07/1981 | EP0020349A1 Supervision device with a passive optical detector for electrical arcs in a circuit-breaker. |
| 12/30/1980 | US4242581 Laser energy monitor |
| 12/23/1980 | US4241280 Light integrator circuit with built-in anticipation |
| 12/23/1980 | US4241258 Ultraviolet fire detector |
| 11/25/1980 | US4236076 Infrared analyzer |
| 11/25/1980 | US4236069 Avalanche photodiode gain control system |
| 11/18/1980 | US4234790 Photodetector heat stabilizer |
| 11/18/1980 | US4234789 Observation optical apparatus |
| 11/18/1980 | US4234255 Combined motor means and rotational cell |
| 11/13/1980 | WO1980002457A1 Solarmeter |
| 11/11/1980 | US4233504 Apparatus for detecting the passage of glowing embers |
| 11/04/1980 | CA1088772A1 Apparatus and process for rapidly characterizing and differentiating large cells |
| 10/21/1980 | CA1087894A1 Light discrimination apparatus measuring flicker ratios |
| 10/14/1980 | US4227808 Digital light measuring device |
| 10/07/1980 | CA1087286A1 Electromagnetic radiation detector with large area sensing medium |
| 09/30/1980 | US4225782 Wide field of view-narrow band detection system |
| 09/23/1980 | CA1086411A1 Phototransistor |
| 09/16/1980 | US4223271 Integrating circuit |
| 09/16/1980 | US4223215 Photodetector arrangements and circuits |
| 09/16/1980 | US4222665 Long-term meter-recorder for solar cell output power |
| 09/16/1980 | CA1085966A1 Multilayered slant-angle thin film energy detector |
| 09/02/1980 | US4220412 Illuminant discrimination apparatus and method |
| 08/20/1980 | EP0014375A2 Double-beam flicker colorimeter |
| 08/20/1980 | EP0014373A1 Optical sensor including a narrow band filter |
| 08/19/1980 | US4218140 Light meter |
| 08/19/1980 | US4218139 Solar energy device and method |
| 08/12/1980 | US4217026 Elliptic cylindrical baffle assembly |
| 07/29/1980 | US4214826 Method and device for controlling the exposure of a camera when photographing an object of which luminance is different on each surface section thereof |
| 07/15/1980 | US4212540 Testing the divergence of a beam from a laser |