| Patents for G01J 1 - Photometry, e.g. photographic exposure meter (22,989) |
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| 09/16/1990 | CA2012148A1 Infrared spectrometer |
| 09/13/1990 | DE3941726A1 Raster microscopic recording of fluorescence decay time - by measuring amplitudes of DC and HF modulated components of fluorescent light stimulated by modulated laser beam |
| 09/13/1990 | CA2010165A1 Compact semi-programmable device for reading reagent test strips and method relating thereto |
| 09/12/1990 | EP0386608A1 Device for modulating beams in the light path of photometric analysers |
| 09/11/1990 | US4956554 Pyroelectric infra-red detectors and their method of manufacture |
| 09/11/1990 | US4955946 Respiratory CO2 detector circuit with high quality waveform |
| 09/05/1990 | EP0385803A2 An optical element device |
| 09/05/1990 | EP0385256A2 Two-wavelength type respiratory gas concentration measuring apparatus |
| 09/05/1990 | EP0385135A1 Position-sensitive photodetector |
| 09/05/1990 | EP0294379A4 Purge air system for a combustion instrument |
| 09/04/1990 | US4954972 Color signature sensor |
| 09/04/1990 | US4953976 Gas species monitor system |
| 08/29/1990 | EP0384564A1 Photosensing device based on tunnel effect |
| 08/29/1990 | EP0384377A2 Optical sensing system |
| 08/29/1990 | EP0384298A2 Gas analyzer |
| 08/29/1990 | EP0165312B1 Pre-amplifier in focal plane detector array |
| 08/29/1990 | CN2061299U Incident / reflecting type electronic light meter |
| 08/29/1990 | CN1009392B Sensitivity enhanced screen made of compound lead for industrial x-ray fanlt detection |
| 08/28/1990 | US4952808 Thermal radiation detection apparatus |
| 08/28/1990 | US4952796 Light detection circuit having a junction reverse-biased by a current generator |
| 08/28/1990 | US4952788 Method of photoelectric detection with reduction of remanence of a phototransistor, notably of the NIPIN type |
| 08/25/1990 | WO1990010201A1 Sun exposure monitoring device |
| 08/25/1990 | CA2047734A1 Sun exposure monitoring device |
| 08/23/1990 | WO1990009602A1 Reservoir fiber optic chemical sensors |
| 08/22/1990 | EP0383390A1 Optical coherent receiver |
| 08/22/1990 | EP0383072A2 Method and device for the measurement of the absorption of radiation through a medium |
| 08/21/1990 | US4951106 Detector device for measuring the intensity of electromagnetic radiation |
| 08/21/1990 | US4951082 Three-dimensional multi-pattern photo-metering apparatus |
| 08/21/1990 | US4951077 Methods and device for measuring the brightness of an object |
| 08/21/1990 | US4950421 Dewar cryopumping using molecular sieve |
| 08/17/1990 | CA2010015A1 Optical coherent receiver |
| 08/17/1990 | CA2009983A1 Reservoir fiber optic chemical sensors |
| 08/16/1990 | EP0381883A1 Optical examination apparatus |
| 08/16/1990 | DE3903943A1 Method and devices for examining the relative radiation flux density of electromagnetic beams, especially for determining the radius of Gaussian laser beams |
| 08/14/1990 | US4948249 Headlight aiming and light pattern testing apparatus and method |
| 08/09/1990 | WO1990008946A1 Optical detection apparatus for counting optical photons |
| 08/08/1990 | EP0381148A1 Optical calorimeter system for executing real and short time calorimetric measurement of optical power |
| 08/08/1990 | CN1044531A Photoelectric detector with internal modulation and indirect coupling |
| 08/07/1990 | US4947400 Semiconductor apparatus |
| 08/07/1990 | US4947044 Method and apparatus for covertly viewing a target using infrared radiation |
| 08/07/1990 | US4947032 Detection circuit for a light-sensitive element which is substantially insusceptible to ambient light level |
| 08/01/1990 | EP0379671A2 Noise reduction for photodiode arrays |
| 07/31/1990 | US4945416 Ultra-rapid electronic camera |
| 07/31/1990 | US4945378 Circuit for detecting back light |
| 07/31/1990 | US4945244 Electronic infrared detector |
| 07/31/1990 | US4945227 Avalanche photodiode quenching circuit |
| 07/31/1990 | US4945225 Signal discriminator |
| 07/31/1990 | US4945224 Optical waveform observing apparatus |
| 07/31/1990 | US4944155 Vacuum separator for dewar flask cold exchange systems |
| 07/26/1990 | WO1990008415A1 High-frequency discharge-excited laser |
| 07/26/1990 | WO1990008337A1 Infrared thermometer with fiber optic remote pickup and method |
| 07/25/1990 | EP0379425A1 System for determining the position of at least one target by means of triangulation |
| 07/25/1990 | EP0379281A2 Web inspecting method and apparatus |
| 07/25/1990 | EP0378817A1 Sensor and device for the measurement of radiant energy, in particular the energy associated with radio-frequency, microwave and light radiation signals |
| 07/24/1990 | US4943142 Imaging microspectrofluorimeter |
| 07/18/1990 | EP0378324A2 Circular scan streak tube with electronic memory and readout |
| 07/18/1990 | EP0378283A2 Quality inspection device for printed matter and method thereof |
| 07/17/1990 | US4942618 Method and apparatus for determining the shape of wire or like article |
| 07/17/1990 | US4942305 For detecting particles in a gas stream |
| 07/17/1990 | US4942301 Thermal imaging device |
| 07/17/1990 | US4942292 Apparatus for following sun light |
| 07/17/1990 | CA1271822A1 Optical apparatus and method for examining an object |
| 07/17/1990 | CA1271820A1 Method and apparatus for testing the operability of a probe |
| 07/12/1990 | WO1990007697A1 Dual fiber optic spectrophotometer |
| 07/10/1990 | US4941012 Finder optical system for cameras |
| 07/10/1990 | US4940897 Single crystals of lithium tantalate dispersed in glass binder |
| 07/10/1990 | US4940328 For sensing a property of an environment |
| 07/04/1990 | EP0376125A2 Infrared detector |
| 07/04/1990 | EP0375744A1 A method to measure the angle of incidence for radiation and a detector to carry out the method. |
| 07/04/1990 | CN1008654B Reflectance mask, its method of produce and its application in thermal insulation apparatus |
| 07/03/1990 | US4939561 Infrared sensor |
| 07/03/1990 | US4939376 Light collection device for flame emission detectors |
| 07/03/1990 | US4938602 Automated process monitoring |
| 06/28/1990 | WO1990007102A1 Sensor for an air-conditioning system in a vehicle |
| 06/27/1990 | EP0375097A2 Stereolithographic beam profiling |
| 06/27/1990 | EP0374767A1 Light beam detection utilizing hologram |
| 06/26/1990 | USRE33241 Device for measuring extremely diminished intensity of light |
| 06/26/1990 | US4937611 Light metering device |
| 06/26/1990 | US4937455 Position-sensitive director |
| 06/26/1990 | US4937454 Radiation detector |
| 06/26/1990 | US4937449 Device for the inspection of coated and uncoated films |
| 06/26/1990 | US4937443 Photoelectric ambient light switch with ambient light sensing means |
| 06/26/1990 | US4937441 Diagnosis apparatus for photo coupler and photo coupler device with diagnosis function |
| 06/20/1990 | EP0374034A2 A standard substance for optical calibration and method of making same |
| 06/20/1990 | CN2058483U Faint light detector |
| 06/19/1990 | US4935631 Radiation meters |
| 06/19/1990 | US4935630 Lens-sphere optical sensing system |
| 06/19/1990 | US4935618 Wide bandwidth photoelectric converting circuit |
| 06/19/1990 | US4935613 Light projecting type distance measuring apparatus |
| 06/19/1990 | US4934819 Apparatus for measuring transverse moment of an electromagnetic field associated with an optical beam |
| 06/19/1990 | US4934812 Light detector |
| 06/14/1990 | WO1990006499A1 Luminosity and temperature detector for internal combustion engine |
| 06/14/1990 | WO1990006495A1 Thermal ir detector electrode configuration |
| 06/13/1990 | EP0372494A2 Constant color temperature and intensity illumination source |
| 06/13/1990 | DE3841244A1 Device for measuring the intensity profile of an infrared laser beam |
| 06/13/1990 | CN1008400B Optical detector storage effects reduction |
| 06/12/1990 | US4933560 Pyroelectric infrared sensors |
| 06/12/1990 | US4933559 Pyroelectric infrared sensor |
| 06/12/1990 | US4933550 Photodetector system with controllable position-dependent sensitivity |
| 06/12/1990 | US4933543 Dark signal compensation for diode arrays |