| Patents for G01J 1 - Photometry, e.g. photographic exposure meter (22,989) |
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| 10/18/1989 | EP0337692A2 A pyroelectric infrared sensor and a method of manufacturing a dual pyroelectric element used therein |
| 10/18/1989 | EP0337557A1 Circuit for a light-sensitive element |
| 10/17/1989 | US4875029 Suppressed transient uniform detection sensitivity pir detector |
| 10/17/1989 | US4874939 Method and apparatus for detecting position/variance of input light using linear and quadratic outputs |
| 10/17/1989 | US4874572 Method of and apparatus for measuring vapor density |
| 10/11/1989 | EP0336235A2 Light identifying system |
| 10/11/1989 | EP0335915A1 Solution loading analyzer |
| 10/10/1989 | US4873546 Color printing method and apparatus |
| 10/10/1989 | US4873433 Electromagnetic radiation detecting device with hollow semicylindrical chopper |
| 10/05/1989 | WO1989009392A1 Fluid pollution monitor |
| 10/03/1989 | US4871250 Beam monitor for a high-output laser |
| 09/28/1989 | DE3808445A1 Sensor system for gases and vapours |
| 09/27/1989 | EP0334403A1 Single frequency adapter for laser |
| 09/27/1989 | EP0333751A1 Avalanche photodiode quenching circuit. |
| 09/27/1989 | CN1035892A Pyroelectric infra-red detectors and their method of manufacture |
| 09/26/1989 | US4870443 Photometric device |
| 09/26/1989 | US4870350 Electrical signal observing device |
| 09/26/1989 | US4870264 Device for optically measuring the shading of translucent panes |
| 09/26/1989 | CA1260065A1 Method of and apparatus for measuring the transverse moments of the electromagnetic field associated with an optical beam |
| 09/21/1989 | DE3905348A1 Arrangement for measuring the irradiation power occurring in a laser scanning microscope or the light power reflected and diffusely scattered on the irradiated object or the difference between the two powers |
| 09/20/1989 | EP0333424A2 Suntanning gauge |
| 09/20/1989 | EP0332699A1 Method and apparatus for detecting the wavelength of a laser beam |
| 09/20/1989 | EP0332656A1 Motion detector |
| 09/20/1989 | CN1035719A Detective device and technique of ultra-weak light |
| 09/19/1989 | US4868902 GaAs capacitive feedback transimpedance amplifier |
| 09/19/1989 | US4868573 Line frequency slaved voltage-to-frequency converter system |
| 09/19/1989 | US4868383 Linear integrating cavity light source used for generating an intense beam of light |
| 09/19/1989 | US4868380 Optical waveguide photocathode |
| 09/19/1989 | US4868378 Device for locating the source of coherent light through a turbulent medium |
| 09/19/1989 | US4867556 Apparatus for determining the path of a pulsed light beam |
| 09/13/1989 | EP0332293A2 Apparatus for measuring speed |
| 09/13/1989 | EP0331719A1 Light detector and signal processing circuit |
| 09/13/1989 | EP0234962B1 Reflective screen, its process of manufacture and its application in a thermal insulation device |
| 09/12/1989 | US4865446 Laser power and energy meter |
| 09/08/1989 | WO1989008224A1 Luminescent fiber marker-detector |
| 09/06/1989 | EP0331252A2 Pyroelectric infra-red detectors and their method of manufacture |
| 09/05/1989 | US4864345 Distance measuring and light measuring optical system |
| 09/05/1989 | US4864120 Electronic correction of photodiode radiant sensitivity |
| 09/05/1989 | US4863282 Sun heat radiation sensor |
| 09/05/1989 | US4863265 Apparatus and method for measuring blood constituents |
| 08/30/1989 | EP0330501A2 Measurement arrangement with automatic gain control circuit |
| 08/29/1989 | US4861164 Apparatus for separating specular from diffuse radiation |
| 08/24/1989 | DE3804380A1 Method for protecting IR-detectors against laser radiation |
| 08/23/1989 | EP0329547A1 Digitally controlled electronic streak camera for the investigation of very short phenomena |
| 08/23/1989 | EP0329061A2 A dual beam multichannel spectrophotometer with a unique logarithmic data converter |
| 08/23/1989 | EP0328636A1 Variable phase time delay and signal aggregation system and method for achieving constant spatial resolution in scanning detection instruments |
| 08/22/1989 | US4859935 Method and apparatus for combining an optical and electrical channel in an oscilloscope |
| 08/22/1989 | US4859861 Measuring curvature of transparent or translucent material |
| 08/22/1989 | US4859859 Gas analyzers |
| 08/22/1989 | US4859063 Imaging microspectrofluorimeter |
| 08/17/1989 | DE3803840A1 Photometer |
| 08/15/1989 | US4856906 Enhanced system for transmission loss comparison |
| 08/10/1989 | WO1989007365A1 GaAs CAPACITIVE FEEDBACK TRANSIMPEDANCE AMPLIFIER |
| 08/09/1989 | EP0326603A1 Optical detection system |
| 08/08/1989 | US4856093 Optical heterodyne receiver |
| 08/08/1989 | US4855718 Fire detection system employing at least one optical waveguide |
| 08/03/1989 | DE3802115A1 Rotating mirror system for measuring light |
| 08/02/1989 | EP0326341A2 Optical detection and control system |
| 08/02/1989 | EP0325863A2 Multi-color ultraviolet radiation measurement device |
| 08/02/1989 | CN2042190U Electronic photometer |
| 08/01/1989 | US4853538 Radiation detector arrangements and methods |
| 07/27/1989 | WO1989006819A1 Optical thresholding apparatus and method |
| 07/27/1989 | WO1989006786A1 Optical power meter |
| 07/27/1989 | DE3902028A1 UV-sensor |
| 07/26/1989 | EP0325382A1 Optical power meter |
| 07/26/1989 | CN1034271A Sensitivity enhanced screen made of compound lead for industrial x-ray fault detection |
| 07/25/1989 | US4851696 Apparatus for receiving radiation only within predetermined angular limits |
| 07/25/1989 | US4851689 Photodetecting circuit |
| 07/25/1989 | US4851686 Ultraviolet radiation monitoring device |
| 07/25/1989 | US4851685 Device for measuring UV-radiation |
| 07/25/1989 | US4851682 Heat resistance, sensitivity |
| 07/25/1989 | US4851664 Narrow band and wide angle hemispherical interference optical filter |
| 07/25/1989 | US4851658 Color sensor having improved uniformity of sensitivity |
| 07/18/1989 | US4849635 Intruder perceiving apparatus by means of infrared detection |
| 07/18/1989 | US4848904 Dual beam multichannel spectrophotometer with a unique logarithmic data converter |
| 07/18/1989 | US4848902 Device for measuring the intensity profile of a laser beam |
| 07/13/1989 | WO1989006347A1 Multi-color ultraviolet radiation measurement device |
| 07/12/1989 | CN2041037U Ultraviolet illumination metrical device |
| 07/12/1989 | CN2041036U Demultiplication photometric device |
| 07/11/1989 | US4847483 Device for measuring light intensity received by a photosensor |
| 07/11/1989 | US4846559 Sensor element with a memory for abnormal changes of the incident light intensity |
| 07/11/1989 | CA1257364A1 Position-sensitive radiation detector |
| 07/05/1989 | EP0323266A2 Suppressed transient uniform detection sensitivity pir detector |
| 07/05/1989 | EP0322454A1 Analog-digital correlator |
| 07/04/1989 | US4845647 Method and apparatus for determining temperature in a blackbody radiation sensing system |
| 07/04/1989 | US4843874 Method of checking the workmanship of paint coating |
| 06/29/1989 | WO1989005956A1 Laser heterodyne techniques |
| 06/27/1989 | US4843419 Light quantity measuring system |
| 06/27/1989 | US4842407 Apparatus for imaging an object on an electrooptical transducer |
| 06/27/1989 | US4842404 Dual detector laser beam power monitor |
| 06/21/1989 | EP0321051A2 Pyroelectric infrared sensors |
| 06/20/1989 | US4841156 Measurement of the thickness of thin films |
| 06/20/1989 | US4841144 Dust-proof tube having a cylindrical portion that seals photosensor and integrally formed frustrum portion |
| 06/14/1989 | EP0319887A2 Method and apparatus for analyzing fluids by multi-fluid modulation modes |
| 06/14/1989 | EP0319874A2 Cold shield for infrared detectors |
| 06/14/1989 | EP0319769A1 Colour-sensing device for identifying objects with a coloured surface |
| 06/14/1989 | CN2039413U Membrane thermoelectric radiometer |
| 06/13/1989 | US4839685 Light receiving element for a rangefinder |
| 06/13/1989 | US4838698 Extinction type detector |
| 06/13/1989 | US4838032 Optical signal power measurement method and apparatus |