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