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| Number | Title | Issue Date |
| 8189182 | Semiconductor integrated circuit device, optical scanner using same, image forming apparatus using optical scanner, and return light identification method A semiconductor integrated circuit device controlling a first light amount of light emitted from a light source based on a second light amount of light entering a light amount detection part so that the first light amount becomes a target level is disclosed. The sem... | 05/29/2012 |
| 6969843 | Light standard for microscopy The disclosed light standard system provides flat field illumination through the use of an integrating light chamber which is in communication with a microprocessor. The light chamber has at least one high performance light source, such as LED's, recessed within the... | 11/29/2005 |
| 6956203 | Scanning system with calibrated detection and method A self-calibrating scanning system and method are used in the analysis of biomolecules on a microarray. The self-calibrating scanning system comprises an excitation light source, an optical portion, a detection portion and a calibration portion that includes a calib... | 10/18/2005 |
| 6909499 | Light source for illumination in an optical viewing device The invention concerns a light source having an apparatus for measuring the brightness of the illumination system of an optical viewing device, for example a microscope, in which at least one light sensor (3a) for measuring the intensity of the lamp ( | 06/21/2005 |
| 6656518 | Thin film forming method and apparatus To provide a thin film forming method and apparatus that can automatically form thin films having constant optical properties with high reproducibility Antireflection films are deposited on lenses 2a that are held by a coating dome 2 by vaporizing an evap... | 12/02/2003 |
| 6481369 | Thin film forming method and apparatus To provide a thin film forming method and apparatus that can automatically form thin films having constant optical properties with high reproducibility. Antireflection films are deposited on lenses 2a that are held by a coating dome 2 by vaporizing an eva... | 11/19/2002 |
| 6294785 | Infrared sensor response calibration using atmospheric limb emission measurements A method is presented for calibrating an infrared sensing device while in an orbit above a celestial body. The infrared sensing device measures a signal profile proportional to radiance emission from the atmospheric limb region in each of a plurality of s... | 09/25/2001 |
| 6016192 | External calibration system for a photo multiplier tube An external calibration system for a photo multiplier tube is described. The calibration system uses a light emitting diode and a photo cell wherein the diode is domed shaped. The light sensitive face of the photo multiplier tube is contained in the plane... | 01/18/2000 |
| 6014207 | Vehicle lighting unit When a vehicle enters into the lower portion of a shielding member, a headlamp is switched on, and a condition flag is set to Set 1 which represents a waiting state in which the vehicle exterior is estimated to become bright/dark intermittently. When the ... | 01/11/2000 |
| 5991014 | Light sensing device for sensing the light output of a bulb A light sensing device for sensing the light output of a bulb in a lamp comprises a fiber-optic light guide having first and second ends and a photodetector. The first end is optically coupled to a projection of a bulb in the lamp and is adapted to pick u... | 11/23/1999 |
| 5946086 | Optical mean power controller with provisionable output levels A mean optical power controller that controls power using a voltage controlled optical attenuator (VCOA) is disclosed. This controller uses a control loop in which a signal indicative of the present optical power level is compared to a signal indicative o... | 08/31/1999 |
| 5715048 | Calibration system for a photo multiplier tube A calibration system for a measuring device utilizing a photo multiplier tube is provided. The calibration system is intended to provide a stable light source variable over a wide range of intensities which can be used to calibrate the PMT reading using a... | 02/03/1998 |
| 5715049 | Light measuring apparatus for quantifying photons When incident light is incident to a photodetector, photoelectrons are emitted therefrom and then multiplied to output an electric current signal. This current signal is integrated over a predetermined period of time in an integrator to be converted to a ... | 02/03/1998 |
| 5643535 | Luminometer with reduced sample crosstalk A luminometer is described comprising a tray for receiving an array of sample wells, a photodetector assembly, and means for relatively moving the tray and photodetector assembly in one direction to align the sample wells received by the tray in a predete... | 07/01/1997 |
| 5418419 | Lamp for producing a daylight spectrum A lamp for producing a spectral distribution which is substantially identical to daylight color temperature. The lamp contains a filament which, when excited by electrical energy, emits radiant energy at least within the visible spectrum with wavelengths ... | 05/23/1995 |
| 5325171 | System for calibration of optical instrument on satellite with reference light source A calibration system for periodically calibrating an optical instrument on board a satellite with reference light. In the disclosed system, a calibration unit has two photodetectors one of which is positioned near the light source which radiates reference... | 06/28/1994 |
| 5060118 | Apparatus for daylight color duplication An apparatus for "color mode switching," which enables duplication of daylight chromaticity for each color family. The present invention emits a selected spectral distribution of light which duplicates the effect of daylight, on a color-by-color basis. Th... | 10/22/1991 |
| 4712089 | All-optical A/D conversion using integrated nonlinear guided wave optical circuitry Methods and apparatus for all-optical analog to digital conversion. An analog optical input signal is directed along a path comprising a series of level sensing means for determining whether its intensity is above or below a threshold value. The optical s... | 12/08/1987 |
| 4708477 | Photometer A photometrical apparatus has a first light receiving element, and a second light receiving element less sensitive to temperature and other environmental influences than said first light receiving element whereby a value Pm of measured quantity of light f... | 11/24/1987 |
| 4636072 | Method and apparatus for improved photometric testing of high intensity discharge lamps and luminaires An improved method and apparatus for use in photometric testing of high intensity discharge lamps and luminaires is disclosed. The improved apparatus includes the creation of a mock high intensity discharge lamp having an incandescent emitting element rep... | 01/13/1987 |
| 4543558 | Method and apparatus for converting radiant energy levels to digital data A method and apparatus for converting radiant energy levels to digital data wherein an image sensor is provided having at least one row of sensor elements each including a light sensitive capacitor and an access switch and which changes state produces a c... | 09/24/1985 |
| 4538218 | Skylight sensor and control system A lighting control system is provided which utilizes a light responsive sensor means and a control system to respond to the skylight illumination while rejecting direct sunlight as a control parameter. The skylight illumination level is used to control li... | 08/27/1985 |
| 4537510 | Output control device for light detectors for photometers Apparatus for controlling output signals from two light detectors in a photometer. The sensitivities of the light detectors, or the gains in amplifiers for amplifying output signals from the light detectors are controlled in such a manner that the sensiti... | 08/27/1985 |
| 4516852 | Method and apparatus for measuring intensity variation in a light source This invention relates to a method and apparatus for measuring the exposure variation in the cross scan direction in an optical projector and scanning apparatus of the type that uses an annular aperture or slit. This measuring is achieved by measuring the... | 05/14/1985 |
| 4418399 | Semiconductor memory system A semiconductor memory system providing memory matrix area where many word lines and bit lines cross in the row and column directions. Memory cells are arranged at the intersections resulting in high integration density. A plurality of peripheral circuit ... | 11/29/1983 |
| 4023910 | Electronic photometer with two variable indicators There is disclosed an evaluating circuit for use with a photoelectric transducer and an electronic photometer. The photometer comprises indicators, all of which are variable, and comprises a combining device arranged to combine by an inverse computing ope... | 05/17/1977 |
| 3938896 | Image colorimeter A colorimeter includes an objective for focusing an object image on a first half of a viewing screen. A standard light reference beam is projected onto the second half of the screen. A moving shutter alternately blocks the first half then the second half ... | 02/17/1976 |
