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5910653 |
Shelf tag with ambient light detector
The present invention relates to an electronic shelf display device which includes an optical device and an ambient light detector circuitry. The electronic shelf display device includes an...
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5903247 |
Servo controlled liquid crystal windows
An apparatus for controlling the opacity of a liquid-crystal window, having a light emitter positioned adjacent to one side of the liquid-crystal window, a light detector positioned adjacent to the...
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5902994 |
Apparatus for calibrating a linear image sensor
Apparatus for calibrating a linear image sensor, includes a fluorescent light source, at least as long as the image sensor; a fixture for holding the light source parallel to the image sensor and...
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5902993 |
Image scanner for image inputting in computers, facsimiles word processor, and the like
It is an object of the invention to present an image scanner of high performance, high reliability, and low cost, capable of realizing high image quality of reading image and suited to small size,...
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5900621 |
Light transmitter having an automatic bias control circuit
In a light transmitter comprises an automatic bias control circuit which automatically controls a bias for an external modulator, a part of a light output/input signal of the external modulator is...
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5880456 |
Circuit provides a normalized position signal for lateral photoeffect position sensor
A circuit provides a normalized position signal in response to a position of an illuminated spot on a lateral effect photosensor. The photosensor provides a concurrent pair of analog signals. The...
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5856665 |
Arc lamp stabilization and intensity control for imaging microscopy
An operator independent image cytometer having a method for image segmentation. Image segmentation comprises the steps of filtering a digital image of a cellular specimen and thresholding the...
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5837996 |
Eye protection system wherein a low power laser controls a high power laser
A system for preventing damage to the eyes of a person being within a certain distance from a high-power laser, including a device for ascertaining the absence of a person within this range, and a...
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5834763 |
Low noise photon coupled circuit
A photon coupled circuit comprises a high quantum efficiency semiconductor light emitter (TDA) coupled with low photon losses to a high quantum efficiency semiconductor light detector (OLD). Bias...
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5834760 |
Method of adjusting depth-of-field in laser scanners by dynamically adjusting laser power
Methods of controlling the power level of a pulsed laser beam being used to scan barcodes and the like in order to increase the depth-of-field. The pulses may comprise a plurality of pulses above...
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5834750 |
Bar code scanning system for automatically maintaining constant the amplitude of light reflected from a bar code
A system for bar code reading and scanning is provided having automatic bar code signal size control. In the first embodiment of the system, a processor selects on successive scans of a bar code...
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5821527 |
Method and apparatus for exposure control in light-based measurement instruments
A method and apparatus for nearly instantaneous and wide dynamic range exposure control in light-based measurement instruments. The excess charge drained from a CCD array by anti-blooming circuitry...
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5822052 |
Method and apparatus for compensating illuminance error of a light source
A method and an apparatus for compensating illuminance error of a light source is adapted to be used in a transmission type scanner and utilizes the light signal directly transmitted from the light...
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5798523 |
Irradiating apparatus using a scanning light source for photodynamic treatment
An apparatus for irradiating a biological substance with a substantially uniform quantity of radiation energy comprises a radiation-generating device for producing radiation energy, a support...
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5798518 |
Medical laser calibration system and method
A fiber optics calibration system (10) incorporated into a laser surgical system (12). A laser light source (14) produces a light beam (16), a portion of which is directed by a first beam splitter...
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5797050 |
Selective glare reduction ocular for scenery with very bright objects
A real-time, optical, nonlinear attenuator device situated in the image plane of an ocular of special construction provides a highly sensitive, broad spectral band, selective, glare reduction...
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5786890 |
Optical output detector
An optical output detector suitable for detecting the output of a laser diode for emitting light in a constant direction. The front emitted light generated from the laser diode as a light emitter...
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5780843 |
Absolute optical frequency calibrator for a variable frequency optical source
Calibration of a variable frequency light source is performed by a control unit which has a knowledge of the known transmission pattern of an optical filter, such as gas cell or a calibrated...
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5777319 |
Method of rotationally aligning multispot diode lasers in raster output scanners
A method of accomplishing rotational alignment of laser arrays relative to an external optical axis is described. The method uses the laser polarization, which is oriented relative to the axis of...
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5778146 |
Light beam heating apparatus
In a light beam heating apparatus generating a light beam for heating a work, optical energy of the light beam is deteriorated as the lamp is used. The optical energy is controlled by detecting an...
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5763870 |
Method and system for operating a laser device employing an integral power-regulation sensor
A method and system of operating a laser device includes utilizing an integral power-regulation sensor of the laser device to detect energy back reflected from an object of interest and then using...
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5757425 |
Method and apparatus for independently calibrating light source and photosensor arrays
A method of calibrating an image sensor having an array of pixel sensor sites, and an area light source having a corresponding array of pixel emission sites, comprising the steps of: a....
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5753903 |
Method and system for controlling light intensity in a machine vision system
The intensity of each lamp which illuminates an object at an inspection station is controlled by controlling driving voltage applied to a power supply which supplies electrical power to the lamp. A...
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5754571 |
Tunable wavelength light source apparatus for stabilizing power intensity by using external auto-power control
To obtain a predetermined power intensity without influencing the wavelength of output light by external APC, a laser beam having a predetermined plane of polarization and output from a tunable...
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5747793 |
Variable light source compensated optical fiber sensing system
An analog, optical-fiber measuring system compensates for variations in the level of light attenuation occurring in the optical path of the measuring system. The analog, optical-fiber measuring...
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5744913 |
Fluorescent lamp apparatus with integral dimming control
Dimmable fluorescent lamp apparatus includes a dimming control element housed in an integral adapter having a base which installs directly on an existing incandescent or other lighting fixture. The...
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5739521 |
Laser diode controlling method and apparatus for compact disk drive
A laser diode controlling method for a compact disk drive in which light is radiated from a laser diode to a compact disk and a radio frequency (RF) signal is generated by the light reflected from...
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5734170 |
Driver for light emitting device
A light emitting device is operative for outputting a light beam having an intensity which increases as a drive current through the light emitting device increases. A power source is operative for...
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5726437 |
Light intensity control device
A light intensity control device includes light intensity balancing means for balancing the light intensities of the laser beams from the light emitting elements of the laser light source, and...
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5723856 |
Opto-electronic oscillator having a positive feedback with an open loop gain greater than one
An electro-optical oscillator includes an electro-optical modulator having an electrical input port that accepts an electrical control signal and an optical output port. The electro-optical...
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5717627 |
Optical memory device incorporating photodetector devices and light emitting devices
The optical memory device of the present invention comprises a photodetector device which generates a current when light is incident thereon and a light-emitting device which is connected to the...
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5717198 |
Pellicle reflectivity monitoring system having means for compensating for portions of light reflected by the pellicle
A pellicle reflectivity monitoring system comprising a radiation source for directing radiation through a pellicle to an object to be inspected, a sensor device positioned to receive the portion of...
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5714754 |
Remote zone operation of lighting systems for above-ground enclosed or semi-enclosed parking structures
A systemic method to control fluorescent and/or incandescent lighting fixtures located in or on an above ground, enclosed or partially enclosed, parking structure uniquely employing previously...
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5710589 |
Laser diode beam intensity regulation method and apparatus
A raster output scanner having a laser diode which generates a laser beam with a controlled beam intensity. The raster output scanner includes a time base generator which divides time into a...
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5705808 |
Flash tube devices with a controllable electrical energy
A flash device has a flash tube which generates light in response to electrical energy. The amount of light emitted by the flash tube is monitored by a circuit which is connected to means for...
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5701003 |
Intensity compensated scanning system
An intensity compensated scanning system includes laser means for providing a laser beam; scanner means for sweeping the laser beam in an arcuate path across a surface to be scanned; means for...
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5693931 |
Self-calibrating label gap sensor circuit with a current regulator
A label gap detection circuit comprises a photosensor having a light emitting element disposed at a first side of the print media and a light receiving element disposed at a second side of the...
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5679948 |
Constant luminescence source module for an automated analyzer
An analyzer for performing automated assay testing. The analyzer includes a storage and conveyor system for conveying cuvettes to an incubation or processing conveyor, a storage and selection...
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5663549 |
System for reading a symbol by activitating a liquid crystal device to control a scanning path
A bar code scanner employs an electronic means for causing the light beam to scan a bar code symbol, rather than using a mechanical device to generate the scan. A linear array of light sources,...
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5659414 |
Means for controlling the power output of laser diodes in a ROS system
The present invention provides a means and method for efficiently and automatically monitoring and adjusting the power output of either a single or a dual beam laser diode array used to provide the...
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5650843 |
Feedback control apparatus for a light integrating cavity
Feedback control of a spatially distributed light source for a light integrating cavity in which the light acceptance angle of the light feedback device is expanded by means of a light diffuser at...
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5644141 |
Apparatus and method for high-speed characterization of surfaces
This invention permits rapid determination of a three-dimensional contour of an object. The apparatus directs a laser beam onto a point on an object, and the scattered light is received by a...
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5640235 |
Photometric device and method
A photometric device includes a photoelectric conversion section to photoelectrically convert the light from an object, output circuits that output information from the photoelectric conversion...
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5635704 |
Self-adjusting optical sensing system for financial and retail printers
This invention features a sensing system and a method for dispensing financial and retail receipts from a receipt-printing machine. The sensing system of this invention can use any one of a myriad...
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5627362 |
Portable light source unit for simulating fires having an adjustable aperture
A portable, hand held light source unit is employed to check operation of fire detectors, such as hydrogen fire detectors. The unit emits radiation in a narrow band of wavelengths which are...
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5625196 |
Method and apparatus for monitoring/calibrating a process measuring system
A detector of a measuring system sensitive to light energy receives light from a process being measured and also from a separate light source which is modulated such that it can be detected in...
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5623139 |
CCD X-ray microdensitometer system
A system is disclosed for producing images representing radiation dose distributions in order to verify the radiation dose applied to a target area. The system uses a phantom assembly constructed...
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5621205 |
Photoelectric sensor having an enhanced dynamic range control circuit
The disclosed invention is a photoelectric sensor that is capable of resolving difficult low contrast sensing tasks by adjustment of the sensor's light source intensity, so as to prevent dark state...
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5610394 |
Rotation monitor disturbance neutralization system
A rotating surface optical sensing system having a radiation source controlled by a controlled current generator to emit electromagnetic radiation toward the rotating surface from which it can be...
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5602861 |
Laser lighting control device
A device suitable for a laser-type bar code reader used in a POS (point of sales) system in the distribution industry, and more particularly, to a laser lighting control device in a laser scanner...
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