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6710321 |
Display image quality measuring system
The display image quality measuring system includes a image pickup device with a photographing condition, a gradation characteristic and a dark level being known, a control device for instructing a...
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6642503 |
Time domain sensing technique and system architecture for image sensor
A photodiode sensor ( 25 ) has a photodiode ( 30 ) with an associated capacitance ( 34 ), which may be a parasitic capacitance of the photodiode ( 30 ). A switch ( 36 ) is provided for charging the...
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6567160 |
Light measuring apparatus and light measuring method
A light measuring apparatus is provided with a photoelectric conversion element for converting a light energy to an electrical signal, a calculation circuit for calculating a measurement value...
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6529281 |
Position sensitive detectors and distance measuring apparatus using them
In an apparatus a photosensitve surface of PSD is provided with a conductive trunk region extending in a base line direction and a plurality of conductive branch regions arranged in the base line...
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6414295 |
Image-sensing device and signal processing method in an image-sensing device
In an image-sensing device, the output of an area sensor 1 obtained as an electric signal logarithmically proportional to the amount of incident light is converted by a conversion circuit 3 ...
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6180936 |
Photoreceptor arrangement for receiving light beams having coupling elements
The photoreceptor arrangement has at least two photoreceptors (P) with which light rays are registered and converted into electrical signals. The photoreceptors (P) are coupled to one another,...
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6058270 |
Photometric device and camera having the photometric device
A low cost, low power photometric circuit suitable for use in a low end camera includes a first counter for counting successive pulses produced by a first oscillator having a substantially constant...
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6029014 |
Light measuring apparatus and camera using the light measuring apparatus
A light measuring apparatus comprises an oscillation circuit, a first delaying circuit for delaying an output waveform of the oscillation circuit in accordance with a peripheral brightness, a...
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5969338 |
Light-received position detecting circuit and distance detecting apparatus using the same
A light-received position detecting circuit includes a light receiving portion 10 formed by plural photodiodes arranged side by side for detecting light to generate a photoelectric current, and a...
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5838425 |
Exposure control for the photographic recording of a microscope image
An exposure control system for the photographic recording of a microscope image comprises a two dimensional photographic receiver arrangement for detecting the image brightness of the microscope...
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5777728 |
Light meter
A light meter comprising: a light sensitive charge storage array having at least one charge storage cell, and reading circuit means connected to said array for generating a light reading from...
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5705807 |
Photo detecting apparatus for detecting reflected light from an object and excluding an external light componet from the reflected light
There is provided a photosensor having a photoelectric converter for converting incident light into a photoelectric current, and a function of removing noise light from imaging light including...
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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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5665960 |
Photoelectric converter device and method of manufacturing the same
A photoelectric converter device having improved residual image characteristics and composed of a transistor having a control electrode region made of a semiconductor of a first conductivity type...
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5631458 |
Range finder
In a range finder, a capacitor for light emission is charged by turning off first and second switching elements and turning on third and fourth switching elements before light is emitted from a...
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5581078 |
Ballistic optical camera trigger
A ballistic optical camera trigger having an integrated circuit capable of onverting light to a proportional frequency, wherein the integrated circuit has a fast response time and a wide dynamic...
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5548398 |
Illuminant discriminator providing detection of high efficiency illumination
An illuminant discriminator distinguishes a range of separate illuminants, including high efficiency fluorescent lighting, by modifying the frequency response of a signal output from a...
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5541401 |
Arrangement for image generation and/or reading having pixel matrices of differing densities
An arrangement e.g. for image generation and/or reading has first and second light element arranged substantially in two dimensions, control and addressing devices for activation of light or...
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5394063 |
Video light apparatus
A reed switch is provided between a video camera and a battery pack circuit section. A current flowing when the video camera operates is detected by the reed switch. A video light is turned on or...
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5347563 |
Method for determining the function representing the effect of non-reciprocity of a radiographic film
The invention relates to radiology systems and, more particularly in such systems, to a method that enables the effect of non-reciprocity of the radiographic film to be determined. This effect of...
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5276320 |
Photometering device
A photometering device comprises: a generator for generating an analog voltage output which varies in accordance with a light intensity of an object field and is proportional to an absolute...
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5225884 |
Excimer laser pulse analyzer and method
System and method for analyzing pulses from an excimer laser by measuring light energy rather than heat energy. The output of the laser is monitored with a photodetector to provide electrical...
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5192968 |
Photometer
A photometer of a camera employs a MOS-type CPU having an open drain type transistor whose drain serving as an output terminal, a CMOS input terminal, and an input gate inverting an input with a...
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5184172 |
Method of and apparatus for automatically controlling exposure
In an automatic exposure (AE) controlling method and apparatus according to the invention, a picturing area or a view is divided into a plurality of zones of which the central one is usually used...
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4980545 |
Photometric circuit
A photometric circuit comprises a switching circuit which causes a photo conductive element which responds to the luminance of an object of measurement to be selectively connected with an...
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4929824 |
light metering device with detector matrix and mean value detection
A light metering device includes a light detecting number having a plurality of light detecting elements arranged in a matrix for detecting brightness of smaller divisions into which a whole image...
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4849781 |
Range detector
A range detector detects a range to an object to be measured by projecting light rays from a light source onto the object and producing an output signal by receiving light rays reflected by the...
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4808811 |
Light integrating circuit for use in a light measuring device which is accurate for both low and high light values
A light measuring circuit including a light sensing device for sensing light and producing a signal representative of the light sensed, a compressing circuit for compressing the signal, a capacitor...
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4774401 |
Light measuring device variably controlled according to focus mode selection
A light measuring device having an automatic focus control mechanism including one-shot type focus control means for effecting focus control in one-shot type focus control mode and servo type focus...
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4704024 |
Photometric circuit for camera
A photometric circuit for a camera has a photo-electric conversion element arranged to measure light in the middle part of the angle of view of the camera and a plurality of photo-electric...
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4701048 |
Input circuit for distance measuring apparatus
An input circuit which converts currents produced from a plurality of photo-sensitive elements arranged in a distance measuring apparatus. The input circuit has a switching element series connected...
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4699504 |
Control system for microimage recorders
A distributed processor control system for use with a microimage recording apparatus includes a system control unit, a machine control unit and an operator control unit. The system control unit...
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4681441 |
Light measuring device
A light measuring device which is provided with a plurality of light sensitive elements and is arranged to selectively detect outputs of these light sensitive elements includes means for...
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RE32437 |
Light measuring device for flash photography
The disclosure is directed to an improved light measuring device which is used in flash photography for measuring a preliminary flash light to obtain camera exposure informations for photography...
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4657378 |
Color printing control system and method
A color printing control system for making prints from negatives having a color printer and a microprocessor. The output of photocells which read color negatives is applied to the microprocessor...
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4639134 |
Process and circuit arrangement for amplifying an input current
To amplify an input current present at the input of a circuit arrangement with a feedback-coupled operational amplifier, two virtually equal potentials are built up in two different current paths...
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4610537 |
Photographic image information detecting device
An image information detecting device for detecting the density for printing is required to cover a wide dynamic range corresponding to the density scope of the original film as well as to cover...
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4566115 |
X-Ray diagnostic system for radiographs
In an exemplary embodiment, an X-ray image intensifier and a camera for photographing the X-ray image intensifier-output image, an automatic exposure timer which includes an integrator for...
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4561753 |
Selective photoresponsive sensing circuit
A photosensor arrangement for providing an exposure influencing control signal in a photographic camera apparatus includes a photosensor array wherein the exposure influencing control signal...
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4556789 |
Measuring circuit for photo-receiving intensity of photosensor
A measuring circuit for measuring the light intensity received by a photosensor comprises a photosensor which generates photocurrent proportional to the intensity of received light, an integration...
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4498753 |
Photometric apparatus for cameras
A photometric apparatus for a camera comprises a reference voltage circuit; an operational amplifier including a photoelectromotive element for photometry, an output terminal of said reference...
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4492858 |
Photometric circuit having a plurality of photoelectric transducer elements capable of being selectively enabled for photometry
A photometric circuit comprises an operational amplifier including a plurality of differential amplifiers, a constant current bias circuit for supplying a constant current bias to the differential...
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4479708 |
Temperature compensation system of light measuring circuit
Disclosed is a temperature compensation system for light measuring circuits. Said system compensates for the change, over temperature, of the output of the light measuring circuit by applying a...
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4476383 |
Photometering device for obtaining exposure information
A multi-metering device comprises division of an object field into a plurality of areas and metering said plurality of areas and generating a plurality of photoelectric outputs corresponding to...
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4473288 |
Photographic device with screen for controlling gradation of photographed image
In a photographic device, there are provided (a) a means for measuring luminous intensity distribution on an object and (b) a screen means for controlling gradation of an image to be formed on a...
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4473744 |
Photometric apparatus for camera
A photometric apparatus for a camera includes a diode for logarithmic compression and a semiconductor analog switch in series connection between an output terminal of a first operational amplifier...
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4394570 |
Photoelectric conversion circuit
A photoelectric conversion circuit comprises a pair of cascade connected semiconductor switching circuits, each of which is formed by a CMOS inverter. A pair of oppositely poled, series connected...
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4390258 |
Photomeric circuit for camera
A photometric circuit includes a differentiator arranged in cascade connection with an integrating circuit including an integrating capacitor which directly integrates a photocurrent produced by a...
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4364650 |
Exposure control method and device
A number of light measuring elements are arranged at various portions of an image of an object focused by an objective. The light measuring elements are grouped for different zones to measure the...
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4339184 |
Digital sample and hold with rollover inhibit
An electronic circuit for sampling a digital pulse train signal and providing a replication in place thereof during a selected holding period includes a binary counter and register for counting and...
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