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7620330 |
Optical receiver device and method
An optoelectronic device has a bright detector and a dark detector and reduces noise in the output of the bright detector using the output of the dark detector.
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7509052 |
Optical receiver, optical transmitter and optical transceiver
An optical receiver includes a first light receiving element to convert an optical signal to an electric signal and to output the electric signal from one end. A light receiving element row is...
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7470885 |
Photodetector-amplifier circuit and optical pickup device
The present invention provides a photodetector-amplifier circuit capable of eliminating an influence of noise due to stray light entering a non-selected photodetector to stably select and switch a...
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7460788 |
Transmitting and receiving device
A transmitting and receiving device, in which the received signal which is produced by the receiving device has only a small amount of crosstalk. This object is achieved by providing a transmitting...
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7460792 |
Receiving circuit and electronic apparatus for optical communication
In an optical communication-use receiving circuit of the present invention, the pulse width of the received pulse which is a binary signal corresponding to the signal optical pulse is specified by...
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7449670 |
Amplifier circuit and optical pickup device
An amplifier circuit according to the present invention includes: a first operational amplifier having a negative input terminal, a positive input terminal, and an output terminal; a photodiode...
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7449669 |
Receiving apparatus
There may be provided a receiving apparatus including: a light receiving element which receives an optical signal and generates a current signal dependent on the optical signal; a conversion unit...
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7427733 |
Gated image intensifier
A gated optical image intensifier 10 is provided with multiple intensifying channels 20, 22, 24, 26 each supplied with radiation via a respective optical channel of an optical splitter. The...
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7423250 |
Systems, circuits and methods for extending the detection range of an inspection system by avoiding circuit saturation
Inspection systems, circuits and methods are provided to enhance defect detection by addressing saturation levels of the amplifier and analog-digital circuitry as a limiting factor of the...
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7376359 |
Digital regulated light receive module and regulation method
The invention discloses a digital adjusting method for an optical receiver module, and the method implements real-time monitor of parameters, on-line adjustment and non-linear compensation. The...
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7373091 |
Multicasting optical switch fabric and method of detection based on novel heterodyne receiver
The inventors propose herein a switch fabric architecture that allows broadcasting and fast channel access in the ns-range. In various embodiments of the present invention, 10 Gb/s receiver modules...
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7330668 |
Low noise light receiver
The low noise light receiver comprises a light sensor for generating a sensor signal, the sensor signal comprising a wanted signal resulting from a light source and an interfering signal resulting...
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7326905 |
Photodetector and optical receiver
An optical receiver is provided with an optical-signal-receiving section and a controlling section. The optical-signal-receiving section incorporates a photodetector. The photodetector has an APD....
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7317566 |
Electrode with transparent series resistance for uniform switching of optical modulation devices
Switching uniformity of an optical modulation device for controlling the propagation of electromagnetic radiation is improved by use of an electrode comprising an electrically resistive layer that...
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7298978 |
Method and apparatus for optimizing decision level of signal output from optical receiver
An optical receiver in an optical communication system, and more particularly, to a method and an apparatus for optimizing a decision level of a signal output from an optical receiver to obtain a...
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7297921 |
Photodetection circuit and confocal microscope that has it
A first amplification unit amplifies at a predetermined amplification rate an output signal from a photodetection unit for detecting an optical signal from a specimen and detecting it. An offset...
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7274010 |
Semiconductor optical amplifier device amplifying an externally applied light signal, semiconductor optical amplification driving device and semiconductor light receiving apparatus
A semiconductor optical amplifier device includes an active layer, an n-type InP substrate, an n-type InP clad layer, a p-type InP clad layer, p-electrodes and n-electrodes. The active layer is...
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7212749 |
Signal receiver having wide band amplification capability
An Improved Signal Receiver Having Wide Band Amplification Capability is disclosed. Also disclosed is a receiver that is able to receive and reliably amplify infrared and/or other wireless signals...
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7173237 |
Ruggedized digital low-light viewing device
A digital low-light viewing device comprises a housing having a first end and an opposing second end, the first end defining an optical input aperture and the second end defining an optical output...
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7170606 |
Multi-way LED-based surface reflectance sensor and spectrophotometer
A light sensor circuit based on direct connection of LEDs to I/O pins of a microcontroller. The LEDs are reverse biased and the parasitic junction capacitance is charged in an output mode. Then,...
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7129462 |
Digitally enhanced image intensification camera
An image intensification camera system (C) for gathering image data includes an image intensifier ( 310 ) for amplifying received light ( 312 ). A relay optic assembly ( 316 ) is coupled between...
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7113321 |
Optical deflection apparatus and manufacturing method thereof, optical deflection array, imaging apparatus, and image projection display apparatus
A miniaturized and highly integrated optical deflection apparatus is realized in which the number of electrodes for driving the optical deflection apparatus is reduced. The optical deflection...
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7057149 |
Method and system for controlling a secondary amplifier with a primary amplifier in an optical network
A method for controlling an amplifier in an optical network includes determining primary pump power information for a primary amplifier and communicating the primary pump power information to a...
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6974946 |
Transmission stacked photodetector
There is provided a photodetector which has the function of measuring the intensity distribution of light with a simple and inexpensive construction and which has a selectivity for a measured...
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6927383 |
Radiation hardened visible P-I-N detector
Disclosed is a method for producing an array ( 20 ) of p-intrinsic-n light detectors, as is an array produced in accordance with the method. The method includes providing a wafer ( 1 ); forming a...
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6903324 |
Optical amplifier amplifying wavelength multiplexed light, and wavelength multiplexed light communications system
Wavelength multiplexed light is amplified by first and second EDFs. Gains of the first and the second EDFs are respectively held to be predetermined values by first and second AGC circuits. Between...
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6898890 |
Night-vision optical device having controlled life expectancy
A night-vision optical device of the invention with controlled life expectancy contains a time measuring device built into the housing of the aforementioned device for measuring the accumulated...
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6894266 |
Single chip ASIC and compact packaging solution for an avalanche photodiode (APD) and bias circuit
A compact integrated APD device integrates the bias voltage and temperature compensation functions inside a standard 4-pin PIN package. The active components of the bias and temperature...
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6838654 |
Photodetection system and circuit for amplification
A first device comprising a first current mirror is used to amplify the output of a first photodetector. A second device comprising a current mirror arrangement is employed to amplify the output of...
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6834165 |
Parallel opto-electric structure for high sensitivity and wide bandwidth optical transceiver
An optical receiver circuit including a plurality of PIN diodes, each associated with a dedicated element transimpedance amplifier, the outputs of the element transimpedance amplifiers being...
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6815656 |
Integrated optical cross-connect amplifier
A vertical cavity optical amplifier can tilt to reflect light in different directions. An array of such amplifiers can serve as an optical cross-connect.
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6765189 |
Small form factor in-line switched multichannel fiber optic power monitoring apparatus
A switched multichannel fiber optic power monitoring apparatus, includes a plurality of photodetectors, each connected to a tap of a different optical line for converting an optical signal...
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6765188 |
Method and apparatus for converting the output of a photodetector to log voltage
In a video receiver, a photodiode is terminated with one or more junction diodes to provide an output voltage that is a log function of the incident optical power. The termination with the diode...
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6756578 |
Photocell bias circuit
Receiver circuits are provided for detecting a target light source. The circuits include a photocell arranged to detect light impinging thereupon, and a biasing circuit that maintains a constant...
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6740807 |
Light-receiving device and image sensor
A differential response light-receiving device comprising: a semiconductor electrode comprising an electrically conductive layer and a photosensitive layer containing a semiconductor sensitized by...
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6740859 |
Fractional substraction resistive readout for position sensitive photo-multiplier tubes
A readout circuit for an imaging detector that improves resolution and increases field of view in a display compared to traditional readout circuits. The readout circuit comprises two or more...
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6713749 |
Monolithic loss-of-signal detect circuitry
A Loss Of Signal (LOS) circuit in an opto-electronic receiver circuit. The LOS circuit includes a current to voltage converter and a comparator circuit. The current to voltage circuit receives a...
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6710324 |
Optoelectronic distance measuring device
An optoelectronic distance measuring device has at least one transmitter unit to transmit pulsed electromagnetic radiation, at least one receiver unit associated with the transmitter unit to...
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6707023 |
Differential photoelectric receiver circuit
A photoelectric receiver circuit for converting an optical signal to an electrical signal, includes first and second transimpedance amplifiers, a photodiode having a first end connected to an...
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6665468 |
Focal plane array optical data extraction and memory
The charge of pixels in a FPA array is retrieved by propagating an optical wave through a waveguide to interact with pixel charges from the FPA. An optical detector receives an optical wave altered...
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6642493 |
Compact modular, configurable base for position sensitive photo-multipliers
A modular base for a position sensitive Photo-Multiplier Tube (PS-PMT) that can be connected to other similar modular bases to form arrays of PS-PMTs. X and Y resistor chains are provided within...
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6624405 |
BIST for testing a current-voltage conversion amplifier
A dual function circuit for providing an output voltage to a transimpedance amplifier is disclosed. The dual function circuit can be selected between functioning as a current to voltage conversion...
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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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6501064 |
Image sensor with active sensor elements
An image pick-up includes a number of active sensor elements ( 11; 12; 13; 14 ) arranged in an array and a number of conductive lines extending over the surface of the array for the transfer of...
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6467914 |
Night vision goggles compatible with full color display
An ANVIS aid, such as an ANVIS goggles set, with a first optical filter is described. A second optical filter blocking light in an opposite sense from the first optical filter is placed at a color...
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6423961 |
Pixel readout switched capacitor buffer circuit and method therefor
A pixel signal amplification circuit ( 200 ) receives a signal from a pixel element. A first semiconductor switch ( 225 a ) is connected to the pixel element and transfers a reset value of the...
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6417503 |
Optical sensor circuit with output changing means
An optical sensor circuit of the invention includes a photodiode, a reset switch, a capacitor for charge integration, an operational amplifier, reference voltage generating circuits connected to...
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6410902 |
Optical receiver
In order to compensate for deterioration in gain caused by decreases in signal source impedance on a higher frequency region, a frequency characteristic compensating inductor is inserted between a...
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6396048 |
Device and method for detecting an optical signal
An optical detector has at least one image sensor element that generates an image sensor element output signal according to the illumination incident on the element. A readout amplifier for the one...
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6365951 |
Methods on constructing an avalanche light emitting diode
Methods of laying out avalanche light emitting diodes (LEDs) are described in which a heavily impurity doped region of one type of polarity, a second, lighter doped region of like polarity, and a...
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