Optical Computing Devices

Matches 751 - 800 out of 1,362	< 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 >

Document	Document Title
JP2003500698A	[Title of Invention] Optical Treatment A method of image compression, comprising: providing image-data encoding light; transforming said light from an image space to a transform space utilizing an optical component; and converting said transformed light into electrical signal...
JP2002543525A	INDUSTRIAL APPLICABILITY: Methods, systems and computer program products for nonlinear mapping of multidimensional data. A method, system and computer program product are provided for scaling, or dimensionally reducing, multi-dimensional data sets that scale well for large data sets. The invention scales multi-dimensional data sets by determining one or mo...
JP3351141B2	[Title of Invention] Optical Pattern Identification Circuit
JP3345123B2	[Title of Invention] Pattern recognition device
JP2002277912A	OPTICAL SWITCH, TRANSISTOR, COMPUTER SYSTEM, AND METHOD OF SWITCHING LIGHT SIGNAL To provide an optical switch which includes a saturable absorber.An input waveguide 68, an output waveguide 63 and a control beam waveguide 64 are coupled with the saturable absorber 6. When no light is inputted to the control beam waveg...
JP2002531861A	Description: Optical Quantum Calculation Method An optical method for quantum computing that makes use of nonlocal effects to construct the quantum gates themselves. A nonlocal interaction in which pairs of atoms interchange two photons produces a large nonlinear phase shift. These no...
JP3325934B2	[Title of Invention] Optical pattern recognition classification device PURPOSE:To correctly recognize and classify patterns in spite of generation of a defect in the patterns and to enable the identification of the presence or absence of the defect and the specification of a defect place. CONSTITUTION:This ...
JP2002203215A	DISPLAY CARD HAVING OPTICAL COMPUTER To provide a high security property by displaying numerical characters and an image on a card itself or making the display to be an authentication key in an ID card used to authenticate an individual in various security systems.An optica...
JP3300351B2	[Title of the Invention] Optical processing in an asynchronous transmission mode network PCT No. PCT/GB93/00090 Sec. 371 Date Sep. 8, 1994 Sec. 102(e) Date Sep. 8, 1994 PCT Filed Jan. 15, 1993 PCT Pub. No. WO93/14604 PCT Pub. Date Jul. 22, 1993An optical code recognition unit (OCRU) for recognizing a predetermined n-bit opti...
JP3297682B2	QUANTUM COMPUTING ELEMENT AND QUANTUM COMPUTING UNIT To handle a metal atom (molecule) and an organic compound as one qubit and to eliminate the device for holding an electrode, etc., by including the metal atom or molecule in an organic compound and representing information with the excit...
JP3279605B2	METHOD FOR IDENTIFYING PATTERN PURPOSE: To provide a pattern identifying method capable of surely converging learning, attaining pattern identification only by one learning and identifying that a pattern is unknown even when an unknown pattern which is not learned yet...
JP2002117404A	PATTERN RETRIEVAL METHOD To provide a pattern retrieval method and a device thereof capable of retrieving at a high speed.When a pattern is retrieved, an observation image of an image taken in from a digital camera is cut out using a retrieval window by a comput...
JP3262857B2	NEURAL NETWORK MODEL AND NEURAL NETWORK DEVICE PURPOSE: To provide the neural network model and neural network device which can be applied for various optimizing problems or recognizing problems and accelerate convergence to a solution without generating any vibrating solution. CONST...
JP3261194B2	MULTIPLYING DEVICE, LINEAR ALGEBRA PROCESSOR, NEURO-MORPHOLOGIC PROCESSOR AND OPTICAL PROCESSOR PURPOSE: To enable efficient and parallel vector matrix computation by providing electro-optical emitters, opto-electrical transducers and controllable attenuators disposed between these emitter and the transducers. CONSTITUTION: Paralle...
JP2001523366A	Description: Dynamic Synapse for Signal Processing in Neural Networks An information processing system having signal processors that are interconnected by processing junctions that simulate and extend biological neural networks. Each processing junction receives signals from one signal processor and genera...
JP2001523332A	INDUSTRIAL APPLICABILITY: Object classification and identification system An object classification and identification system including stored discriminator quantities indicative of the surface characteristics of known objects; an arm coupled to a detector which provides a voltage signal which varies relative t...
JP2001520768A	[Title of Invention] Pattern recognition operation and its execution method Pattern-recognition computing can be accomplished using wave-type or other types of energy. In pattern-recognition computing which uses a plurality of wave-type energy input patterns modulated with quantized information, energy from the ...
JP2001290549A	ARITHMETIC UNIT To provide an arithmetic unit having an increased operation speed by a relatively simple structure by using the physical properties of light. This unit is equipped with (n) light-light switched and (n) spectroscope groups corresponding t...
JP2001516912A	PROBLEM TO BE SOLVED: To obtain an optical signal stream. The present invention relates to a method and apparatus for generating an optical bit slot window in which N bit slots having the same logical state are generated. A switching device is used which is coupled to an optical pulse source wh...
JP3210447B2	OPTICAL OBJECT EXTRACTING DEVICE PURPOSE: To provide the optical object extracting device dispensing with a matched filter in which an interference fringe of a hologram, etc., to be manufactured for every objective pattern to be extracted is desired is drawn, and thereb...
JP3194973B2	[Title of Invention] Photoresponsive Excitable Artificial Membrane and Method for Manufacturing The PURPOSE:To associate bacteriorhodopsin with a photoresponsive excitability artificial membrane under satisfactory condition by separately forming a first artificial membrane absorbing lipids for imparting excitability and a second artifi...
JP2001184137A	METHOD FOR EXPRESSING INFORMATION OF COMPUTER To shorten the processing time of a method for expressing the information of a computer without requiring the enormous number of codes. Information is expressed by using four different states of optical pulses, a state that no optical pu...
JP3182143B2	[Title of Invention] Optical Total Adder SUM and CARRY output signals of a first optical half adder are provided to one input terminal of a second optical half adder and an optical latch memory, respectively, and an output signal of the optical latch memory is provided to the o...
JP3179496B2	[Title of Invention] Improved Semiconductor Architecture and Its Application A new technology in semiconductor electronics is provided wherein basic semiconductor elements (BSEs) are fabricated on the surfaces of hollow, cone-shaped and/or other planar or non-planar substrata. Photosensitive and photoemitting ele...
JP3178570B2	OPTICAL ELEMENT FOR POLARIZED WAVE APPLICATION PURPOSE: To reset a memory by a light signal and to easily obtain negative logic by placing a TE amplification region and a TM amplification region in line in the travelling direction of light. CONSTITUTION: An active layer 1005 for ampl...
JP3151711B2	[Title of Invention] Optical Neural Processor
JP3142287B2	[Title of Invention] Neural Network
JP3142284B2	[Title of Invention] Optical Computer PURPOSE:To provide this optical computer with generality as constitution independent of the number of substituting rules by preparing one recognition block and one substituting block. CONSTITUTION:An input image storing/shifting part 3 a...
JP3142286B2	[Title of Invention] Optical Computer
JP3130329B2	[Title of Invention] Optical pattern recognition element PURPOSE:To miniaturize an optical pattern recognition device by forming a three-dimensional waveguide optical system by arranging flat optical elements consisting of a diffraction grating, a Fourier transformation lens, a mirror, and a l...
JP2001013464A	IMAGE PROCESSOR To fast process an input image and to obtain a stable process result.The image processor is equipped with an optical writing type PAL-SLM (parallel aligned nematic liquid crystal spatial light modulator) 8, at least one FLC-SLM (ferroele...
JP3121148B2	OPTICAL INFORMATION PROCESSING CIRCUIT PURPOSE: To eliminate the need for many connections for a local coupling type, to reduce the size of a processing system, and to transmit a minus-number signal. CONSTITUTION: Constituent units of an optical neural network as an optical i...
JP3118018B2	[Title of Invention] Natural Network
JP3115589B2	[Title of Invention] Neural network PCT No. PCT/GB90/01782 Sec. 371 Date Jun. 11, 1992 Sec. 102(e) Date Jun. 11, 1992 PCT Filed Nov. 20, 1990 PCT Pub. No. WO91/07714 PCT Pub. Date May 30, 1991.A neural network has inputs formed by square array of optical modulators Mij and...
JP2000330077A	OPTICAL INFORMATION PROCESSING DEVICE To enable performing various filter processing and picture processing and to make a device compact by obtaining simultaneously not only picture information filtered by a filtering means but Fourier transformation picture information by a...
JP3112800B2	[Title of Invention] Optical Arithmetic Logic Unit A optical processor facilitates the alignment between an original image and transformation patterns, thus improving the operation accuracy, and, if a fixed transmission mask is to be used, facilitates the fabrication of the fixed transmi...
JP3107591B2	[Title of Invention] Optical pattern matching method PURPOSE:To execute the pattern matching of lots of reference patterns with the pattern to be inspected in parallel and to correspond it to input information being intrinsically ambiguous by a simple optical system. CONSTITUTION:A luminou...
JP3106525B2	[Title of Invention] Addition Method and Its Circuit
JP3100167B2	[Title of Invention] Pattern matching device
JP3096717B2	[Title of Invention] Natural Network
JP3085311B2	[Title of Invention] FIFO buffer A FIFO buffer in which respective portions are controlled in a distributed manner is provided. In the FIFO buffer, a number of loop circuits (M1,M2,M3,M4) having delay elements are provided in which respective loop circuits are connected...
JP2000222175A	IMPROVED OPTOELECTRONIC TWO-STAGE 11 AND 00 CUT ADDER To improve an addition speed by using AND gates by digits to be sent although conventional technology uses one AND gate for a carry signal sent from a certain start-point-(s) digit to several end-point-(t) digits. The AND(1)H output (hig...
JP3062664B2	[Title of the Invention] An optical pattern recognition device having a coordinate conversion function. PURPOSE:To achieve pattern recognition accurately and at a high speed even if a size or a rotary angle of an object to be recognized changes in various manners. CONSTITUTION:After a reference image and a newly input image to be correlate...
JP3058177B2	[Title of Invention] Optical Correlation System An optical correlator system comprising a laser to generate a signal beam, a film to spatially modulate that beam, and a beam splitter to split the signal beam into two component beams. The first component beam is directed onto a first s...
JP2000131726A	PARALLEL SHIFT OPTICAL MODULATION ELEMENT To shift the picture written in pixels in a single action over the entire pixels by changing the state of an optical material so as to shift the states of the pixels. Relating to one of transparent insulating substrates 3, optical sensor...
JP2000122013A	OPTICAL DEVICE FOR PROCESSING INPUT SERIES SEQUENCE OF N BIT SUBJECTED TO PHASE MODULATION AND METHOD FOR OPTICALLY COMPARING OPTICAL SERIES SEQUENCE OF N BIT SUBJECTED TO PHASE MODULATION WITH SEQUENCE OF PRESCRIBED N BIT To provide an optical asynchronous type device for processing optical series sequence of N bit in order to compare the optical series sequence of N bit with target sequence.This device has a) an input means 64 of the input optical series...
JP2000066755A	OPTIC/ELECTRONIC 2-STAGE 11&00 CUT ADDER To provide an optic/electric gate 2-stage adder. The output of a start point (s) digit AND 1 is sent as a diode di 2 → a Cts line 3 → the base be 5 of the transistor tr 4 of an end point (t) digit → a resistor 6 → H (high voltage...
JP2000047851A	OPTOELECT 00 CUT ADDER To produce a binary adder of two stages of gates. Starting point two digits s, s+1 digit AB=NAND (1) digit upper signals C, L (0 volt) are put in AND, Pts (2) to make the output L to emit laser diode LD, Uc (5) light, 00 of an intermedia...
JP3009562B2	[Title of Invention] Optical switching device A light transmission circuit 20 is biased to one optical bistable region of its multistable characteristic by a bias light from a light source 29. The bias light is superimposed by plural control pulse lights, and the superimposed light ...
JP2991959B2	[Title of Invention] Optical Ratio Amplifier 1. A first and second input electron absorption modulators connected in series to receive an optical input beam, respectively. The first and second output electronic modulators, respectively, connected in series to generate an optical output beam, Having an electrical amplifier that electrically connects a first node located between the first and second input modulators to a second node located between the first and second output modulators. A featured optical power ratio amplifier. 2. The optical power ratio amplification device according to claim 1, wherein the electron absorption modulator is a self-linear modulator that generates one electron of a photocurrent of each absorbed photon. 3. The optical power ratio amplification device according to claim 1, wherein the electron absorption modulator is a multiple quantum well diode. 4. The optical power ratio amplification device according to claim 1, further comprising a voltage source coupled to the first input electron absorption modulator and the first output electron absorption modulator. 5. The optical power ratio amplification device according to claim 1, wherein the voltage amplifier is a single gain amplifier. 6. The optical power ratio amplification device according to claim 1, further comprising first and second light supply beams incident on the first and second output electron absorption modulators, respectively. 7. The first and second light supply beams are characterized in that they are larger than the power of the first and second light input beams incident on the first and second input electron absorption modulators, respectively. The optical power ratio amplification device according to claim 6. [Technical field to which the invention belongs] The present invention relates to an amplifier that amplifies the optical power ratio. Optical information processing requires the ability to perform analog operations such as light beam correlation, rotation, and difference. These operations result in positive and negative values. Since the intensity of the light beam is always positive, positive and negative values are sometimes expressed as the difference in power between the two light beams. Various methods are known as methods for processing a pair of light beams having analog values determined by such a difference in power. An example of such a method is disclosed on pages 678-698 of IEEE J. Quantum Electron., Vol.29, Number 2, m February 1993. One limitation of such a method is that the light beam of the optical system is inevitably weakened, so that the analog value represented by the difference in the power of the light beam is also weakened. [Means for solving problems] According to the present invention, the analog value is expressed as a ratio of optical power rather than as a difference in optical power. Since the power ratio is equal and has no effect of attenuation that affects the light beam, it is more advantageous to express it as a ratio of light power rather than as a difference in light power. Each optical power ratio amplifier has first and second electron absorption modulators connected in series to receive the optical input beam. The first and second output electron absorption modulators are each connected in series to generate an optical output beam. The voltage amplifier electrically connects the first node between the first and second input modulators to the second node between the first and second output modulators. In operation, the power ratio of the output beam is a function of the power ratio of the input beam. In one embodiment of the invention, the electron absorption modulator is, for example, a self-linearized modulator for producing one electron in the photocurrent of each absorbed photon. It is a multiple quantum well diode like. Further, the voltage amplifier is a voltage amplifier, which is a single gain amplifier. BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 shows an embodiment of the optical ratio amplifier 20 of the present invention. Bipolar input signal is optical beam P I1 And P I2 The analog value is represented by the power ratio P. I1 PI2 be equivalent to. Power ratio P greater than 1 I1 / P I2 Indicates, for example, a positive value and has a power ratio P less than 1. I1 / P I2 Indicates a negative value. Since the power ratio is not affected by the attenuation affected by both of the equal amounts of light beams, it is preferable to express the analog value as the ratio of light power rather than the difference in light power. The optical ratio amplifier 20 has first and second electron absorption modulators 2 and 4 connected in series, and an output electron absorption modulator similarly connected in series. Each electron absorption transformer generates a photocurrent proportional to the power of the light beam incident on it. The voltage amplifier 10 connects the first node 11 located between the first and second input modulators 2 and 4 to the second node 13 located between the first and second output modulators 6 and 8. .. During this operation, the electron absorption modulator is reverse biased. In the embodiment of the present invention shown in FIG. 1, the common voltage power supply is connected to the electron absorption modulators 2 and 6, and the electron absorption modulators 4 and 8 are grounded. Optical input beam P during operation I1 , P I2 Is incident on input modulators 2 and 4, and the light supply beam P S1 And P S2 Is incident on the output modulators 6 and 8. As described below, the output modulators 6 and 8 have an optical output beam P. o1 , P o2 Responds to the input beam by generating. The ratio is the input power ratio P I1 / P I2 Is just a function of. To understand this relationship between the input and output beams, the operating voltage V1 across the input modulator is the input power ratio P. I1 / P I2 It should be noted that This latter relationship can be understood by reviewing certain characteristics of electron absorption modulators well known to those of skill in the art. As described above, the electron absorption modulator applies a reverse bias to generate a photocurrent in response to a light beam incident on it. The generated photocurrent is proportional to the power of the light beam absorbed by the modulator. In certain cases, instead of the voltage range, wavelength and incident power, almost one photocurrent is generated for each absorbed photon. The amount of power absorbed by the modulator is determined by the magnitude of the voltage used (at least in a constant voltage and wavelength range). Therefore, for a given incident light power, the photo current increases as the applied voltage increases. Such a function is shown in FIG. 2, and FIG. 2 shows the current-voltage relationship of the electron absorption modulator. Curves 20 and 22 show not only the relationship of difference but also the fixed value of the incident light power. Curves 20 and 22 are scaled diagrams, respectively, because some of the absorbed incident power is largely independent of the incident power at a given voltage and wavelength. Based on the characteristics of the electron absorption modulator described above, the voltage V Can be determined by conventional load line analysis. In FIG. 3, the solid line curves 30 and 32 are the voltage V. The load line showing the current-voltage correlation of the input modulator 4 is shown. The current-voltage correlation is determined by the above-mentioned modulator characteristics, and curves 30 and 32 are similar to those shown in FIG. In FIG. 3, the dotted line is the input beam P incident on the input modulator 2. I1 The load line of the input modulator 2 for is shown. Operating voltage V across input modulator 4 for a given incident beam power Is determined by the intersection of the current-voltage curve of the incident power and the load line. For example, in FIG. 3, different input beams P incident on the input modulator 4 I2 Operating voltage V corresponding to It shows two different values of. In particular, when the incident power changes from a low value (curve 30) to a high value (curve 32), the operating voltage V Is V 1b From V 1a Decreases to. V And input power ratio P I1 / P I2 Dependency between and is P I1 / P I2 So that P does not change I1 And P I2 It is shown in Figure 3 that the dotted load line and the current-voltage curve move up by the same amount only if both of them change due to the same factor. As a result, even the input beam P I1 And P I2 Operating voltage V even if it changes Is given P I1 / P I Does not change the ratio of. That is, V Is the input power ratio P I1 / P I2 Determined by the individual input beam P I1 And P I2 It is not determined by the value of. Voltage V o o Is applied to the output of the amplifier 10 and the voltage V applied to the output modulator 8 o o Is the operating voltage V Is proportional to. Thus, V Is the input power ratio P I1 / P I2 The voltage across the output modulator 8 is also determined by the input power ratio P I1 / P I2 Determined by. Part of the power absorbed by the electron absorption modulator as described above increases as the applied voltage increases. Voltage V o o Is applied to the output modulator 8, so V o o Is the supply beam P absorbed by the output modulator 8 S2 Determined part of, thus V o o Is the output beam P o1 Determine the value of. In addition, the voltage V o o Determines the voltage across the output modulator and therefore the feed beam P absorbed by the output modulator 6 S1 Determine part of, in other words, V o o Is the output P o o Determine the value of. Supply power ratio P S1 / P S2 Is a fixed value and the output power ratio P o1 / P o2 Is a function of voltage V. Finally, V o o Is V In proportion to V In turn P I1 / P I2 Since it is determined by, the output power ratio P o1 / P o2 Is the input power P I1 / P I2 It is a function of only the ratio of. That is, the device of FIG. 1 has a ratio of P. I1 / P I2 Ratio P determined by the value of the input signal represented by o1 / P o2 Provides the output signal represented by. Further, the device of FIG. 1 is an input P forming an input signal. I1 And P I2 Power supply power P with more power S1 And P S2 Functions as a more desirable amplifier by using. In this way, the relatively weak input beam P I1 And P I2 Is a very powerful output beam P o1 And P o2 To control. The present invention can be used with any electron absorption modulator such as a multiple quantum well diode in which the absorbed power increases with the applied voltage. One example of a modulator that can be used is a self-linear modulator, which produces one electron in the photocurrent of all photons absorbed from the incident light power beam. Self-linearization modulators are cited and described in DABMiller et al. IEEE Journal of QuantumElectronic, Vol.QE-21, Numer 9, September 1985, page 1462-1476. While the electron absorption modulator shown in FIG. 1 transmits light, other modulators used as modulators have a reflective surface that reflects the light back to the modulator. In the present invention, any type of voltage modulator can be used, if desired. In one embodiment of the invention, the voltage amplifier is a voltage V at the amplifier output. Is the operating voltage V A single gain amplifier is used so that they are equal to each other. FIG. 4 shows an example of a single gain amplifier. This amplifier uses depletion mode field effect transistors (FETS) 40 and 42 arranged in a source-following configuration. Depletion mode FETS operates at near zero gate source voltage. This arrangement provides a substantially single voltage gain between the amplifier inputs and outputs. Other single gain amplifiers include amplifiers formed by operating amplifiers and are well known to those of skill in the art. It is desirable that the voltage amplifier requires only a low current at that input and is able to carry a larger current at that output while maintaining a substantially fixed voltage increase between the input and output. The optical proportional amplifier of the present invention is formed as a discrete component, that is, a single configuration monocilically integrated on a semiconductor wafer. Enhancement FETS using monosilic integration can be achieved by using conventional GaAs fabrication techniques as described in SMSze, Physics of Semiconductor Devices, Wiley, New York, 2nd ed. 1981, p.332. Monocylic integration using depletion mode FETs, quantum well modulators, and photodetectors is disclosed, for example, in LAD'Asaro et al. IEEE Jounal of Quantum Electronics, methodo Vol.29, Number2, February 1993, pages 670-677. Can be achieved in the same way. The above embodiments merely illustrate the principles of the invention, that various modifications by those skilled in the art can be made without departing from the spirit of the invention, and the invention is limited to the claims. Please note that. One such variant involves replacing a plurality of electron absorption modulators, respectively, of the input electron absorption modulators 2 and 4, which are coupled in series. Other variants include replacing input modulators 2 and 4 with modulator circuits for spatial differentiation, convolution, and correlation. Examples of such circuits are disclosed in IEEE J. Quantum Electoron., Vol.29, Number2, February 1993, pages 678-698. Although these circuits in the present invention are not truly derived from a mathematical point of view, they can perform other useful functions such as detection of edges, bumps and other features. [Effect of the invention] As a result of this behavior, the object is perceived regardless of changes in brightness, as it depends on the ratio of local (light) intensity rather than the local brightness of the image. obtain. [Simple explanation of drawings] [Figure 1] An embodiment of the optical ratio amplifier according to the present invention is shown. [Figure 2] The current-voltage correlation of the electron absorption modulator is shown. [Fig. 3] The load diagram of the circuit of FIG. 1 is shown. [Fig. 4] An example of a well-known single gain amplifier used in the present invention is shown. [Explanation of symbols] 2, 4 input modulator 6, 8 output modulator 11 1st node 13 Second node 20 optical ratio amplifier 40, 42 Depletion Mode Field Effect Transistors (FETS) Apparatus for amplifying an optical power ratio (Pi1/i2) includes first (2) and second (4) input electro-absorption modulators coupled together in series, each receiving an optical input beam (Pi1, Pi2). First and second output electro-a...

Matches 751 - 800 out of 1,362	< 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 >