| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 201 | All optical analog-to-digital converter employing an improved stabilized optical interferometer | US09336317 | 1999-06-18 | US06175320B1 | 2001-01-16 | Donald G. Heflinger |
| An apparatus for stabilizing optical interferometers utilized in an all analog to digital converter using an additional optical signal that differs in wavelength by a factor of two from the wavelength used for the analog to digital conversion is disclosed. The optical interferometers have an optical path length that is tunable. They develop a first interference pattern from the additional optical signal when the optical path length is a prescribed value. The interferometers develop a second interference pattern from the additional optical signal when the optical path length is not the prescribed value. Optoelectronic detectors are responsive to the optical interference pattern generated by the additional optical signal and develop electronic feedback signals when the first interference patterns are not present. Accordingly, feedback circuits produce the optical path length adjustment drive signals, which serve to change the optical path lengths until each interferometer reaches the prescribed value, thereby tuning the optical interferometers. Each tuned interferometer then generates the appropriate optical output from the original optical signal that is made to very in wavelength in accordance to the amplitude of an analog signal so as to produce the appropriate data bit in a corresponding digital word. | ||||||
| 202 | Repetitive absorptive thresholding optical quantizer | US343733 | 1999-06-30 | US6160504A | 2000-12-12 | Richard A. Fields; Juan C. Carillo, Jr.; Mark Kintis; Elizabeth T. Kunkee; Lawrence J. Lembo; Stephen R. Perkins; David L. Rollins; Eric L. Upton; Bruce A. Ferguson |
| An optical quantizer (10) that employs a chain of optical thresholding devices (16) positioned in the propagation path of an optical input beam (12) to be quantized. Each optical thresholding device (16) saturates and turns transparent if the intensity of the optical beam (12) that impinges it is above a predetermined threshold level designed into the device (16). If the input beam (12) saturates the optical thresholding device (16), the device (16) outputs an indicator signal (22) identifying the saturation. The input beam (12) propagates through the optical thresholding device (16) with some attenuation caused by the saturation, and impinges subsequent optical thresholding devices (16) in the chain. Eventually, the attenuation of the input beam (12) caused by the multiple saturations will decrease the beam intensity below the threshold level of the next optical thresholding device (16). The number of indicator signals (22) gives an indication of the intensity of the input beam (12). The optical thresholding devices (16) can provide optical or electrical indicator signals (22) depending on the type of thresholding device (16) used. | ||||||
| 203 | Upward-folding successive-approximation optical analog-to-digital converter and method for performing conversion | US133038 | 1998-08-11 | US06121907A | 2000-09-19 | Richard A. Fields; David L. Rollins; Stephen R. Perkins; Eric L. Upton; Elizabeth T. Kunkee; Lawrence J. Lembo; Juan C. Carillo, Jr.; Mark Kintis |
| An optical analog-to-digital converter (10) which fully operates in the optical domain and utilizes an upward-folding successive approximation approach for conversion. The converter (10) includes a plurality of optical stages (14, 16, 18) where each stage (14, 16, 18) generates a digital bit. Each stage (14, 16, 18) includes an optical threshold switch (30, 56, 78) that sets the bit high when the switch (30, 56, 78) is closed. When a sample amplitude of the analog signal is compared to a threshold value and found to exceed the threshold value, the bit is set to "high" and the sample is passed directly onto the next stage (14, 16, 18). If the sample amplitude is found to be less than the threshold value, the bit is set to "low" and an intensity equal to the maximum signal intensity minus the threshold intensity is added to the sample amplitude. Each successive stage (14, 16, 18) compares the normalized signal sample to thresholds growing closer and closer to the maximum signal intensity. Multiple bits can be obtained by cascading stages. | ||||||
| 204 | Digital phase modulator for fiber optic sagnac interferometer | US670956 | 1991-03-18 | US5137359A | 1992-08-11 | James R. Steele |
| A phase modulator for use in a circuit for measuring the output of a fiber optic gyroscope. The phase modulator is adapted to receive the digital word generated by such a circuit that comprises phase shift information. The digital word includes both the feedback Serrodyne ramp and the phase modulation conventionally generated for shifting the operating point of the gyroscope to enhance the sensitivity of output beam intensity to phase difference. The modulator employs a plurality of electrode elements with the lengths of adjacent segments having a power-of-two relationship. As a result, the digital word may be directly received by the phase modulator without prior conversion to an analog signal. | ||||||
| 205 | Digital position sensor for indicating the relative position of relatively movable parts | US411735 | 1989-09-25 | US4980548A | 1990-12-25 | Manfred Dennhoven; Frank Fichtner; Mario Gauer; Enno Holzenkaempfer; Ulrich Traupe |
| A position sensor for supplying digital signals corresponding to the position of a movable part in non-contacting, reliable fashion. A number of individual electrodes are applied on a substrate with a layer of a-Si:H applied thereon. A common, large-area collector electrode is applied over the a-Si:H layer. A light beam is moved over the collector electrode to activate a predetermined combination of photosensitive pixels which may be photodiodes or photoresistors. These pixels are situated between the individual electrodes and the common collector electrode. The output signals of the photodiodes are in the form of a digital code that characterizes the location of the light beam. | ||||||
| 206 | Optical analog-digital converter provided with a nonlinear optical element and an optical feedback system for the output lights of said element | US195950 | 1988-05-19 | US4926177A | 1990-05-15 | Hajime Sakata |
| An optical analog-digital converter comprises a nonlinear optical element having a threshold value for the intensity of an input light and producing a first and a second output light from the input light with the threshold value as a reference. The optical element produces a first output light of intensity corresponding to a digital signal meaning the digital 0 and a second output light of intensity proportional to the input light intensity when the intensity of the input light is smaller than the threshold value, and produces a first output light of an intensity corresponding to a digital signal meaning the digit 1 and a second output light of intensity equal to the input light intensity minus the threshold value when the intensity of the input light is greater than the threshold value. A device inputs to the nonlinear optical element a light having an intensity distribution corresponding to an analog signal, an optical feedback system causes the second output light of the nonlinear optical element produced from the input light to be again input to the nonlinear optical element, and a device provided in the feedback system amplifiers the second output light. | ||||||
| 207 | Optical analog to digital converter | US141934 | 1988-01-06 | US4851840A | 1989-07-25 | Alastair D. McAulay |
| An analog to digital converter, adapted to convert an optical analog signal to an equivalent optical digital signal being one of x optically presented digital numbers defined by an n-bit digital word, where X=2.sup.n. The optical analog signal is light having an intensity variable over a range from a minimum to a maximum value. The analog to digital converter comprises a linear array of comparator means, a linear array of logic means, and a linear array of decoding means. The linear array of comparator means is responsive to the light at a plurality of input positions, x, and produces binary threshold signals which respresent a one-dimensional spacial reference having a length of corresponding to the magnitude of the sensed intensity. The linear array of logic means is responsive to the binary threshold signals and produces an optical index signal which is a one-point spacial reference having a location, an index postion, corresponding to the length of the one-dimensional spacial reference. The linear array of decoding means is responsive to the optical index signal and projects the digital number corresponding to the sensed intensity as the optical digital signal in response to being illuminated by the optical index signal. | ||||||
| 208 | High speed analog-to-digital converter | US546991 | 1983-10-31 | US4571576A | 1986-02-18 | Nils A. Olsson; Chandra K. N. Patel |
| An analog-to-digital converter using a frequency tunable laser having output radiation of a frequency determined by the input voltage to the laser is described. | ||||||
| 209 | Light intensity modulator with digital control and a digital-analog converter comprising such a modulator | US151616 | 1980-05-20 | US4288785A | 1981-09-08 | Michel Papuchon; Claude Puech; Jean C. Anne |
| The invention relates to a light intensity modulator controlled by a "word" of n bits and an opto-electronic digital-analog converter.The modulator comprises a two-arm interferometer in whose length there is created, by opto-electrical effect, successive phase shifts controlled respectively by control bits and whose values, when the control bits are in state 1, conform to the successive powers of 2. The total phase shift obtained thus depends directly on the analog value of the control word and the emerging intensity is modulated as a function of this word. A digital-analog converter is constructed by adding a photodetector means whose output voltage depends on the analog value of the control word. | ||||||
| 210 | Analog to digital converter for two-dimensional radiant energy array computers | US657997 | 1976-02-13 | US4045792A | 1977-08-30 | David H. Schaefer; James P. Strong, III |
| Analog to digital converter for two-dimensional radiant energy array computers in which the converter stage derives a bit array of digital radiant energy signals representative of the amplitudes of an input radiant energy analog signal array and derives an output radiant energy analog signal array to serve as an input to succeeding stages. The converter stage includes a digital radiant energy array device which contains radiant energy array positions so that the analog array is less than a predetermined threshold level and which doesn't contain radiant energy at array positions where the input analog array exceeds the threshold level. A scaling device amplifies the radiant energy signal levels of the input array and the digital array so that the radiant energy signal level carried by the digital array corresponds to the threshold level. An adder device adds the signals of the scaled input and digital arrays at corresponding array positions to form the output analog array. | ||||||
| 211 | Analog-to-digital converter with electro-optical coding | US591287 | 1975-06-30 | US3997894A | 1976-12-14 | Arnold M. Levine |
| An EMP resistant A/D converter having no triggered circuits, the digital code word being formed by sampling the analog function on a periodic basis, selectively quantizing the levels sampled into channels providing the digits of the output code through a discrete fiber optic delay medium for each digit in the output. Electronic to light conversion and vice versa are included. | ||||||
| 212 | Two-dimensional radiant energy array computers and computing devices | US468614 | 1974-05-08 | US3996455A | 1976-12-07 | David H. Schaefer; James P. Strong |
| Two-dimensional digital computers and computer devices operate in parallel on rectangular arrays of digital radiant energy optical signal elements which are arranged in ordered rows and columns. Logic gate devices receive two input arrays and provide an output array having digital states dependent only on the digital states of the signal elements of the two input arrays at corresponding row and column positions. The logic devices include an array of photoconductors responsive to at least one of the input arrays for either selectively accelerating electrons to a phosphor output surface, applying potentials to an electroluminescent output layer, exciting an array of discrete radiant energy sources, or exciting a liquid crystal to influence crystal transparency or reflectivity. An image combiner/duplicator serves as an interface device for either converting two spaced apart input arrays to a combined input array or for converting an input array to two spaced apart output arrays. Interconnecting devices provide an output array having signal element digital states dependent on the states of non-corresponding input signal elements. Such devices include: a slider for translating the output array with respect to the input array; a twister for rotating the output array by a multiple of 90.degree.; an interchanger of rows and columns; an inverter of row or column element order; a magnifier responsive to a subarray of an input array; a spiller device responsive to the state of a single input element; a contractor device having an output signal element responsive to a digital 1 of any input element; a sweeper device for producing redundant rows or columns corresponding to a single input row or column. Memory devices utilizing the gates in conjunction with regenerative feedback also serve to threshold analog images. An A/D converter system converts an analog input image into bit planes. An array computer system organization includes array mask gating for performing different operations simultaneously on different image portions. | ||||||
| 213 | Transducer systems | US15440361 | 1961-11-21 | US3219996A | 1965-11-23 | MASTERS JR GEORGE W |
| 214 | Analog to digital converter using electroluminescent device | US19118562 | 1962-04-30 | US3213445A | 1965-10-19 | MARTIN BERGER; DE GRAFFENRIED ALBERT L |
| 215 | Image reproducing apparatus | US84838559 | 1959-10-23 | US2969531A | 1961-01-24 | STEWART ROBERT M |
| 216 | Sampling device with time-interleaved optical clocking | EP12167613.4 | 2012-05-11 | EP2660821B8 | 2018-12-26 | Landolt, Oliver |
| A sampling device (2) comprising a first input port (4) and a second input port (5), wherein an input-signal is fed to the first input port (4) and wherein an optical clock signal is fed to the second input port (5). The sampling device (2) comprises a plurality of track and hold units (7 1 , 7 2 , 7 N ), wherein each of the plurality of track and hold units (7 1 , 7 2 , 7 N ) is connected to the first input port (4). The plurality of the track and hold units (7 1 , 7 2 , 7 N ) is further connected to the second input port (5) through an optical waveguide (11) in such a manner that the plurality of tack and hold units (7 1 , 7 2 , 7 N ) operate in a time-interleaved mode. | ||||||
| 217 | TRANSPARENT DOUBLE-SIDED ADHESIVE SHEET HAVING POLARIZED LIGHT ELIMINATING FUNCTION | EP12815516 | 2012-06-27 | EP2733185A4 | 2015-03-04 | NIIMI KAHORU |
| In relation to a sheet having linearly polarized light eliminating function that is disposed on the viewing side of a polarizing film and eliminates linearly polarized light that has traversed the polarizing plate, proposed is a novel sheet having linearly polarized light eliminating function, allowing a layer having linearly polarized light eliminating function to be thinned, and furthermore, allowing manipulability when pasting the sheet to be satisfactory. Proposed is a transparent double-sided adhesive sheet provided with a adhesive layer on both front and back sides and provided with a layer having a linearly polarized-light-eliminating function (referred to as " linearly polarized-light-eliminating functional layer") as a middle layer, and the thickness of the linearly polarized-light-eliminating functional layer being within the range of 1 µm to 40 µm and smaller than the thickness of the adhesive layer on either the front or the back or the adhesive layers on both front and back sides. | ||||||
| 218 | Optical circuit device and method | EP09180976.4 | 2009-12-30 | EP2239621B1 | 2012-09-19 | Ezekiel, Kruglick |
| 219 | A METHOD AND DEVICE FOR GENERATING AN ELECTRICAL SIGNAL WITH A WIDE BAND ARBITRARY WAVEFORM | EP06820357.9 | 2006-11-28 | EP1958355B1 | 2012-08-15 | HEATON, John |
| A device for generating an electrical signal with a wide band arbitrary waveform comprising (i) at least two continuous wave lasers each being adapted to produce light at a different wavelength; (ii) at least one pulse generator adapted to convert the light from the lasers into optical pulse trains; (iii) a plurality of optical modulators, each modulator being adapted to receive an optical pulse train at at least one wavelength and modulate the optical pulse train in response to an electromagnetic signal; (iv) an optically dispersive element adapted to receive the optical pulse trains from the modulators and to introduce a wavelength dependent delay between the optical pulse trains; and, (v) a photodetector for receiving the modulated dispersed optical pulse trains and producing an analogue electrical signal in response thereto. | ||||||
| 220 | ULTRA-HIGH-SPEED PHOTONIC-ENABLED ADC BASED ON MULTI-PHASE INTERFEROMETRY | EP10754995.8 | 2010-07-25 | EP2457328A2 | 2012-05-30 | NAZARATHY, Moshe; TSELNIKER, Igor |
| A ultra high speed photonic Analog to Digital Converted (ADC) for sampling and quantizing an electrical voltage signal, internally enabled by photonics uses coherent optical detection architectures for photonic quantization. Coherent light is phase modulated by the test signal. Using an interferometer, or an array of interferometers the phase of modulated light is compared with a reference light. Flash ADC, successive approximation ADC and delta-sigma ADC configurations are presented. | ||||||
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