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| Number | Title | Issue Date |
| 8078663 | Optical correlation apparatus and method This invention relates to a pattern recognition correlator and method for correlating input data with one or more reference data sets. The input data, which may be for instance digital amplitude modulated optical data, is used to modulate an optical signal to form a... | 12/13/2011 |
| 7437392 | Transitioning a filter function of a two-port lattice-form planar waveguide optical delay line circuit filter from a start filter function to a target filter function Optically coherent, two-port, serially cascaded-form optical delay line circuits can realize arbitrary signal processing functions identical to those of FIR digital filters with complex filter coefficients whilst maintaining a maximum optical transmission characteri... | 10/14/2008 |
| 7355769 | Method and apparatus for single-photon source and quantum memory An optical switch and optical storage loop are used as the basis of a single-photon source and a quantum memory for photonic qubits. To operate as a single-photon source, the techniques include a source of a pair of photons, such as a parametric down-conversion crys... | 04/08/2008 |
| 7335874 | Method and apparatus for generating a circularly polarized illumination beam A method and apparatus for illuminating a subject with deep UV light and detecting 2-dimensional image information, e.g., a transmission image, fluorescence image, reflected light image, etc. The subject may be illuminated with a light pulse having a duration of 2 s... | 02/26/2008 |
| 7333182 | Range finder and method of reducing signal noise therefrom A range finder includes an optical sensor circuit including optical sensors and an integrator circuit disposed for the optical sensors. It further includes selection switches (MOSFETs), which selectively connect optical sensors to the integrator circuit, non-selecti... | 02/19/2008 |
| 7317417 | Methods for detection and tracking of targets The present invention relates to active sensor applications, and more particularly is directed to efficient systems and methods for detection and tracking of one or more targets. The invention provides a method for receiving signals reflected from one or more target... | 01/08/2008 |
| 7315276 | Beam compression radar A concept is described for broadening the beam of a phased array radar antenna to provide continuous illumination of all radar targets within the search space, and this beam is compressed upon reception to realize the angular resolution that is possible with the ant... | 01/01/2008 |
| 7295200 | Computer generated hologram display system A method of displaying a computer generated hologram includes displaying the image as a set of facets that approximated to the true shape of the object to be displayed. Each of these facets is populated with points that together make up the image. The invention prov... | 11/13/2007 |
| 7262765 | Apparatuses and methods for utilizing non-ideal light sources A method includes obtaining a measurement of a property of a light source, scanning light from the light source onto a surface, such that the light interacts with the surface, detecting light from the surface to create a picture element, and correcting the picture e... | 08/28/2007 |
| 7236667 | Techniques for use of nanocavities to enhance quantum processing with photons and the Zeno effect Techniques are provided for placing atoms inside an appropriate nanocavity for enhancing two-photon absorption and quantum information processing based on the Zeno effect. Techniques for fabricating suitable nanocavities include: 1) a short length of optical fiber p... | 06/26/2007 |
| 7231094 | Low-power signal processing using MEMS Apparatus and methods for performing a Fourier transform mechanically, using an array of one or more resonators. By tuning the resonators so that their natural frequencies correspond to harmonics of an input signal, the vibration of the resonators in response to the... | 06/12/2007 |
| 7212323 | Methods and apparatus for mass manufacturing two-dimensional binary information on transparent substrates using phase contrast modulated templates Methods and apparatus for making, encoding, and encrypting binary patterns for storing recorded information. One of the methods includes the steps of providing an original image, fragmenting the original image into at least two parts including a first part and a sec... | 05/01/2007 |
| 7174058 | Traveling-wave optoelectronic wavelength converter Traveling-wave optoelectronic wavelength conversion is provided by a monolithic optoelectronic integrated circuit that includes an interconnected traveling-wave photodetector and traveling-wave optical modulator with a widely tunable laser source. Either parallel an... | 02/06/2007 |
| 7130292 | Optical processor enhanced receiver architecture (opera) A method and apparatus for enhancing the receiving and information identification functions of multiple access communications systems by employing one or more optical processors configured as a bank of 1-D correlators. The present invention is particularly useful in... | 10/31/2006 |
| 7082451 | Reconfigurable vector-FFT/IFFT, vector-multiplier/divider Systems and methods are described for providing a reconfigurable circuit having multiple distinct circuit configurations with respective distinct operating modes The circuit may be controllably configures to perform a fast Fourier transform function, a multiplier fu... | 07/25/2006 |
| 7053814 | RF lightwave coding system for radar pulse compression An apparatus for preparing a RF radar transmit waveform and for decoding RF return waveforms comprising: a RF-lightwave encoder and a decoding preprocessor to phase-encode the RF radar transmit waveform and partially decode the return signal, the encoder including s... | 05/30/2006 |
| 6995404 | Techniques for quantum processing with photons and the zeno effect Techniques are provided that use the quantum Zeno effect to implement practical devices that use single photons as the qubits for quantum information processing. In the quantum Zeno effect, a randomly-occurring event is suppressed by frequent measurements to determi... | 02/07/2006 |
| 6970900 | Optical system for certain mathematical operations An optical system utilizing phosphors to perform mathematical operations without the direct or necessary use of an electronic component or electrical power source is disclosed. The luminenscent and quenching properties of phosphors are combined with at least one fir... | 11/29/2005 |
| 6911637 | Wavefront phase sensors using optically or electrically controlled phase spatial light modulators Systems for optical wavefront sensing and control based on a phase contrast Fourier domain filtering technique. Optically or electronically controlled phase spatial light modulators (SLM) are used as the Fourier domain filter. A direct adaptive-optic feedback system... | 06/28/2005 |
| 6909808 | Image compression to enhance optical correlation The present invention is in the area of optical correlation. Embodiments of the invention encompass systems of process and/or equipment to compress images for optical correlation. Further embodiments of the invention may compress images to correlate objects and grid... | 06/21/2005 |
| 6870554 | Maskless lithography with multiplexed spatial light modulators Imaging systems that use a spatial light modulator (SLM), such as maskless lithography systems using a digital micromirror device (DMD), suffer from low throughput at high resolution because of the increase in the number of pixels to be imaged. A possible solution t... | 03/22/2005 |
| 6854004 | Irregular optical interconnections to compensate for non-uniformities in analog optical processors Using irregular optical interconnections to compensate for non-uniformities in analog optical processors, such as matrix-vector (M-V) optical processors, is disclosed. An M-V processor of one embodiments includes two optical devices, such as spatial light modulators... | 02/08/2005 |
| 6466961 | Methods for adapative spectral, spatial and temporal sensing for imaging applications A method for adaptive spectral sensing developed for a two-dimensional image made up of picture elements. The method calls for illuminating at least one of the picture elements with an input light and deriving a time-varying spectral signal from the input... | 10/15/2002 |
| 6404535 | Optically implemented wideband complex correlator using a multi-mode imaging device An optically implemented wide bandwidth correlation system (10) that employs a multi-mode imaging device (42) and a particular modulation format to provide both in-phase and quadrature phase correlation components in a single correlation process. The corr... | 06/11/2002 |
| 6343307 | Synthesis of light beams A method and system for synthesizing a desired light beam including calculating a two-dimensional light filter for an optical element, the two-dimensional light filter being such that the optical element produces under free space propagation, in response ... | 01/29/2002 |
| 6247037 | Optical correlator having multiple active components formed on a single integrated circuit An optical correlator includes a compound electro-optical component having a first and a second reflective spatial light modulator for forming electro-optical patterns of light. Each spatial light modulator has a reflective backplane with the reflective b... | 06/12/2001 |
| 6163403 | High output reflective optical correlator having a folded optical axis using grayscale spatial light modulators An optical correlator system having a plurality of both active and passive reflective optical components between a source of electromagnetic radiation, such a visible coherent light, and an output detector array in a planar support body along a folded opt... | 12/19/2000 |
| 5987188 | Space integrating sliding image optical correlator An optical correlator includes at least one electrically addressable liquid crystal array, at least one LED array for generating a reference image which is modulated by changing the transmissivity of the liquid crystals in the liquid crystal array, and at... | 11/16/1999 |
| 5955993 | Detection of spread spectrum signals A spread spectrum signal detection system comprising two spatially separated receivers, a correlator, such as a time integrating correlator employing acousto-optic cells, which is connected to the outputs from the two receivers to produce a signal represe... | 09/21/1999 |
| 5943170 | Adaptive or a priori filtering for detection of signals corrupted by noise A method for pattern recognition and localization using a joint transform correlator and joint transform correlator. The method includes providing a joint image of a reference image and an input scene image at the input plane of the correlator, receiving ... | 08/24/1999 |
| 5903390 | Two port nonlinear joint transform correlator An all optical photorefractive holographic joint transform correlator provides a first correlation plane output port using two-beam coupling, and a second correlation plane output port employing four-wave mixing. With appropriate input beam intensity rati... | 05/11/1999 |
| 5815597 | Binary encoding of gray scale nonlinear joint transform correlators A joint Fourier transform optical correlator is disclosed which can have varying degrees of nonlinearity and yet employ a readily available binary spatial light modulator for producing the correlation output light signal in conjunction with a Fourier tran... | 09/29/1998 |
| 5812292 | Optical correlator using optical delay loops An optical correlator is disclosed that compares signals of interest with lected reference signals stored in holograms. The holograms are arranged so that the selected reference signals impinge onto the plane of the entrance of fiber optics arranged with ... | 09/22/1998 |
| 5805317 | Acousto-optic channelizer-based ultra-wideband signal processor An ultra-wideband signal processor, such as that employed for processing narrow time domain radar return pulses, includes a coherent acousto-optic Bragg cell channelizer having a plurality of IF outputs from which a plurality of IF output signals respecti... | 09/08/1998 |
| 5736958 | Image synthesis using time sequential holography A method and apparatus for producing an image of a target area, by: at an observation location spaced from the target area, transmitting a beam of electromagnetic radiation toward the target area, and receiving reflections of the radiation from the target... | 04/07/1998 |
| 5701396 | Multimode-laser for an optical information processing system such as a neural net An optical information processing system comprises a coding unit for individually coding a plurality of optical information carrier waves, and a processing unit for processing the plurality of coded waves. The processing unit has a laser for producing las... | 12/23/1997 |
| 5699449 | Method and apparatus for implementation of neural networks for face recognition A method and apparatus for implementation of neural networks for face recognition is presented. A nonlinear filter or a nonlinear joint transform correlator (JTC) employs a supervised perceptron learning algorithm in a two-layer neural network for real-ti... | 12/16/1997 |
| 5614834 | Sampling receivers A Golay sampling receiver is used for optical sampling of voltage and charge at the internal nodes of analog and digital integrated circuits. The sampling receiver uses very high sampling rates together with narrow banding to recover very small signals in... | 03/25/1997 |
| 5608664 | Method for correlating image data of a range-finder Corrective data for left and right sensor arrays of a range-finding optical system is stored as a difference between a maximum sensor output and a correction function. The stored data is taken while imaging a blank white target area. In use, the correctiv... | 03/04/1997 |
| 5587829 | Method and apparatus for signal filtering A signal filter, and method of signal filtering, in which an optical signal s spatially dispersed according to frequency, and undesired frequencies blocked out. In an embodiment, a Bragg cell receives a (typically microwave) signal, and transduces it to an... | 12/24/1996 |
