Matches 201 - 250 out of 330 < 1 2 3 4 5 6 7 >


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4365310 Optical homodyne processor  
An analog optical processor which performs complex transform operations or omplex correlations to yield quantitative (numerical) output. This is accomplished on data points which are used as...
4357676 Frequency multiplexed joint transform correlator system  
An improved joint transform correlator system frequency multiplexes two input signals to reduce the resolution along a single optical axis by one half, and uses full input transducer resolution in...
4339176 Holographic space-variant system for evaluating the ambiguity integral  
An optical system for creating the ambiguity function of a moving target is disclosed. The two signals which are to be used in the analysis are coded on spatial data masks as two-dimensional...
4331877 Transverse tomography with optical filtering  
The disclosure is directed to an apparatus and method for generating a two-dimensional back-projected image of a slice of an object, and also to an optical filtering apparatus and method which,...
4329588 Polarization switched optical filtering for transverse tomography  
The disclosure is directed to an apparatus and method for generating a two-dimensional back-projected image of a slice of an object, and also to an optical filtering apparatus and method which,...
4322808 Coding and decoding artifact-free images of objects  
A method of coding and decoding of objects by means of a large number of point-like radiation sources which are subdivided into two groups. Two recordings are made of an image object. A first...
4310894 High speed ambiguity function evaluation by optical processing  
An optical system which computes the ambiguity integral using one-dimensional spatial light modulators rather than the two-dimensional data masks or spatial light modulators used in the prior art...
4308521 Multiple-invariant space-variant optical processing  
A multiple-invariant, space variant optical processor in which two functions described by any number of separate distortion parameters can be correlated with no loss in signal-to-noise ratio of...
4306771 Optical pulse shaping device and method  
An optical pulse shaping device and methhod of shaping an optical pulse involves the use of a phase coherent multi-frequency light beam with an optical element consisting of a sample containing an...
4297704 Phase sensitive spectrum analyzer  
Apparatus is provided comprising a laser source, collimating optics for collimating light provided by the laser source, focusing optics for focusing the collimated light provided by the...
4290112 Method and apparatus for electro-optically convoluting a one-dimensional signal  
There is disclosed a method and apparatus for convoluting a signal representing a profile formed during X-ray tomography and a filter function wherein a one-dimensional image of the signal is...
4286872 Optical correlator  
An optical correlator having an imaging system for the non-contact measuring of the velocity and/or direction of motion and/or the distance of an object, and comprising at least one grating...
4286328 Incoherent optical ambiguity function generator  
An electro-optical system for performing the computation of the radar ambiguity function or other similar mathematical function using the parallel processing capability of optical systems...
4285048 Space variant signal processor  
A correlation method and apparatus for electrical signal transmission and ception of coded waveforms are disclosed which makes use of a coordinate transformation of the original waveform prior to...
4275454 Optical system phase error compensator  
A method for compensating for phase errors in an optical data processing system for performing a Fourier transformation analysis of a data source. The aberrations of the system are holographically...
4225938 Time-integrating acousto-optical processors  
Disclosed are acousto-optical information processors employing a two-dimensional, time-integrating architecture. These three-product type processors are multi-purpose processors which can perform...
4206365 Optical correlator  
The invention relates to an optical correlator comprising an optical system for imaging an object space, a spatial frequency filter disposed in or close by the image plane, and at least one...
4204262 Optical signal processing apparatus  
Signal processing apparatus having the capability to perform simultaneous space-time processing of sonar, radar and similar time-varying signals, and to effect the Fourier transform of multiple...
4198125 Method and apparatus for obtaining the doppler transform of a signal  
Method and apparatus for obtaining the doppler transform of a one-dimensional linear signal by re-arranging the signal into a two-dimensional raster form image pattern and then obtaining an...
4187000 Addressable optical computer and filter  
The disclosure describes method and apparatus for optically computing the impulse response h, transfer function H, coherence function γ, impulse coherence Γ, product Sy Hr, division 1/Sx,...
4161034 Correlation apparatus  
1. Signal handling apparatus comprising summing means adapted to receive simultaneously signals representing a function taken at one or more different phases of time, means providing...
4139277 Acousto-optic memory correlator  
An apparatus for performing the correlation of a real-time signal, and a red signal or signals, and two methods of storing signals as index of refraction variation patterns in piezoelectric...
4139897 Fast two dimensional fourier transform device  
Two dimensional optical or electrical images are processed through a storage tube designed to yield the correlation function between the input images and stored images. By generating a series of...
4135096 Electronic-optical system for X-ray object cross section image reconstruction  
An X-ray object cross section image reconstruction system wherein X-ray fan beam path attenuation signals, detected through a cross section layer of an object at a multiplicity of scan angles,...
4124280 Acoustic-optic technique for processing many signals simultaneously  
An acousto-optic apparatus utilizing multiplexing techniques, for obtaining he correlation of N pairs of signals. First and second sets of signals are combined in a piezoelectric crystal, and each...
4123142 Ambiguity plane optical processor incorporating magneto-optic, bubble domain histograph  
A system for optically correlating two signals, e.g., radar, sonar, etc., incorporating both time shifts and doppler shifts is described. The correlation of the signals is produced as a...
4110016 Acousto-optic real time correlator  
An acousto-optic correlator device comprised of two parallel piezoelectric rystals having different acoustic velocities. Acoustic transducers are located at one end of the respective crystals, and...
4107701 Acousto-optic snapshot recorder  
Apparatus for recording a serial line of electrical data as a spatial array of optical data. The apparatus employs an acousto-optic device through which the electrical signal to be recorded is...
4099249 Doppler processing method and apparatus  
A method and apparatus for determining the value of a Doppler frequency shift component Δf present in a signal f ± Δf employing a correlation process which utilizes the Mellin transform and is...
4089589 Optical signal processing system and method  
The optical system includes a point source of monochromatic light which is focused by a first lens onto a frequency plane. A pair of transparencies bearing information in a single-axis...
4084255 Positional, rotational and scale invariant optical correlation method and apparatus  
A method and electro-optical apparatus for correlating two functions, f1 (x,y) and f2 (x,y) which are shifted, scaled and rotated versions of each other without loss of signal-to-noise and...
4073010 Correlation methods and apparatus utilizing mellin transforms  
Correlation methods and apparatus are disclosed which make use of Mellin transforms that are scale and shift invariant. There is no loss in the signal-to-noise ratio of the correlation, and data...
4071907 Radar signal processor utilizing a multi-channel optical correlator  
A real-time radar processor utilizing a coherent optical system for provig target fine range and Doppler/azimuth angle data with increased signal-to-noise and signal-to-clutter ratios. Radar...
4039815 Electro-optical correlator  
A system for electro-optically correlating two signals. A running representation of the amplitude variation of a first signal is observed through a mask representing the amplitude variation of a...
4020281 Iterative coordinate data approximation system for photoemissive pixel pattern displays  
Almost any Photoemissive Pixel Pattern Display Tube (PPDT) System, such as one for a Photoemmisive Matrix Display Tube (PMDT) display system is capable of supplying an indication of coordinate...
4012120 Guided wave acousto-optic device  
An acousto-optic device suitable as a correlator, convolution integrator or Fourier transform device. The device comprises a piezoelectric substrate or crystal such as lithium niobate. The...
3996467 Data acquisition in tomography  
In an apparatus for examining a body with penetrating radiation a source and detector arrangement scan about the body to irradiate the body along a plurality of beam paths lying in a plane. Output...
3971921 Apparatus for distinguishing time varying analog signals  
An optical scanner having a narrow instantaneous field of view optically scans an entire field of view to determine if a particular source of optical radiation is in the field of view. A first...
3956728 Signal correlation system  
1. A pulse correlation readout system for a track of light modifying marks formed in a recording medium comprising a light source positioned to direct light onto the recording medium, a mask...
3937942 Multi-channel optical correlation system  
A multi-channel optical correlation system employs a light source to illuminate a mask having a plurality of linearly disposed channels, each of which has recorded information defined by...
3909602 Automatic visual inspection system for microelectronics  
A system for automatically inspecting an integrated circuit, including a device for shining a scanning narrow light beam at an integrated circuit to be inspected and another light beam at an...
3903407 Method for correlating frequency-modulated signals  
Apparatus and method for correlating frequency-modulated signal wavetrains ith their return signal wavetrains which includes compensating for delay distortions in the signal while passing through...
3889233 Character coincidence detector for optical information retrieval systems  
In an optical information retrieval system, the method of detecting the coincidence between an information to be retrieved that has been stored as a hologram and an interrogation information,...
3822379 RADIO FREQUENCY PULSE GENERATOR-CORRELATOR  
A source of continuous wave laser energy interrogates an interaction medium into which a source of acoustic pulses in the radio frequency (RF) range is injected. A variably coded birefringence is...
3816735 MULTI-CHANNEL OPTICAL CORRELATOR SYSTEM  
A multi-channel optical correlation system employs non-coherent light to illuminate a mask having a plurality of linearly disposed channels, each of which has recorded information defined by...
3809873 OPTICAL PROCESSOR FOR CONVOLUTION FILTERING  
This invention comprises apparatus for optical processing of two dimensional convolution integrals of a signal function with a filter function. It makes use of specific adaptations of an optical...
3802762 COHERENT OPTICAL MULTICHANNEL CORRELATOR  
A coherent optical multichannel correlator for identifying an object to be investigated by permeating the object with a beam of coherent radiation which is received by a transformation element and...
3796908 ELECTROOPTICAL CORRELATOR TUBE HAVING A REAR TARGET MESH ELECTRODE  
An electron discharge device of the image orthicon type having a storage target member and adjacent target mesh electrode provided with a substantially similar mesh electrode on the opposing side...
3790926 METHOD FOR DETERMINING THE SPEED OF A VEHICLE  
A method of determining the speed of vehicle, particularly a ship by the transmission of coherent waves, with echo signals being received at a plurality of points along a receiving line extending...
3768907 SCANNING APERTURE PARTIALLY COHERENT OPTICAL CORRELATOR  
A partially coherent optical correlator of, for example, the frequency pl type, has a slit of adjustable width that moves rapidly in the spatial domain P1 to scan a portion of the input signal...

Matches 201 - 250 out of 330 < 1 2 3 4 5 6 7 >