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8896840 Interferometric method and digital holographic microscope  
An interferometric method for detecting information about a sample includes emitting a laser beam; splitting the laser beam into a reference beam and an object beam; transmitting the object beam...
8830476 Methods and apparatuses for contact-free holographic imaging of aerosol particles  
Methods and apparatuses provide holographic contact-free imaging of aerosol particles in an efficient manner. One apparatus for holographic imaging of an aerosol particle may include: a delivery...
8813550 Shearographic imaging machine and method  
A tire inspection machine includes an incoming conveyor adapted to transport tires to the machine and also align the tires in a transverse direction. An inspection table of the machine includes a...
8791985 Tracking and characterizing particles with holographic video microscopy  
In-line holography to create images of a specimen, such as one or more particles dispersed in a transparent medium. Analyzing these images with results from light scattering theory yields the...
8687184 Reference cell  
Reference cell (8) for use with a fiber optic probe (1) comprising a base wall (11), upstanding walls (12) each having an optical window (13, 15), and a top wall (14) having a further optical...
8477315 Volume hologram, light source device, illumination device, monitor, and image display device  
A volume hologram includes: an incidence surface onto which coherent light having a plurality of wavelengths is incident; and a plurality of interference fringes having streaks so that the angles...
8451450 Near real time optical phase conjugation  
An optical system and associated method enable near real time optical phase conjugation. In the method, a translucent medium is illuminated by a sample illumination beam. Light scattered by the...
8405059 Method and apparatus for improving the resolution and/or sectioning ability of an imaging system  
Embodiments of the invention allow the operation of confocal microscopes with relatively open pinholes (e.g. 1 Airy unit) whilst still giving a significant XY resolution improvement. In addition...
8115933 Interferometer for optically measuring an object  
An interferometer for optically measuring an object (10), including a light source (1), at least one beam splitter (2) and at least one detector (12a, 12b), with the beam splitter being arranged...
7948632 Method and apparatus for analysis of a sample of cells  
A non-destructive method and device for analyzing a sample comprising transparent living and/or dead cells, by 5 means of a digital holographic microscope, where the sample (8) is exposed to light...
7812959 Total internal reflection holographic microscope  
The present invention provides for a digital holographic microscope using a holographic interferometer and incorporating a TIR sample mount and microscopic imaging optics. The microscope uses...
7725169 Contrast enhanced spectroscopic optical coherence tomography  
A method of forming an image of a sample includes performing SOCT on a sample. The sample may include a contrast agent, which may include an absorbing agent and/or a scattering agent. A method of...
7643149 Method of aligning an optical system  
A method of manufacturing an optical system having plural optical elements mounted relative to each other on a mounting structure of the optical system comprises disposing the optical system in a...
7639365 Confocal scanning holography microscope  
A confocal scanning holography microscope for use with a suitably selected detector for providing three dimensional information on the state of an object. The microscope has a coherent wavelength...
7145659 Light interference measurement method using computer-generated hologram, and interferometer using this method  
The present invention makes it possible to reliably hold a computer-generated hologram 17 and a sample surface 18a in ideal design positions and to perform interference measurements on the surface...
7072042 Apparatus for and method of measurement of aspheric surfaces using hologram and concave surface  
An aspheric surface measuring apparatus includes an interferometer which generates incident light; a test piece having an aspheric surface from which the incident light is reflected as test light;...
6963406 Fused off-axis object illumination direct-to-digital holography with a plurality of illumination sources  
Systems and methods are described for rapid acquisition of fused off-axis illumination direct-to-digital holography. A method of recording a plurality of off-axis object illuminated spatially...
6930783 Method of aligning optical system using a hologram and apparatus therefor  
A method of aligning an optical system and an optical system incorporating the method. A hologram element is installed in the optical system so that test beams diffracted by the hologram element...
6922483 Methods for measuring DMD low frequency spatial uniformity  
Methods for measuring the low spatial reflectivity uniformity of a DMD spatial light modulator. These methods are unique since they compensate for the non-uniformities introduced by the tilt angle...
6885449 Optical inspection system based on spatial filtering using a refractive-index-grating  
An optical inspection system (10) for comparing surface structures of test and reference objects comprises a laser (12), a photorefractive crystal (24) and a detector (30). A refractive index...
6870946 Compact optical fingerprint capturing and recognition system  
An apparatus and method for acquiring an image of a patterned object such as a fingerprint including a light refracting device, a focusing lens, a light source, and a biometric circuit for...
6791695 Shearographic imaging machine with archive memory for animation data and air handling system  
The invention relates to an apparatus for performing electronic shearography on a test object, especially a tire or retread tire. The apparatus uses a laser light source to illuminate the test...
6765677 Method and device for non-destructive real-time measurements of residual stresses in planar and non-planar objects  
This invention relates to a method and device for performing non-destructive measurements of residual stresses in an investigation area of an object based on use of optical holographic...
6724483 Method for three-dimensionally, optically measuring measuring objects  
A method is for three-dimensionally, optically measuring measuring objects by comparison with a reference object, where image data of the measuring object are acquired and compared to image data...
6674531 Method and apparatus for testing objects  
With interferometric test systems, the test object is frequently measured over several sections in order to realize a complete test. If special structural features are found, in particular...
6628399 Method and device real time non-destructive determination of residual stresses in objects by the optical holographic interferometry technique  
This invention relates to a method and device for non-destructive testing of details, machine units and mechanisms, various materials, and in particular, to a method and device for non-destructive...
6559948 Method for locating a structure using holograms  
A structure (22) is located relative to a reference surface (26a, 42) using an optical target (28) affixed to the structure (22) and having a reflective angular-reference hologram (30) thereon...
6480284 Multiple plane reference mirror for interferometric testing of optical systems  
An interferometric testing system for testing an optical system includes an interferometer which outputs a light beam and analyzes the returned light beam, and a multiple plane reference mirror...
6469791 Multi-aperture hologram for backwards testing of optical systems  
An interferometric testing system and method employing a multiple-aperture hologram. In an illustrative embodiment, the inventive optical testing system includes an interferometer which outputs a...
6433874 Electronic shearography apparatus for producing animation of shearogram images  
The invention relates to an apparatus for performing electronic shearography on a test object, especially a tire or retread tire. The apparatus uses a laser light source to illuminate the test...
6356854 Holographic object position and type sensing system and method  
Systems and methods for determining the position and classification of an object and which may provide signals that control deployment of an active restraint device, for example. Using a pulsed...
6348967 Method and device for measuring the thickness of opaque and transparent films  
A method for determining the thickness of a thin sample is described. The method includes the step of exciting time-dependent acoustic waveguide modes in the sample with an excitation radiation...
6307635 Phase-shifting point diffraction interferometer mask designs  
In a phase-shifting point diffraction interferometer, different image-plane mask designs can improve the operation of the interferometer. By keeping the test beam window of the mask small compared...
6219143 Method and apparatus for analyzing shearogram images by animation  
The invention relates to an apparatus for performing electronic shearography on a test object, especially a tire or retread tire. The apparatus uses a laser light source to illuminate the test...
6163378 Spectroscopic time integrative correlation for rapid medical diagnostic and universal image analysis  
A spectrum analyzer for producing a first two-dimensional array of time varying spectral analysis image input signals, a reference image generator for producing a second two-dimensional array of...
6151564 Coded object system and code recognition methods  
Disclosed is a method of characterizing a coded object having a plurality of regions. A luminosity value of a first region of the coded object is compared to a luminosity value of a second region...
6118535 In Situ alignment system for phase-shifting point-diffraction interferometry  
A device and method to facilitate the gross alignment of patterned object- and image-plane masks in optical systems such as the phase-shifting point diffraction interferometer are provided. When...
6043870 Compact fiber optic electronic laser speckle pattern interferometer  
Material defects and damage are detected and evaluated by stressing the material and looking for flaw-induced anomalies in a fringe pattern generated by the interference between two coherent laser...
5991461 Selection process for sequentially combining multiple sets of overlapping surface-profile interferometric data to produce a continuous composite map  
The process of combining various sets of measured data is carried out by first selecting a section of the test surface and its data set as the starting point and comparing the regions of overlap...
5963310 Surface imaging skin friction instrument and method  
A surface imaging skin friction instrument allowing 2D resolution of spatial image by a 2D Hilbert transform and 2D inverse thin-oil film solver, providing an innovation over prior art single...
5777742 System and method for holographic imaging with discernible image of an object  
A system and method for three-dimensional imaging utilize a lens to perform a two-dimensional Fourier transform of an interference pattern while focusing the pattern on a two-dimensional detector...
5760902 Method and apparatus for producing an intensity contrast image from phase detail in transparent phase objects  
A method and apparatus for producing images in which phase variation introduced by reflections from a transparent phase object are represented in interference generated phase contrast, and in...
5684588 Homodyne and hetrodyne imaging in a light scattering medium  
Image derogating optical noise due to light scattering of an object under amination, embedded in, or positioned in front of a light scattering medium, is substantially reduced by employing a...
5680212 Sensitive and fast response optical detection of transient motion from a scattering surface by two-wave mixing  
A method and apparatus are provided of optically detecting transient motion from the surface of a workpiece. After directing a laser beam onto a surface of a workpiece the beam is reflected from...
5563704 Camera and method for holographic interferometry using an erasable photosensitive photopolymer film  
A camera apparatus and method of use employing a photosensitive photopolymer film as a recording medium for generating an interferogram through the use of a write laser beam and a read laser beam....
5546186 Apparatus for holographic interferometry suitable for inspection of cylindrical optical surfaces  
A holographic interferometry apparatus for inspecting cylindrical optical surfaces. Laser light is split into regular reflection light and diffraction light by a holographic optical element. A...
5530547 Method and apparatus for aligning optical elements and testing aspheric optical components  
The present invention is directed to an apparatus for aligning optical elements and a method used to test aspheric components using a conventional interferometer. The apparatus comprises an...
5519486 Method of creating holographic interferograms for structural examination of composites in sheet metal surfaces  
In-situ, nondestructive examination to test the efficacy of a riveted, bolted or bonded join of metal sheets, or to test whether a composite material is faulted, or to test whether a multi-layer...
5508801 Method and apparatus for nondestructive testing of the mechanical behavior of objects under loading utilizing wave theory of plastic deformation  
A new method of nondestructive testing of mechanical behaviors of objects under loading has been invented based upon the analysis of spatial and temporal distributions of velocities of deformation...
5448352 Method and apparatus for the nondestructive testing of vessels made of composite material wound on a metallic liner by means of holographic interferometry  
A vessel made of composite material wound on a metallic liner is tested via holographic interferometry, in which the interference of two holographic images of a tested zone are taken under two...

Matches 1 - 50 out of 144 1 2 3 >