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7616323 |
Interferometer with multiple modes of operation for determining characteristics of an object surface
Disclosed is a system including: (i) an interferometer configured to direct test electromagnetic radiation to a test surface and reference electromagnetic radiation to a reference surface and...
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7616321 |
Optical coupler for rotating catheter
An optical coupler for coupling to a rotating catheter has a housing with a rotatable distal face and a stationary proximal face. The distal face has an eccentric port and a central port. A lens is...
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7605925 |
High-definition vertical-scan interferometry
A broadband interferometric vertical scan of a sample surface is performed to produce interference data in conventional manner. A coarse surface profile of the surface is obtained in real time...
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7602501 |
Interferometric synthetic aperture microscopy
Methods and apparatus for three-dimensional imaging of a sample. A source is provided of a beam of substantially collimated light characterized by a temporally dependent spectrum. The beam is...
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7602500 |
Optical coherence imaging systems having a reduced effective linewidth and methods of using the same
Frequency domain optical coherence imaging systems have an optical source, an optical detector and an optical transmission path between the optical source and the optical detector. The optical...
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7595889 |
Systems and methods for endoscopic angle-resolved low coherence interferometry
Fourier domain a/LCI (faLCI) system and method which enables in vivo data acquisition at rapid rates using a single scan. Angle-resolved and depth-resolved spectra information is obtained with one...
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7589842 |
Optical tomograph for automatically adjusting optical path length differences
An optical tomograph obtains tomographic images by administering frequency analysis on an interference light beam formed by interference between a reflected light beam, which is a measuring light...
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7586620 |
Methods and systems for interferometric analysis of surfaces and related applications
A method for determining a spatial property of an object includes obtaining a scanning low coherence interference signal from a measurement object that includes two or more interfaces. The scanning...
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7583389 |
Geometric measurement system and method of measuring a geometric characteristic of an object
A geometric measurement system is adapted to precisely measure one or more surfaces of objects such as corneas, molds, contact lenses in molds, contact lenses, or other objects in a fixture. The...
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7583386 |
Method and apparatus for optically analyzing a surface
In one embodiment, a system to measure defects on a surface of a wafer and an edge of the wafer using a single tool comprises a radial motor to move an optical head in a radial direction to detect...
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7576869 |
Three-dimensional shape measurement method and three-dimensional shape measurement apparatus
The present invention provides a three-dimensional shape measurement method and a three-dimensional shape measurement apparatus. Color luminance data I (x, y) is separated by an arithmetic...
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7570366 |
Apparatus for measuring defects in a glass sheet
A method of measuring the topography of a large, thin, non-flat specular substrate in a production environment with minimal movement of a majority of the measurement apparatus. A gimbal-mounted...
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7570364 |
Optical tomographic imaging apparatus
Light beams swept in wavelength repeatedly within first and second wavelength ranges respectively are outputted from a light source unit at the same time. Each light beam is split into measuring...
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7567349 |
Speckle reduction in optical coherence tomography by path length encoded angular compounding
Speckle, a factor reducing image quality in optical coherence tomography (“OCT”), can limit the ability to identify cellular structures that are important for the diagnosis of a variety of...
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7564565 |
Wavelength-tunable light generator and optical coherence tomography device
The present invention provides an OCT technique that permits tomographic observation of a biological body parts that is difficult to restrain and also provides a tomographic observation technique...
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7557931 |
Optical coherence tomography method
Low coherence light is divided into measuring light and reference light. The measuring light is collected to be projected onto an object of measurement. Intensities of the reflected light in a...
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7557928 |
Apparatus using optical coherence tomography based on spectral interference, and an ophthalmic apparatus
An apparatus using optical coherence tomography based on spectral interference and an ophthalmic apparatus, which can accurately obtain information on an object in a depth direction by correcting...
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7554671 |
Absolute position measurement apparatus
A first beam having high coherence and a second beam having low coherence and having a central wavelength difference from that of the first beam are multiplexed onto the same optical axis. First...
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7554669 |
Spectral domain phase microscopy (SDPM) dual mode imaging systems and related methods and computer program products
Some embodiments of the present invention provide optical coherence tomography systems including an OCT engine and a processor. The OCT engine is configured to provide both standard OCT imaging and...
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7554668 |
Light source for swept source optical coherence tomography based on cascaded distributed feedback lasers with engineered band gaps
The present invention is a tunable semiconductor laser for swept source optical coherence tomography, comprising a semiconductor substrate; a waveguide on top of said substrate with multiple...
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7551293 |
Method and apparatus for three-dimensional spectrally encoded imaging
A method and apparatus for providing information associated with at least one portion of a sample can be provided. For example, at least one wavelength of electro-magnetic radiation provided on a...
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7548320 |
Optical image measuring apparatus
An optical image measuring apparatus including: a beam splitter ( 4 ) for dividing a light beam into signal light (S) and reference light (R); beam splitters for dividing the reference light (R)...
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7545506 |
Interferometric measuring device
The present invention relates to an interferometric measuring device having a short-coherent radiation source, a modulation interferometer and a downstream reference interferometer connected...
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7545505 |
Device and method for a combined interferometry and image-based determination of geometry, especially for use in micro system engineering
The apparatus according to the invention comprises an object lens which can operate in at least two different measuring modes. In a first, interference mode a workpiece is measured by means of...
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7542148 |
Method for measuring physical quantity of measurement object in substrate processing apparatus and storage medium storing program for implementing the method
A method capable of accurately measuring a physical quantity of a measurement object in a substrate processing apparatus. In a temperature measurement apparatus for implementing the method, two...
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7538887 |
Temporal interferometric signal modeling with constant phase shift in white light interferometry
A method for determining the surface topography of an object with various surface properties in white light interferometry first generates a set of interferograms, produced by a phase shift driving...
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7538886 |
Common path time domain optical coherence reflectometry/tomography device
In common path time domain OCT/OCR devices optical radiation from a source is first split into two replicas, which are then delivered to an associated sample by an optical fiber probe. The tip of...
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7525666 |
Interferometric measuring device
An interferometric measuring device, especially for measuring the shape of a surface of an object, includes a radiation source emits a short coherent electromagnetic radiation, a component, in...
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7522288 |
Compensation of systematic effects in low coherence interferometry
In general, in one aspect, the invention features a method that includes transforming interferometry data acquired for a test sample using a low coherence imaging interferometry system to a...
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7518734 |
Apparatus and method of measuring thickness of lingual fur and acquiring vertical section image thereof
A method of acquiring a vertical section image of lingual fur, and an apparatus to perform the method, the method including generating interfering light from irradiated light and light reflected...
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7515276 |
High resolution interferometric optical frequency domain reflectometry (OFDR) beyond the laser coherence length
The technology described here enables the use of an inexpensive laser to measure an interferometric response of an optical device under test (DUT) at reflection lengths significantly greater than...
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7515274 |
Method for obtaining the image of an object, device for carrying out said method and device for delivering low coherent optical radiation
The invention relates to studies of internal structures of objects with the aid of optical means. According to the invention an optical system ( 15 ) of the delivering device for low coherence...
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7513619 |
High resolution laterial and axial tomography
An in-vivo high resolution lateral and axial tomography system of the retina, is provided, including a Michelson interferometer, generating a tomographical image by full field OCT interference with...
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7508525 |
High efficiency balanced detection interferometer
An interferometer configured for use in optical coherence domain (OCT) reflectometry systems is disclosed. In the preferred embodiments, efficient routing of light and a balanced detection...
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7493227 |
Method for determining the complex scattering function of an optical coherence tomography sample
A method determines the complex scattering function of a portion of a sample under analysis. The method includes providing a magnitude spectrum of a complex spatial Fourier transform of a complex...
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7492466 |
Optical image measuring apparatus and optical image measuring method
Provided is an optical image measuring apparatus forming a three-dimensional image based on tomographic images of an object, acquired at various depths even when the object moves during...
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7489405 |
Optical coherence tomography
An optical coherence tomography system includes an optical source has an emission wavelength in the range of 1.6 μm to 2.0 μm, in particular having an infrared emission predominantly at a...
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7486406 |
Variable tomographic scanning with wavelength scanning digital interface holography
A series of holograms is recorded by synchronizing a camera with laser pulses under the control of a digital delay generator. Amplitude and phase images are calculated while image distances are...
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7486405 |
Optimized reference level generation
A method, apparatus and system for optimizing the magnitude of reference levels in non-invasive imaging and analysis is disclosed. Optimizing the magnitude of reference levels enables improving...
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7483147 |
Apparatus and method for measuring thickness and profile of transparent thin film using white-light interferometer
Disclosed herein is an apparatus and method for measuring the thickness and profile of a transparent thin film using a white-light interferometer. The apparatus and method separate coherent light...
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7480059 |
Optical coherence tomography for eye-length measurement
An accurate measure of eye length can be obtained using concurrent OCT measurements. A position OCT device can be used to continually monitor the position of the front surface of the cornea, while...
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7480058 |
Fourier-domain optical coherence tomography imager
A Fourier-domain optical coherence tomography (OCT) imager is presented. An OCT imager according to the present invention can have an auto-alignment process. The auto-alignment process...
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7480057 |
Interferometric device
Device for white light interferometry comprising a light source of main emission wavelength λ 0 and spectral width Δλ and an evaluating unit with a line sensor of pixel width P for detecting an...
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7477399 |
Inner surface measuring apparatus
An inner surface measuring apparatus includes: a low coherent light source that outputs low coherent light; a low coherent light dividing section that divides one portion of the low coherent light;...
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7468799 |
Scanning interferometry for thin film thickness and surface measurements
A method including: providing a low coherence scanning interferometry data for at least one spatial location of a sample having multiple interfaces, wherein the data is collected using a low...
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7466429 |
Profiling complex surface structures using scanning interferometry
A method including comparing information derivable from a scanning interferometry signal for a first surface location of a test object to information corresponding to multiple models of the test...
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7466427 |
Vibration-resistant interferometer apparatus
A half mirror 4 divides a luminous flux emitted from a low-coherence light source 1 into two luminous fluxes, a secondary reference plate 6 is held integrally with a reference plate 16 , and...
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7463362 |
Digital signal processor-based detection system, method, and apparatus for optical tomography
The present invention provides systems, methods and apparatuses that perform digital detection for use in optical tomography. Methods and systems are provided in which digital lock-in detection is...
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7460248 |
Tissue imaging system
A tissue imaging system ( 200 ) for examining the medical condition of tissue ( 290 ) has an illumination optical system ( 205 ), which comprises a light source ( 220 ), having one or more light...
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7456975 |
Methods and systems for interferometric analysis of surfaces and related applications
A method for determining a spatial property of an object includes obtaining a scanning low coherence interference signal from a measurement object that includes two or more interfaces. The scanning...
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