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Articles for category "Patents"
Method and apparatus for full phase interferometry
PatFT, AppFT (Jul 1 2008)
Patents
BACKGROUND OF THE INVENTION1. Field of the Invention (Technical Field)The present invention relates to the field of full phase interferometry wherein the phase of the interferogram is recovered from only intensity measurements. Applications of the invention include phase-shifting interferometry, Fourier domainoptical coherence tomography, and Fourier domain optical coherence reflec
Method and arrangement for optical coherence tomography
PatFT, AppFT (Jul 1 2008)
Patents
FIELD OF THE INVENTION The present invention relates to the field of medical imaging, and more particularly to optical coherence tomography (OCT). BACKGROUND AND PRIOR ARTOCT is a known technique for non invasive cross-sectional imaging in biological systems. OCT uses coherence interferometry to produce a two-dimensional image of optical scattering from internal tissue micro structures in a way that is analogueto ultra sonic pulse-echo imaging.In coherence reflectrometry, the coherence property ...
Interferometric Method And Instrument For Measurement And Monitoring Blood Glucose Through Measurement Of Tissue Refractive Index (Wo 2008/076228)
A method of measuring glucose concentration in tissue includes measuring scattering coefficients of the tissue at each of a plurality of temperatures and at a selected tissue depth using optical coherence tomography, and determining the glucose concentration in interstitial fluid of the tissue as a function of the measured scattering coefficients.
A method of measuring glucose concentration in tissue includes measuring scattering coefficients of the tissue at each of a plurality of temperatures and at a selected tissue depth using optical coherence tomography, and determining the glucose concentration in interstitial fluid of the tissue as a function of the measured scattering coefficients.
Fourier domain optical coherence tomography employing a swept multi-wavelength laser and a multi-channel receiver
PatFT, AppFT (Jun 24 2008)
Patents
BACKGROUND OF THE INVENTION1. Field of the InventionThe invention relates generally to optical coherence tomography (OCT) and in particular to Fourier domain optical coherence tomography.2. Description of Related ArtOptical Coherence Tomography (OCT) is a technology for performing high-resolution cross sectional imaging that can provide images of tissue structure on the micron scale in situ and in real time. In recent years, it has been demonstrated thatFourier domain OCT (FD-OCT), which ...
Wide bandwidth light source
PatFT, AppFT (Jun 17 2008)
Patents
PROBLEM TO BE SOLVED: to realize a wide bandwidth light source capable of a stable operation providing a less spectrum variation.SOLUTION: Optical pulses 202 outputted by this optical pulse-generating device 201 are split by optical coupler 210. The one of split optical pulses is inputted in white light-emitting device 204 to emit the white light having the wide bandwidth. The other split is inputted in optical band pass filter 212 ...
High efficiency balanced detection interferometer
PatFT, AppFT (Jun 17 2008)
Patents
BACKGROUND OF THE INVENTION1. Field of the InventionThe invention relates generally to optical imaging using optical coherence tomography and in particular to systems and methods for achieving balanced detection with high signal to noise ratio.2. Description of Related ArtOptical coherence domain reflectometry (OCDR) is a technique initially developed to provide a higher resolution over optical time domain reflectometry (OTDR) for the characterization of the position and the magnitude of reflect
Multiple Beam Source For A Multi-Beam Interferometer And Multi-Beam Interferometer (Wo 2008/068497)
wipo.int (Jun 12 2008)
Microscopy,
Patents
A multi-beam interferometer, typically for use in Optical Coherence Tomography, comprising a multiple beam source (1), the source being arranged so as to provide, in use, a plurality of beams (101-105) of light for use in the interferometer, the source comprising: a light source (2) arranged to, in use, emit a beam of light (9); and a rattle plate (3) comprising a first reflective surface (4) and a second reflective ...
Health care kiosk having automated diagnostic eye examination and a fulfillment remedy based thereon
PatFT, AppFT (Jun 10 2008)
Ophthalmology,
Patents
A stand-alone station such as a kiosk (10) includes automated equipment for performing eye examination procedures on a user positioned in the station (11). Information derived from the examination determines possible existence of a correctable medical condition. The station includes a user interface (22) and a fulfillment remedy section (30) that addresses the medical condition, as by fabrication of eyeglasses (32) for correction of refraction error, or by communicating treatments ...
Microscopy imaging apparatus and method for generating an image
PatFT, AppFT (Jun 10 2008)
Microscopy,
Patents
A method and a microscopy imaging apparatus for generating an optically sectioned image of a specimen are provided. The method comprises the steps of: illuminating the specimen with a modulating, spatially periodic illumination pattern; imaging said specimen on a conjugate image plane; acquiring a plurality of signals at respective positions on said image plane, each signal corresponding to the incident light intensity at that position and having an oscillatory component ...
Apparatus and method for combined optical-coherence-tomographic and confocal detection
PatFT, AppFT (Jun 3 2008)
Ophthalmology,
Patents
This invention provides a better apparatus and method for the generation of Optical Coherence Tomography (OCT) and Confocal Scanning Laser Ophthalmoscope (CSLO) images, using a dual-waveguiding module. A dual-waveguiding structure consists of a single-mode and a multi-mode waveguide each with optimum size and numerical aperture for highly efficient collection of the OCT and CSLO optical signals. Separation of the two signals is achieved by channeling most of the multi-mode guided ...
Tunable fiber laser light source
PatFT, AppFT (Jun 3 2008)
Patents
An optical fiber loop has a gain medium having a gain at an oscillation wavelength and optical circulators 13 and 14. Collimate lenses 22 and 24 enlarge light bean taken from the optical circulators 13 and 14. A polygon mirror 25 is provided on the light axis, and is rotated. A diffraction grating 27 is provided at the receiving position of the light reflected by the polygon mirror 25, and ...
Fiber-optic rotational device, optical system and method for imaging a sample
A device, system and method for transmitting electro-magnetic radiation between at least two separate fibers (as well as for imaging a sample) are provided. For example, a first optical fiber and a second optical fiber may be provided, such that the first and/or second fibers is/are rotatable. At least one first optical arrangement may also be included which communicates with at least one end of the first optical fiber and/or ...
A device, system and method for transmitting electro-magnetic radiation between at least two separate fibers (as well as for imaging a sample) are provided. For example, a first optical fiber and a second optical fiber may be provided, such that the first and/or second fibers is/are rotatable. At least one first optical arrangement may also be included which communicates with at least one end of the first optical fiber and/or ...
Fiber stretcher apparatus
PatFT, AppFT (Jun 3 2008)
Patents
Designs of fiber stretcher apparatus using one or more linear actuators to stretch fiber loops for various applications including variable optical delay lines and devices using such delay lines.
Integrated Biomedical Multimodality Imaging Probe - Optical Coherence Tomography/Ultrasound/Photoacoustics Imaging System
ota.uci.edu (May 31 2008)
Cardiology,
Patents
In clinical applications for the examination of cardiovascular, cerebrovascular, leg and other vessels, ultrasound imaging (USI) and optical coherence tomography (OCT) are two of the most widely used imaging modalities. USI and OCT both measure cross-sectional tissue profile. OCT measures tissue surface profile and cross-sectional image within a few millimeter depth range under the skin with a superior image resolution of 10 micrometers; high frequency USI also measures cross-sectional tissue ...
Apparatus For Dental Oct Imaging (Wo 2008/063605)
An apparatus (10) for obtaining an image of a tooth (20) includes an image sensor and a white light source (12) providing broadband polychromatic light and an ultraviolet light source providing narrow-band light. A combiner (15) directs broadband polychromatic light and narrow band light along a common illumination path to illuminate the tooth. A polarization beamsplitter (18) directs polarized light from the illumination path along an optical axis (216). An ...
An apparatus (10) for obtaining an image of a tooth (20) includes an image sensor and a white light source (12) providing broadband polychromatic light and an ultraviolet light source providing narrow-band light. A combiner (15) directs broadband polychromatic light and narrow band light along a common illumination path to illuminate the tooth. A polarization beamsplitter (18) directs polarized light from the illumination path along an optical axis (216). An ...
OCT IP landscape more complicated than it looks
BioOptics World (May 21 2008)
Patents
In February 2008, the publishers of BioOptics World and Laser Focus World magazines published the first market research report to quantify the rapidly growing market for optical coherence tomography (OCT) technologies and applications (see www.laserfocusworld.com/articles/318570). Among other things, the report accurately describes the rather complex patent situation in the OCT market:
Optical Tomography System
PatFT, AppFT (May 20 2008)
Patents
In an optical tomography system for obtaining a tomographic image of an object to be measured by detecting interference light of the reflected light and the reference light, a controller switches between a first detecting mode in which the interference light is detected at a first wavelength resolution and a second detecting mode in which the interference light is detected at a second wavelength resolution higher than the first wavelength ...
Relaxed confocal catadioptric scanning laser ophthalmoscope
PatFT, AppFT (May 20 2008)
Ophthalmology,
Patents
A number of additional embodiments and optical constructions of a relaxed confocal catadioptric scanning laser opthalmoscope (SLO) are disclosed. They improve the functionality of microperimetry (MP), and the integration of the existing instrument with the capabilities of high speed spectral domain optical coherence tomography (SD-OCT). The improvements pertain to enhanced acousto-optic modulation with regard to rise-time and combination of wavelengths, enhanced control of illuminating beam characteristics and separation of illuminating ...
Systems and Methods for Dynamic Optical Imaging
A medical system includes a catheter having an elongated tubular member and an inner core slideably received within the elongated member. The inner core includes an imager on a distal end and is coupled with a control system and an imaging system. The inner core is configured to scan the interior of a lumen by radially rotating around a center axis and axially translating along the center axis while within ...
A medical system includes a catheter having an elongated tubular member and an inner core slideably received within the elongated member. The inner core includes an imager on a distal end and is coupled with a control system and an imaging system. The inner core is configured to scan the interior of a lumen by radially rotating around a center axis and axially translating along the center axis while within ...
Optical Coherence Imaging Systems Having A Mechanism For Shifting Focus And Scanning Modality And Related Adapters (Wo 2008/057391)
wipo.int (May 15 2008)
Ophthalmology,
Patents
Some embodiments of the present invention provide adapters for use in posterior imaging systems. The adapters include lens set configured to adapt the posterior imaging system to operate as an anterior imaging system. Related optical coherence tomography systems and anterior imaging systems are also provided herein.
Optical tomographic apparatus
PatFT, AppFT (May 13 2008)
Patents
An optical tomographic apparatus is provided and includes a light source portion, an interferometer, and a signal processing portion. The light source portion including two low coherent light sources capable of simultaneously emitting light having wavelength bands different from each other. The emitted light is divided in two of a light flux irradiated to a subject by a probe and a light flux irradiated to reference mirrors that is divided ...
Opthalmologic apparatus
PatFT, AppFT (May 13 2008)
Ophthalmology,
Patents
The ophthalmologic apparatus 1 splits low coherence light LO into a signal light LS and a reference light LR, the interference light LC being generated by having the signal light LS overlap with the reference light LR, and detects this interference light LC. In addition, the apparatus comprises an optical alignment system 190A for performing the alignment of an optical system forming the signal light path to the eye E. ...
Optical Imaging Apparatus With Spectral Detector (Wo 2008/052311)
wipo.int (May 8 2008)
Ophthalmology,
Patents
Apparatus for obtaining depth profile information from a transparent object, includes a confocal scanner for producing an en-face image of the object in an x-y plane, a spectral optical coherence tomography (OCT) apparatus for producing an OCT scan along at least one line in the z direction passing through a point in the x-y plane, and a display device. A processing unit displays on the display device the en-face image ...
Dynamic compensation system for maskless lithography
PatFT, AppFT (May 6 2008)
Patents
A method for dynamically registering multiple patterned layers on a substrate (3) comprises: depositing a first layer on the substrate; printing a first pattern (20) on the first layer; depositing a second layer on the first pattern; and printing a second pattern on the second layer while dynamically detecting the first pattern to align the second pattern with the first pattern.