1. Articles from uspto.gov

    patft.uspto.gov

  2. 1-24 of 1880 1 2 3 4 ... 77 78 79 »
    1. Forward scanning-optical probes, circular scan patterns, offset fibers

      Forward scanning-optical probes, circular scan patterns, offset fibers

      An optical light scanning probe is presented, the probe comprising a handle, shaped for grasping by a user; a cannula, protruding from a distal portion of the handle with an outer diameter smaller than 20 gauge; an optical fiber with a distal fiber-portion off a probe-axis, configured to receive a light from a light-source at a proximal fiber-portion, and to emit the received light at the distal fiber-portion; a fixed beam forming unit, disposed at a distal portion of the cannula, configured to receive the light from the distal fiber-portion, and to deflect the received light toward a target region ...

      Read Full Article
    2. Multi-channel optical coherence tomography probe for use in a medical procedure

      Multi-channel optical coherence tomography probe for use in a medical procedure

      A multi-channel optical coherence tomography probe for use in a medical procedure is provided. The probe comprises: a plurality of first optical fibers optically connectable to an OCT light source; a plurality of second optical fibers different from the plurality of first optical fibers; a scanning device comprising: an actuator configured to rotationally move the plurality of second optical fibers between a first position and a second position, relative to the plurality of first optical fibers; and, a mirror configured to, as the plurality of second optical fibers is moving rotationally, convey light from exit faces of the plurality of ...

      Read Full Article
    3. Dispersion encoded full range optical coherence tomograph

      Dispersion encoded full range optical coherence tomograph

      An apparatus for optical coherence tomography (OCT) comprises a light source, a first arm, a second arm, and a processing unit. The first arm has a first dispersive optical assembly that induces a first amount of dispersion into light from the light source and traversing the first arm, where the first arm is one of a sample arm and a reference arm of an interferometer. The second arm has a second dispersive optical assembly that induces a second amount of dispersion into light from the light source and traversing the second arm, where the second arm is the other of ...

      Read Full Article
      Mentions: Ole Massow
    4. Ophthalmic apparatus

      Ophthalmic apparatus

      An ophthalmic apparatus includes a deforming unit and a generation unit. The deforming unit deforms a shape of a boundary that defines a region of a tomographic image of a subject eye in a depth direction according to a thickness of a layer in which the boundary is positioned. The generation unit generates an en-face image based on the region in the depth direction defined by the shape of the boundary deformed by the deforming unit.

      Read Full Article
    5. Reference signal filter for interferometric system

      Reference signal filter for interferometric system

      The invention provides a method and apparatus for applying spatial filtering the optical beam of a free space optical coherence tomography (OCT) system substantially without problematic reflections back to the optical source. The invention teaches spatially filtering the reference beam of the OCT system which is typically designed to provide isolation of the optical source from undesirable optical feed-back, thereby achieving spatial filtering without generating undesirable reflections back to the optical source. Various embodiments are taught.

      Read Full Article
    6. Data processing method and OCT apparatus

      Data processing method and OCT apparatus

      According to one embodiment, a data processing method is used for processing collected data acquired with respect to each A-line by swept-source OCT using a wavelength sweeping light source having a predetermined wavelength sweeping range. The data processing method detects a reference signal assigned in advance to a clock, the wavenumber of which linearly varies along the time axis, in a predetermined wavelength position within the predetermined wavelength sweeping range. Then, the data processing method sequentially performs sampling of the collected data based on the clock with reference to the predetermined wavelength position where the reference signal detected is assigned ...

      Read Full Article
    7. Apparatus for modelling ocular structures

      Apparatus for modelling ocular structures

      An apparatus for motion compensated modelling of a parameter of an eye, comprising: a first measuring means for measuring a plurality of position parameters of the eye with respect to an optical reference coordinate system of the apparatus; a second measuring means for measuring an interference signal at a plurality of optical reference coordinates, wherein the measurement of the plurality of position parameters and measurement of the interference signal are time synchronized; means for correcting the interference signal to account for a displacements of a parameter of the plurality of position parameters; and means for modelling the eye parameter based ...

      Read Full Article
    8. Nano-sensitive fourier-domain optical coherence tomography inspection system

      Nano-sensitive fourier-domain optical coherence tomography inspection system

      An OCT imaging system (100) comprising a radiation emitter (SLD), a radiation receiver CCD), an interferometer (FC, PC, X-Scan, Y-Scan), a controller (COMP) which controls the emitter and processes received radiation data according to OCT to provide an output image. The controller (COMP) forms a spectrum of spatial frequencies along the depth direction. It calculates from the spectrum local spectra of spatial frequencies or periods along the depth direction for individual volume elements along the depth direction. It translates the local spectra of spatial frequencies or periods along the depth direction into the OCT image domain. It maps the local ...

      Read Full Article
    9. Systems, methods, and devices for optical coherence tomography multiple enface angiography averaging

      Systems, methods, and devices for optical coherence tomography multiple enface angiography averaging

      Abstract The disclosure herein provides methods, systems, and devices for improving optical coherence tomography machine outputs through multiple enface optical coherence tomography angiography averaging techniques. The embodiments disclosed herein can be utilized in ophthalmology for employing optical coherence tomography (OCT) for in vivo visualization of blood vessels and the flow of blood in an eye of a patient, which is also known generally as optical coherence tomography angiography (OCTA). The embodiments disclosed herein can use linear registration, affine registration and/or elastic registration to align a plurality of optical coherence tomography angiography images or videos at corresponding superficial vascular layers ...

      Read Full Article
    10. OCT data processing method, storage medium storing program for executing the OCT data processing method, and processing device

      OCT data processing method, storage medium storing program for executing the OCT data processing method, and processing device

      To acquire information relating to a vessel wall thickness by: acquiring interference signal sets of a plurality of frames including interference signal sets corresponding to a plurality of frames forming an image of the same cross section of an fundus; generating 3-D tomographic image data on the fundus from the interference signal sets of the plurality of frames; generating 3-D motion contrast data in the fundus from the interference signal sets corresponding to the plurality of frames that form the same cross section; extracting a vessel from the fundus based on the 3-D tomographic image data or the 3-D motion ...

      Read Full Article
    11. Intensity noise reduction methods and apparatus for interferometric sensing and imaging systems

      Intensity noise reduction methods and apparatus for interferometric sensing and imaging systems

      In part, aspects of the invention relate to methods, apparatus, and systems for intensity and/or pattern line noise reduction in a data collection system such as an optical coherence tomography system that uses an electromagnetic radiation source and interferometric principles. In one embodiment, the noise is intensity noise or line pattern noise and the source is a laser such as a swept laser. One or more attenuators responsive to one or more control signals can be used in conjunction with an analog or digital feedback network in one embodiment.

      Read Full Article
    12. Method and apparatus for measuring biofilm thickness and topology

      Method and apparatus for measuring biofilm thickness and topology

      An apparatus and method of measuring biofilm and biological activity on a surface is disclosed. The apparatus includes a biofilm, which includes one or more microorganisms, grown on a substrate. A viewing window is placed on a surface of the biofilm and a gas bubble is introduced between the viewing window and the surface of the biofilm. The space between the substrate and the viewing window may be enclosed in a casing that has an inlet and an outlet, forming a flow cell. A microscope system, such as a white light interferometer, captures data of the biofilm in situ and ...

      Read Full Article
    13. Method and system for improving aiming during optical coherence tomography on young children by synchronization with retinal bifringence scanning

      Method and system for improving aiming during optical coherence tomography on young children by synchronization with retinal bifringence scanning

      The present invention is directed to a method and system for improved aiming during Optical Coherence Tomography (OCT) on young children and those unable to cooperate with OCT imaging by synchronization with retinal birefringence scanning (RBS). OCT is performed without knowing whether or not the subject is looking at the intended target. The present invention combines OCT retinal imaging, such as, but not limited to, time domain OCT, SDOCT, or SSOCT, with RBS technology that provides accurate information on the presence or absence of foveal fixation. Therefore, the present invention only analyzes data during foveal fixation. A system combining OCT ...

      Read Full Article
    14. Ocular surface interferometry (OSI) devices and systems for imaging, processing, and/or displaying an ocular tear film

      Ocular surface interferometry (OSI) devices and systems for imaging, processing, and/or displaying an ocular tear film

      Ocular surface interferometry devices, systems, and methods are disclosed for imaging an ocular tear film. An imaging device can be focused on the lipid layer of the tear film to capture optical wave interference interactions of specularly reflected light from the tear film combined with a background signal(s) in a first image, wherein the specularly reflected light may be produced from various portions of the ocular tear film by obliquely illuminating various portions of the ocular tear film with a multi-wavelength light source, such as in a tiling pattern(s). The imaging device can also be focused on the ...

      Read Full Article
    15. Optical coherence tomography using polarization information

      Optical coherence tomography using polarization information

      The optical coherence tomography includes a processor, wherein the processor is configured to: vectorize the Jones matrix and then convert the vectorized Jones matrix into an expanded matrix; calculate at least an eigenvalue and at least an eigenvector of the expanded matrix by performing an eigenvalue decomposition to the expanded matrix; and estimate the polarization characteristic of the subject by using at least an eigenvalue and at least an eigenvector of the Jones matrix acquired based on the at least eigenvalue and the at least eigenvector of the expanded matrix.

      Read Full Article
    16. Optical coherence tomography system and method with multiple apertures

      Optical coherence tomography system and method with multiple apertures

      An optical coherence tomography (OCT) system using partial mirrors is generally described. In an example, the OCT system includes a swept light source. The system further includes an interferometer into which light from the light source is directed and a detector configured to produce an imaging sample signal based on light received from the interferometer. The system also includes a partial mirror disposed over an aperture, wherein the partial mirror is configured to transmit light within a first wavelength range and reflect light within a second wavelength range.

      Read Full Article
    17. Surface emitting laser, laser array, light source device, information acquisition device, and optical coherence tomography apparatus

      Surface emitting laser, laser array, light source device, information acquisition device, and optical coherence tomography apparatus

      Provided is a surface emitting laser that is to be excited by an external light source and in which a light-emitting position is defined. A surface emitting laser includes a pair of reflecting mirrors (11, 15) and an active layer (13) that is arranged between the pair of reflecting mirrors (11, 15) and that is to be excited by light that is radiated from an external light source. A gap is formed between the active layer and one of the pair of reflecting mirrors (15), the oscillation wavelength of the surface emitting laser is changed, and a defining structure (20 ...

      Read Full Article
    18. Microscopy system with auto-focus adjustment by low-coherence interferometry

      Microscopy system with auto-focus adjustment by low-coherence interferometry

      Disclosed are several technical approaches of using low coherence interferometry techniques to create an autofocus apparatus for optical microscopy. These approaches allow automatic focusing on thin structures that are positioned closely to reflective surfaces and behind refractive material like a cover slip, and automated adjustment of focus position into the sample region without disturbance from reflection off adjacent surfaces. The measurement offset induced by refraction of material that covers the sample is compensated for. Proposed are techniques of an instrument that allows the automatic interchange of imaging objectives in a low coherence interferometry autofocus system, which is of major interest ...

      Read Full Article
    19. Systems and methods of choroidal neovascularization detection using optical coherence tomography angiography

      Systems and methods of choroidal neovascularization detection using optical coherence tomography angiography

      Disclosed are systems and methods to automatically detect choroidal neovascularization (CNV) in the outer retina using OCT angiography. Further disclosed are methods of removing projection artifacts from the outer retina and for combining brightness, orientation, and position information in a context-aware saliency model to quantify CNV area in OCT angiograms.

      Read Full Article
    20. OCT angiography calculation with optimized signal processing

      OCT angiography calculation with optimized signal processing

      Methods and systems for angiographic imaging with optical coherence tomography (OCT) are described using ratio-based and angiographic deviation based calculations. In using these calculations to determine motion, arbitrary interframe permutations may be used, post-calculated, non-linear results for projection visualization may be averaged, poor matches may be eliminated on an A-line by A-line basis, windowing functions may be used to improve results, partial spectrums may be used when capturing data, and a minimum intensity threshold may be used for determining which pixels to use.

      Read Full Article
    21. Depth-resolved spatial-domain low-coherence quantitative phase microscopy for unstained tissue and cells

      Depth-resolved spatial-domain low-coherence quantitative phase microscopy for unstained tissue and cells

      Provided are systems, methods, and other embodiments associated with depth-resolved spatial-domain low-coherence quantitative phase microscopy for high-throughput analysis of 3D nanoscale architectural alterations in unstained tissue and cells. A spatial-domain low-coherence quantitative phase microscopy apparatus includes a drOPD mapping module, a transmission phase imaging module, and a bright-field and transmission phase imaging module. The drOPD mapping module includes a reflection-mode low-coherence spectral interferometry for drOPD mapping of unstained tissue. The transmission phase imaging module includes transmission quantitative phase imaging of unstained and stained tissue and produce an image registration reference. The bright-field and transmission phase imaging module includes bright-field imaging ...

      Read Full Article
    22. Optical buffer-based apparatus for increasing light source repetition rate

      Optical buffer-based apparatus for increasing light source repetition rate

      In one embodiment, the invention relates to an apparatus for increasing the repetition rate in a light source. The apparatus includes a first optical coupler comprising a first arm, a second arm and a third arm; a first mirror in optical communication with the second arm of the first optical coupler; and a first optical delay line having a first end in optical communication with the third arm of the first optical coupler and a second end in optical communication with a second mirror, wherein light entering the first arm of the first optical coupler leaves the first arm of ...

      Read Full Article
    23. Optical measuring method and measuring device having a measuring head for capturing a surface topography by calibrating the orientation of the measuring head

      Optical measuring method and measuring device having a measuring head for capturing a surface topography by calibrating the orientation of the measuring head

      The invention relates to an optical measuring process for acquiring a surface topography of a measurement object. To this end, a measuring device with a measuring head in a measuring head guide device is provided for chromatic confocal acquisition of the surface topography or for spectral interferometric OCT acquisition of the distance to the surface topography. Firstly, spectrally broadband light of a light source from a fibre array with i fibres of i measurement spots is directed onto the measurement object via a common measuring head optic, with formation of a spot array of i measurement spots. i reflection spectra ...

      Read Full Article
    1-24 of 1880 1 2 3 4 ... 77 78 79 »
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks