1. Articles in category: Patents

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    1. Optical interference tomographic image generating apparatus and method for using same

      Optical interference tomographic image generating apparatus and method for using same

      Provided are an optical interference tomographic image generating apparatus and a method for using the same, whereby an image can be acquired in which the effect of unnecessary matter near a sample is reduced. An optical interference tomographic image generating apparatus is provided with an OCT control device for performing image processing for vertically inverting an image generated from a detection signal in the case of a setting whereby a reference mirror is disposed so that the optical path length of a reference optical path matches the optical path length of a sample optical path having as a reference position ...

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    2. Methods and apparatus for phase stabilized swept-source optical coherence tomography (SS-OCT) including rescaling and dynamic range enhancement

      Methods and apparatus for phase stabilized swept-source optical coherence tomography (SS-OCT) including rescaling and dynamic range enhancement

      An optical coherence tomography (OCT) system electrically mixes a signature signal with an OCT signal (e.g., an interferogram) output by a photodetector of the OCT system. The signature signal may be a signal output by a photodetector that detects an optical signal from a fiber Bragg grating. The signature signal may then be time delayed before combination with the OCT signal. A series of interferograms are then aligned according to the signature signal. A rescaling signal may be similarly electrically mixed with the signature and OCT signals.

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    3. Frequency-domain optical interferometry imaging apparatus and method for astigmatistic bi-focal illumination imaging of an eye

      Frequency-domain optical interferometry imaging apparatus and method for astigmatistic bi-focal illumination imaging of an eye

      Embodiments of the present invention provide a method and apparatus for frequency-domain optical interferometry imaging. Embodiments of the invention include an apparatus comprising a line-shaping optical element for directing optical radiation into a line illumination, an imaging optical element for receiving optical radiation comprising radiation reflected from a target sample and a reference point associated with the target sample, and a detection unit for measuring common path interferences between a plurality of reflections from the target sample and the reference point. Embodiments of the invention include a method comprising directing radiation into a line illumination, directing the line illumination towards ...

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    4. Non-invasive blood sugar measurement method and device using optical reflectometry

      Non-invasive blood sugar measurement method and device using optical reflectometry

      A non-invasive blood sugar measurement device using optical reflectometry is provided. According to an embodiment of the present invention, provided are a specific configuration and method, the configuration comprising: a light generation means for generating light to be emitted at the skin to be measured when OTDR and OFDR are used; an optical measurement means for measuring the intensity of light; an optical system for emitting the generated light at the skin to be measured and transmitting reflected light to the optical measurement means; an analysis means for analyzing collected reflected light on the basis of a change in the ...

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    5. Optical delay line for coherence imaging

      Optical delay line for coherence imaging

      An optical coherence tomography (OCT) system comprises an interferometer configured to generate interference light based on interference between a reference beam and a sample beam with which a sample has been irradiated. A detector operates to detect intensities of the interference light and/or one or more interference patterns; a processor is configured measure a signal falloff of the intensity of the interference light and/or the one or more interference patterns; and an optical delay line configured to adjust an optical path difference according to the signal falloff so as not substantially introduce artifacts to an image of the ...

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    6. Ophthalmological imaging device

      Ophthalmological imaging device

      An ophthalmological imaging device comprising an objective lens, an interference optical system, an image forming unit, an optical member, and an analyzer. The interference optical system divides light from a light source into measurement light and reference light, causes the measurement light to become incident on a subject's eye via the objective lens, and detects interference light between the reference light and return light of the measurement light that has exited from the subject's eye and passed through the objective lens. The image forming unit forms an image of the subject's eye based on a detection result ...

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    7. Fast parallel optical coherence tomographic image generating apparatus and method

      Fast parallel optical coherence tomographic image generating apparatus and method

      Provided is a fast parallel optical coherence tomographic image generating method including dispersing light into N spectral regions .DELTA..lamda..sub.1 through .DELTA..lamda..sub.N sequentially from a low frequency wavelength to a high frequency wavelength, the light being emitted from a broadband light source of a fast parallel optical coherence tomographic image generating apparatus, N being an integer greater than or equal to 2, splitting the light emitted from the broadband light source to be incident on a sample and a reference mirror, partitioning the sample into N image regions P.sub.1 through P.sub.N ...

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    8. Dual-edge sampling with k-clock to avoid aliasing in optical coherence tomography

      Dual-edge sampling with k-clock to avoid aliasing in optical coherence tomography

      Techniques and apparatus for producing sampled Optical Coherence Tomography (OCT) interference signals without aliasing, based on a swept-source OCT interference signal. An example apparatus comprises a k-clock circuit configured to selectively output a k-clock signal at any of a plurality of k-clock frequencies ranging from a minimum k-clock frequency to a maximum k-clock frequency, and an anti-aliasing filter configured to filter a swept-source OCT interference signal, to produce a filtered OCT interference signal, where the anti-aliasing filter has a cut-off frequency greater than one-half the minimum k-clock frequency but less than the minimum k-clock frequency. The apparatus further comprises an ...

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    9. Apparatus and method for processing the signal in master slave interferometry and apparatus and method for master slave optical coherence tomography with any number of sampled depths

      Apparatus and method for processing the signal in master slave interferometry and apparatus and method for master slave optical coherence tomography with any number of sampled depths

      The present invention related to an apparatus and method for master slave interferometry, referred to as Complex Master Slave (CMS). The method and apparatus can be used to provide complex-valued measurements of a signal reflected from an axial position inside an object or of signals reflected from points at several axial positions inside an object.

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    10. Common-path integrated low coherence interferometry system and method therefor

      Common-path integrated low coherence interferometry system and method therefor

      A low coherence interferometry imaging system comprising a common-path interferometer that is at least partially integrated as part of a planar lightwave circuit is disclosed. Imaging systems in accordance with the present invention are implemented in integrated optics without the inclusion of highly wavelength-sensitive components. As a result, they exhibit less wavelength dependence than PLC-based interferometers of the prior art. Further, the common-path interferometer arrangement of the present invention avoids polarization and wavelength dispersion effects that plague prior-art PLC-based interferometers. Still further, an integrated common-path interferometer is smaller and less complex than other integrated interferometers, which makes it possible to ...

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    11. Image processing apparatus, image processing method, computer-readable storage medium, and system using optical coherence tomography

      Provided is an image processing apparatus including: a data acquiring unit configured to acquire a plurality of pieces of tomographic data, which are obtained by performing optical coherence tomographic imaging of an object to be inspected through use of measuring light a plurality of times; a noise acquiring unit configured to acquire a noise characteristic of the tomographic data; a coefficient determining unit configured to determine a weighting coefficient corresponding to each pixel position in a tomographic image generated from the tomographic data based on the plurality of pieces of tomographic data and the noise characteristic; a changing unit configured ...

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    12. Optical coherence tomography method, system and computer program product therefor

      Optical coherence tomography method, system and computer program product therefor

      The present invention relates to an optical coherence tomography method, comprising: providing a beam of imaging radiation from a radiation source of an optical coherence tomography apparatus; directing, using directing optics, the beam of imaging radiation towards a fundus of a human or animal eye; and receiving a reflected portion of the imaging radiation by the optical coherence tomography apparatus; wherein the method further comprises: providing, by a tracking camera, a tracking image of an image area covering at least a part of said fundus; analyzing the tracking image for detecting a displacement of the fundus; and adapting, at least ...

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    13. Ophthalmological device and ophthalmological inspection system

      Ophthalmological device and ophthalmological inspection system

      An ophthalmological device according to the embodiments comprises an objective lens, an objective measurement optical system, an interference optical system, and an image forming unit. The objective measurement optical system irradiates light onto a subject's eye via the objective lens and detects returning light from the subject's eye. The interference optical system splits light from a light source into reference light and measurement light, projects the measurement light onto the subject's eye via the objective lens so as to overlap at least part of an area of the irradiated light at the subject's eye by the ...

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    14. Full-field interferential imaging systems and methods

      Full-field interferential imaging systems and methods

      A system for the full-field interferential imaging of a sample, includes an illumination path with a light source, an interferometer with at least one first objective, and a separating element for receiving incident light waves via an input face and for forming an object arm for receiving the sample and a reference arm on which a reflection device is arranged, the reflection device being used to reflect incident light waves in a direction different from the direction of incidence. The separator element has a reflection coefficient and a transmission coefficient that are non-equal such that the proportion of the optical ...

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    15. Methods for robotic assisted cataract surgery

      Methods for robotic assisted cataract surgery

      Systems and processes for facilitating the removal of cataract material with a robotically assisted tool with laser, irrigation capabilities, aspiration capabilities. Tool guidance systems that make use of vision technologies, including optical coherence tomography (OCT), white light imaging, and structured light imaging. Emulsification patterns optimized to minimize risk to the patient and reduce procedure time. Robotic tools with articulation capabilities that allow for precise control during capsulorhexis and emulsification procedures. Robotic instrument drive mechanisms combined with pumps, flow meters, and valves regulate and control irrigation and aspiration functionalities during robotic ophthalmologic procedures.

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    16. Optical image measurement apparatus and optical image measurement method

      Optical image measurement apparatus and optical image measurement method

      Exemplary embodiments relate to providing an optical image measurement apparatus that is capable of acquiring information on birefringence of a sample while suppressing size and cost of the apparatus. In the present disclosure: second measurement light different from first measurement light is generated using a passive optical element that generates light of second polarization state different from first polarization state; a time when the first measurement light is irradiated onto a sample is adjusted at a first time, and a time when the second measurement light is irradiated onto the sample is adjusted at a second time different from the ...

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    17. System and method for detecting optical probe connection

      System and method for detecting optical probe connection

      A catheter system includes an electronic console; a catheter having a proximal end attachable to the console and a distal end configured to house therein an optical probe; an optical fiber configured to transmit from the console to the optical probe excitation radiation of a first wavelength, and configured to return to the console an optical response signal having a second wavelength longer than the first wavelength; a detector configured to detect intensity of the optical response signal; and a processor configured to determine, based on the detected intensity of the optical response signal, whether the catheter is properly connected ...

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    18. Multiple depth optical coherence tomography system and method and laser eye surgery system incorporating the same

      Multiple depth optical coherence tomography system and method and laser eye surgery system incorporating the same

      An OCT system for imaging multiple depth positions includes a light source, a sample arm and two or more reference arms. The sample arm propagates light to the object and directs object return light having a first return light beam from a first position and a second return light beam from a second position, the second return light having a dispersion level higher than the first return light beam by a dispersion difference amount. The first and second reference arms produce light beams having substantially the same dispersion as the first and second return light beams, respectively. The optical pathway ...

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    19. System and method for facilitating manual and/or automatic volumetric imaging with real-time tension or force feedback using a tethered imaging device

      System and method for facilitating manual and/or automatic volumetric imaging with real-time tension or force feedback using a tethered imaging device

      According to exemplary embodiments of the present disclosure, apparatus, device and method can be provided which can provide imaging of biological tissues, e.g., luminal organs in vivo, using optical techniques in an automatic or semiautomatic manner. The exemplary apparatus, device and method can utilize a tethered capsule catheter with a mechanism for manual, semi-automatic or automatic traversing in the luminal organ with a controlled velocity and/or image quality. The exemplary apparatus can include feedback information about tension applied to the catheter during its movement that can be used to adjust velocity and assure patient comfort and safety for ...

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    20. Imaging devices, systems, and methods of operation for acoustic-enhanced optical coherence tomography

      Imaging devices, systems, and methods of operation for acoustic-enhanced optical coherence tomography

      The present invention provides imaging devices, systems, and methods of operation for acoustic-enhanced optical coherence tomography. The systems coordinate imaging devices, optical coherence tomography (OCT), and pulsed ultrasound (FUS) and or pulsed ultrasound (PUS) to enhance the contrast of images. Moreover, the systems improve in vivo diagnosis and drug release through the utilization of sonographic enhancers such as microbubbles (MBs).

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    21. Integrated photonic array fed by free-space optics

      Integrated photonic array fed by free-space optics

      An optical system for producing an optical probe beam includes an optical source that generates a free-space optical beam. An optical element is positioned in a path of the free-space optical beam to project the free-space optical beam to generate a projected free-space optical beam. A photonic integrated phased-array component positioned in a path of the projected free-space optical beam to reflect the projected free space optical beam, thereby generating the optical probe beam. The photonic integrated phased-array component comprises a plurality of antenna elements and a substrate positioned proximate to the plurality of antenna elements, wherein the substrate includes ...

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      Mentions: Eric A. Swanson
    22. Systems and methods for fiber-based visible and near infrared optical coherence tomography

      Systems and methods for fiber-based visible and near infrared optical coherence tomography

      A system for analyzing a tissue sample includes two wavelength-division multiplexers and a fiber coupler. The first wavelength-division multiplexer combines visible and near infrared electromagnetic radiation and directs the combined electromagnetic radiation to the fiber coupler. The fiber coupler emits a sample beam of visible and near infrared electromagnetic radiation toward a tissue sample, and a reference beam of visible and near infrared electromagnetic radiation toward a reference mirror. The sample beam reflects off the tissue sample back to the fiber coupler. The reference beam reflects off the reference mirror back to the fiber coupler. The fiber coupler combines the ...

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      Mentions: Ji Yi
    1-24 of 2631 1 2 3 4 ... 108 109 110 »
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