1. Articles in category: Patents

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    1. Apparatus and Method for Capturing a Vital Vascular Fingerprint

      Apparatus and Method for Capturing a Vital Vascular Fingerprint

      A method using optical coherence tomography to capture the microvascular network of the superficial layer of the finger skin for the purpose of fingerprint authentication and liveness detection. At the dermal papilla region, the vascular pattern follows the same pattern of the fingerprint and this vascular pattern forms a live vascular fingerprint. This live vascular fingerprint provides for ultrahigh security and a unique way for fingerprint-based personal verification. Because the system is based on blood flow, which only exists in a living person, the technique is robust against spoof attaching. After performing non-contact in-vivo imaging of a human fingertip, a ...

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    2. Methods and computer program products for quantitative three-dimensional image correction and clinical parameter computation in optical coherence tomography

      Methods and computer program products for quantitative three-dimensional image correction and clinical parameter computation in optical coherence tomography

      Methods and computer program products for quantitative three-dimensional (“3D”) image correction in optical coherence tomography. Using the methods and computer program products, index interface (refracting) surfaces from the raw optical coherence tomography (“OCT”) dataset from an OCT system can be segmented. Normal vectors or partial derivatives of the curvature at a refracting surface can be calculated to obtain a refracted image voxel. A new position of each desired refracted image voxel can be iteratively computed. New refracted corrected voxel positions to an even sampling grid can be interpolated to provide corrected image data. In some embodiments, clinical outputs from the ...

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    3. Method Of Motion Correction In Optical Coherence Tomography Imaging

      Method Of Motion Correction In Optical Coherence Tomography Imaging

      An image data set acquired by an optical coherence tomography (OCT) system is corrected for effects due to motion of the sample. A first set of A-scans is acquired within a time short enough to avoid any significant motion of the sample. A second more extensive set of A-scans is acquired over an overlapping region on the sample. Significant sample motion may occur during acquisition of the second set. A-scans from the first set are matched with A-scans from the second set, based on similarity between the longitudinal optical scattering profiles they contain. Such matched pairs of A-scans are likely ...

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    4. Broadband Or MID-INFRARED Fiber Light Sources

      Broadband Or MID-INFRARED Fiber Light Sources

      An optical system for use in an imaging procedure includes one or more semiconductor diodes configured to generate an input signal beam with a wavelength shorter than 2.5 microns that is amplified and communicated through optical fiber(s) to a nonlinear element configured to broaden the spectral width to at least 50 nm through a nonlinear effect. A subsystem includes lenses or mirrors to deliver an output beam having a broadened spectrum to an Optical Coherence Tomography apparatus with a sample and reference arm to perform imaging for characterizing the sample. The delivered output beam has a temporal duration ...

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    5. Segmentation and identification of layered structures in images

      Segmentation and identification of layered structures in images

      Disclosed herein are systems and method for segmentation and identification of structured features in images. According to an aspect, a method may include representing an image as a graph of nodes connected together by edges. For example, the image may be an ocular image showing layered structures or other features of the retina. The method may also include adding, to the graph, nodes adjacent to nodes along first and second sides of the graph. The added nodes may have edge weights less than the nodes along the first and second sides of the graph. Further, the method may include assigning ...

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    6. Device and method for measuring an optical break-through in a tissue

      Device and method for measuring an optical break-through in a tissue

      ] The invention relates to a device for measuring an optical penetration that is triggered in a tissue underneath the tissue surface by means of therapeutic laser radiation which a laser-surgical device concentrates in a treatment focus located in said tissue. The inventive device is provided with a detection beam path comprising a lens system which couples radiation emanating from the tissue underneath the tissue surface into the detection beam path. A detector device generating a detection signal which indicates the spatial dimension and/or position of the optical penetration in the issue is arranged downstream of the detection beam path.

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    7. System and method with refractive corrections for controlled placement of a laser beam's focal point

      System and method with refractive corrections for controlled placement of a laser beam's focal point

      A methodology is provided for correcting the placement of a laser beam's focal point. Specifically, this correction is done to compensate for displacements of the focal point that may be caused when implant material (e.g. an Intraocular Lens (IOL)) is positioned on the optical path of the laser beam. The methodology of the present invention then determines a deviation of the laser beam's refracted target position (uncompensated) from its intended target position. A calculation of the deviation includes considerations of the laser beam's wavelength and refractive/diffractive characteristics introduced by the implant material. This deviation is ...

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    8. Surgical microscope system and method

      Surgical microscope system and method

      A microscopy system and method allow observing a fluorescent substance accumulated in a tissue. The tissue can be observed at a same time both with visible light and with fluorescent light. It is possible to observe a series of previously recorded fluorescent light images in superposition with the visible light images. An end of the series of images may be automatically determined. A thermal protective filter may be inserted into a beam path of an illuminating system at such automatically determined end of the series. Further, the fluorescent light image may be analyzed for identifying a coherent fluorescent portion thereof ...

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    9. Gated optical coherence tomography (OCT)

      Gated optical coherence tomography (OCT)

      Systems, methods, and other embodiments associated with gated optical coherence tomography (OCT) are described. One example method includes generating an image control signal to control an OCT apparatus to acquire an image of an embryonic heart at a specified point in time during a cardiac cycle of the embryonic heart. The method may also include controlling the OCT apparatus to acquire the image based on the image control signal. In different examples, the image may be acquired in vivo or from an excised heart that is paced. The OCT apparatus and the embryonic heart may be housed in an environmental ...

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    10. Image acquisition apparatus and control method therefor

      Image acquisition apparatus and control method therefor

      Provided is an image acquisition apparatus for acquiring a 3D retinal image with high resolution, which is capable of reducing a time period required for data transmission. In the image acquisition apparatus: a blink of a subject is detected; acquisition of image taking data is suspended thereafter until a line of sight becomes stable; and the data transmission to a computer is started at a timing at which a blink has been detected, thereby avoiding acquiring unnecessary data, allowing a capacity of a data buffer to be smaller, and making the data transmission efficient.

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    11. Optical coherence tomographic imaging apparatus, optical coherence tomographic imaging method, program for executing the optical coherence tomographic imaging method, and storage medium having the program stored thereon

      Optical coherence tomographic imaging apparatus, optical coherence tomographic imaging method, program for executing the optical coherence tomographic imaging method, and storage medium having the program stored thereon

      In order to perform accurate evaluation for enhanced depth imaging (EDI) in which a tomographic image of a retina has a low luminance value in large part, provided is an optical coherence tomographic imaging apparatus for acquiring an image of an object to be inspected by irradiating the object to be inspected with measuring light and causing return light from the object to be inspected to interfere with reference light, the optical coherence tomographic imaging apparatus including: a unit for setting an imaging parameter of the image; a unit for selecting an image quality evaluation index in accordance with the ...

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    12. Optical coherence tomography apparatus and method

      Optical coherence tomography apparatus and method

      Measuring light with a wide wavelength band is used to provide a tomographic image excellent in vertical resolution. An optical coherence tomography apparatus acquiring a tomographic image of an object to be inspected based on an interference light obtained by causing a return light from a measuring light emitted onto the object to be inspected to interfere with a reference light corresponding to the measuring light, includes: a first dispersion compensation unit having a first dispersion compensation characteristic in a wavelength band of the measuring light; a second dispersion compensation unit provided onto the first dispersion compensation unit and having ...

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    13. Imaging apparatus and imaging method, program, and recording medium

      Imaging apparatus and imaging method, program, and recording medium

      An imaging apparatus that captures an object that changes temporally includes: first acquisition means for acquiring an overview image of the object; determination means for determining a reference part in the overview image in which there is less temporal change than in other parts; setting means for setting, in a first overview image, a capturing position of the object where detailed capturing is to be performed; registering means for, in the case where a second overview image has been acquired for the same object as the object in the first overview image, registering the second overview image with the first ...

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    14. Systems, methods and computer-accessible medium which provide microscopic images of at least one anatomical structure at a particular resolution

      Systems, methods and computer-accessible medium which provide microscopic images of at least one anatomical structure at a particular resolution

      Exemplary embodiments of systems and methods can be provided which can generate data associated with at least one portion of a sample. For example, at least one first radiation can be forwarded to the portion through at least one optical arrangement. At least one second radiation can be received from the portion which is based on the first radiation. Based on an interaction between the optical arrangement and the first radiation and/or the second radiation, the optical arrangement can have a first transfer function. Further, it is possible to forward at least one third radiation to the portion through ...

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    15. Image acquisition apparatus, image acquisition system, and method of controlling the same

      Image acquisition apparatus, image acquisition system, and method of controlling the same

      An OCT apparatus that photographs with a plurality of measuring beams concurrently, has a mechanism for adjusting the optical path length of a reference beam for each measuring beam. Accordingly, when tomographic images photographed in this manner are displayed side by side, because the depth of photographing varies from one tomographic image to another, it is difficult for an operator to comprehend the positional relation between the photographed images. In displaying tomographic images acquired with a plurality of measuring beams, the display position of each tomographic image is adjusted based on the changed optical path length of a reference beam ...

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    16. System for the improved imaging of eye structures

      System for the improved imaging of eye structures

      A system for the improved imaging of eye structures based on optical coherence tomography. The system includes an interferometric measuring arrangement, which has an optical element arranged in the measurement arm or reference arm for influencing the polarization state of the light before the light is interferometrically superimposed, a scanning unit arranged in the measurement arm for implementing OCT scans, a detector for recording the produced interference pattern, and an evaluating and documenting unit. At least two different polarization states of the light are produced. The interference patterns produced in the interferometric measuring arrangement are recorded and forwarded to the ...

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    17. Ophthalmic tomographic imager with corneo-retinal image analysis

      Ophthalmic tomographic imager with corneo-retinal image analysis

      An optical image measuring device 1 splits low-coherence light L0 into signal light LS and reference light LR, and splits an optical path of the reference light LR into two optical paths having different optical path lengths to split the reference light LR into two reference lights LRa, LRb. Furthermore, the optical image measuring device 1 makes the reference lights LRa, LRb interfere with the signal light LS propagated through an eye E, generates an interference light LC reflecting a morphology in each of two depth positions (fundus oculi Ef and cornea Ec) of an eye E, and detects the ...

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    18. Methods to reduce variance in OCT analysis of the macula

      Methods to reduce variance in OCT analysis of the macula

      Methods for analyzing optical coherence tomography (OCT) images of the macula to reduce variance and improve disease diagnosis are presented. One embodiment of the invention is directed towards selecting analysis locations and data segmentation techniques to take advantage of structural homogeneities. Another embodiment is directed towards reducing the variance in a collection of normative data by transforming the individual members of the database to correspond to a Standard Macula. Variations in foveal size are corrected by radial transformation. Variations in layer thickness are corrected by axial shifting. Diagnosis is performed by comparing OCT images from a patient to the improved ...

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    19. Bioptigen Receives New US Patent for Intrasurgical OCT System

      Bioptigen Receives New US Patent for Intrasurgical OCT System

      Foundational patent for intrasurgical OCT marks the company's focus on emerging market for ophthalmic surgical imaging MORRISVILLE, NC August 5, 2014 Bioptigen Inc. announces today that it has received a new US Patent presenting innovative concepts integrating Optical Coherence Tomography (OCT) Systems to Surgical Microscopes. The patent, US 8,777,412 Surgical Microscopes Using Optical Coherence Tomography and Related Methods, by Buckland E.L., et. al. includes claims for independent OCT focus and zoom control for optimizing images from the cornea to the retina, and puts forward key elements of Bioptigen's approach for incorporating OCT into new and ...

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    20. Sensor catheter having reduced cross-talk wiring arrangements

      Sensor catheter having reduced cross-talk wiring arrangements

      Improved wiring arrangements for sensor catheters are provided to reduce wire-to-wire cross-talk wherein wires connecting the sensor of the sensor catheter to a processing unit are divided into a plurality of wire bundles contained within respective sheaths, with the wires in wire bundle twisted together reduce electromagnetic signal interference among the individual wires, or between wire bundles.

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    21. Image processing apparatus and method

      Image processing apparatus and method

      An image processing apparatus for supporting imaging diagnosis of an eye is provided. A layer boundary of a retina region is detected from a tomographic image. A position where the detected layer boundary intersects with an upper or lower limit position of the image in the depth direction of the tomographic image is determined as a dividing position. The tomographic image is divided at the determined dividing position by a scan line in the depth direction of the tomographic image. Subsequently, whether the detection is a false detection is judged for each divided region. An average density value of the ...

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    22. Compact, affordable optical test, measurement or imaging device

      Compact, affordable optical test, measurement or imaging device

      The system disclosed is for optical coherence tomography (OCT). The system includes an improved interferometric system for metrology, detection, ranging as well as imaging system based on optical coherence tomography (OCT). Further, the method provides advancements in detection, imaging of samples in biological, medical, ophthalmic, corneal and retinal diagnosis.

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    23. Optical coherence tomographic imaging device and imaging method of optical coherence tomographic image

      Optical coherence tomographic imaging device and imaging method of optical coherence tomographic image

      An optical tomographic imaging device and the like which suppress influence in the case of a measuring beam being truncated by an iris, and can ensure reliability of a tomographic image which is acquired, when imaging the tomographic image of a retina in an eyeground of an examined eye. An optical tomographic imaging device is configured to have an observation unit observing a state of irradiating an examined object with the measuring beam, and imaging a state of the measuring beam being incident on the examined object as an observation image, a recording unit recording the observation image by linking ...

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    24. Linearized variable-dispersion spectrometers and related assemblies

      Linearized variable-dispersion spectrometers and related assemblies

      Wavenumber linear spectrometers are provided including an input configured to receive electromagnetic radiation from an external source; collimating optics configured to collimate the received electromagnetic radiation; a dispersive assembly including first and second diffractive gratings, wherein the first diffraction grating is configured in a first dispersive stage to receive the collimated electromagnetic radiation and wherein the dispersive assembly includes at least two dispersive stages configured to disperse the collimated input; and an imaging lens assembly configured to image the electromagnetic radiation dispersed by the at least two dispersive stages onto a linear detection array such that the variation in frequency ...

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    1-24 of 1732 1 2 3 4 ... 71 72 73 »
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