1. Articles in category: Patents

    1-24 of 1785 1 2 3 4 ... 73 74 75 »
    1. Low coherence interferometry with scan error correction

      Low coherence interferometry with scan error correction

      A system includes an interference microscope having one or more optical elements arranged to image a test object to an image plane by combining test light from the test object with reference light from a reference object to form an interference pattern at the image plane, wherein the test and reference light are derived from a common broadband light source. The system includes a scanning stage configured to scan an optical path difference (OPD) between the test and reference light, a multi-element detector positioned at the image plane and configured to record the interference pattern for each of a series ...

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    2. Measuring apparatus and exposure device

      Measuring apparatus and exposure device

      An apparatus includes a system configured to split a light emitted from a light source into reference light and subject light, cause the subject light to enter into an object, and combine the subject light reflected by the object with the reference light, a detection unit configured to detect coherent light between the combined subject and reference lights, an element, provided within a light path of the reference light or the subject light, configured to change a path length difference between the reference light and the subject light and a relative position between the reference light and the subject light ...

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    3. Image processing apparatus, image processing method, image processing system, SLO apparatus, and program

      Image processing apparatus, image processing method, image processing system, SLO apparatus, and program

      n image processing apparatus includes an SLO image acquisition unit configured to acquire a plurality of SLO images obtainable by an SLO apparatus that scans a target to be captured with signal light at various focus positions in an optical axis direction of the signal light. The image processing apparatus includes a structure acquisition unit configured to acquire a specific structure of the target to be captured. The image processing apparatus includes an object image acquisition unit configured to acquire an image of the specific structure from each of the plurality of SLO images captured at various focus positions according ...

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    4. Ophthalmological Imaging Apparatus And Ophthalmological Image Display Device

      Ophthalmological Imaging Apparatus And Ophthalmological Image Display Device

      Provided is a novel technique for ophthalmological image diagnosis. The ophthalmological imaging apparatus according to an embodiment comprises: an acquisition unit for acquiring three dimensional image data for an eye being tested using optical coherence tomography; a designating section for designating partial image data, which is a portion of the three dimensional image data that corresponds to a specified region of the eye being tested; a modifying section for generating new three dimensional data by modifying the three dimensional data so that said partial image data is modified to a previously established form; a forming section for forming cross-sectional image ...

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    5. Reconstruction Of Optical Coherent Tomography (OCT) Images Of Morphological Features

      Reconstruction Of Optical Coherent Tomography (OCT) Images Of Morphological Features

      Imaging devices and processing techniques based on imaging information along the depth direction in an optical coherent tomography (OCT) image are disclosed to enhance observed morphological features. The methods and systems obtain different OCT images of the target object under different reference path lengths, process the different OCT images to obtain a derivative with respect to the signal path length of image information of the different images, and processing the derivative to extract improved image information of the target object. The derivatives may be in a form related to a gradient value of the normalized OCT image intensity, or an ...

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    6. System For Robotic Assisted Cataract Surgery

      System 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.

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    7. Optical Coherence Tomography Apparatus For Selectively Visualizing And Analyzing Choroid Vascular Plexus, And IMAGE-PROCESSING Program And IMAGE-PROCESSING Method Therefor

      Optical Coherence Tomography Apparatus For Selectively Visualizing And Analyzing Choroid Vascular Plexus, And IMAGE-PROCESSING Program And IMAGE-PROCESSING Method Therefor

      From OCT measurement data, image data for only the choroid vascular plexus present in the choroid layer is selectively extracted and the size of the choroid blood vessels and thickness of the choroid vascular plexus are obtained accurately from the image data, making quantitative evaluation of the choroid vascular plexus possible. The optical coherence tomography apparatus is provided with an optical coherence tomograph and a computer for performing image-processing on the three-dimensional OCT tomographic image obtained on the basis of the OCT measurement data acquired by the optical coherence tomogrph. The computer functions as a means for selectively isolating only ...

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    8. Compact multimodality optical coherence tomography imaging systems

      Compact multimodality optical coherence tomography imaging systems

      Systems for imaging a sample are provided. The system includes an optical coherence tomography (OCT) imaging portion having an associated OCT path defined by one set of optical elements between an OCT signal delivery optical fiber and the sample; an image capture portion having an associated image capture path defined by a second set of optical elements between an image capture device and the sample, different from the OCT path; and an illuminator portion having an associated illumination path defined by a third set of optical elements between an illumination source and the sample. The OCT path, the image capture ...

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    9. Enhanced biometry using optical coherence tomography

      Enhanced biometry using optical coherence tomography

      An imaging method is disclosed. An imaging method according to some embodiments can include obtaining a plurality of measurements of an eye for at least one location by scanning optical radiation across the eye; determining a preferred measurement axis from the plurality of measurements; and processing the plurality of measurements to obtain information of the eye.

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    10. Optical imaging method and optical imaging apparatus using optical coherence tomography

      Optical imaging method and optical imaging apparatus using optical coherence tomography

      An optical imaging method in an embodiment includes: a scanning step to scan each of a plurality of A-lines of an object with a signal light while alternately changing the phase difference between the signal light and a reference light to two preset phase differences; a detection step to detect the interference light of the signal light passing through the A-line and the reference light; and an imaging step to generate a complex interference spectrum based on the detection results of the interference lights corresponding to the plurality of A-lines sequentially obtained in the detection step according to the scanning ...

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    11. Tuneable laser source

      Tuneable laser source

      Described herein is a laser (1) having a cavity for supporting oscillation of an electromagnetic signal to provide lasing action. A gain element (5) provides a source of stimulated emission for amplifying the oscillating signal. The laser also includes a wavelength selective element (7), which includes a reflecting element and a polarization modifying element. The reflecting element selectively defines a predetermined wavelength and the polarization modifying element selectively modifies the polarization of the signal component at the predetermined wavelength so as to provide high selectivity. The wavelength selective element (7) rotates the signal polarization at the predetermined wavelength into an ...

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      Mentions: Finisar
    12. Multilayered tissue phantoms, fabrication methods, and use

      Multilayered tissue phantoms, fabrication methods, and use

      A method for producing a multilayer tissue phantom involves successively forming at least two layers, each layer formed by depositing a viscous flowable material over a supporting element or over a previously formed layer of the phantom supported by the supporting element, selectively redistributing the material while material is solidifying to control a thickness distribution of the layer, and allowing the material to solidify sufficiently to apply a next layer. The supporting element supports the material in 2 or 3 directions and effectively molds a lumen of the tissue. The neighboring layers are of different composition and of chosen thickness ...

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    13. Method and device for early non-invasive diagnosis of fruit tree disease

      Method and device for early non-invasive diagnosis of fruit tree disease

      The present invention relates to a non-invasive early diagnostic method and device that allows an early diagnosis of Marssonina blotch disease, which infects apple tree leaves, before the occurrence of lesions to enable early prevention of apple Marssonina blotch disease. The method and device of the present invention comprise the following steps: irradiating a broadband light source on an apple tree leaf undergoing diagnosis by means of optical coherence tomography; detecting interference signals from light reflected from the apple tree leaf undergoing diagnosis and light reflected from a reference arm; signal processing the interference signals, which have been detected through ...

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    14. Surgical microscope system for ophthalmology, and associated detection unit

      Surgical microscope system for ophthalmology, and associated detection unit

      A surgical microscope system (100) for ophthalmology, in particular for cataract surgery, comprising a surgical microscope (10) having an optical viewing unit (13), is proposed, in which an optical coherence tomograph (20) is set up to scan at least a region of a lens (53) of an eye (50) and to generate scan values, and in which a detection unit (30) is set up to generate, on the basis of the scan values, diagnostic data that correspond to light-reflecting structures in the scanned region of the eye (50) and that derive from a plane of the eye (50) that corresponds ...

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    15. Method and apparatus for cochlear implant surgery

      Method and apparatus for cochlear implant surgery

      A system for cochlear implant surgery includes a reference device having at least a portion adapted to be arranged at a fixed position relative to a cochlea of a patient to provide a reference position, an image acquisition and processing system adapted to acquire an image of at least a portion of the cochlea relative to the reference position and to provide an implant plan based at least partially on the acquired image, and an implant system adapted for implanting a cochlear lead array using the reference position and the implant plan.

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    16. OCT device

      OCT device

      A photodetector of an OCT device is provided with: a silicon substrate comprised of a semiconductor of a first conductivity type, having a first principal surface and a second principal surface opposed to each other, and having a semiconductor region of a second conductivity type formed on the first principal surface side; and charge transfer electrodes provided on the first principal surface and transferring generated charges. In the silicon substrate, an accumulation layer of the first conductivity type having a higher impurity concentration than the silicon substrate is formed on the second principal surface side, and an irregular asperity is ...

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    17. Two beams formed by Wollaston prism in sample arm in an optical coherence tomography apparatus

      Two beams formed by Wollaston prism in sample arm in an optical coherence tomography apparatus

      The scanning speed of a sample in Doppler OCT, etc., is increased to enable quick measurement of blood flow rate, blood flow volume, etc. Wideband light from a light source 2 is linearly polarized by a polarization controller 3 and this linearly polarized beam is split into vertically polarized light and horizontally polarized light using a Wollaston prism 14 at a sample arm, which are then irradiated simultaneously onto two different locations of the sample in the scanning direction using a galvanometer mirror 18, and reference light from a reference arm 5 and object light from a sample arm 6 ...

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    18. Method and device for fast tuning of optical sources

      Method and device for fast tuning of optical sources

      A method and device are provided for fast, continuous tuning of an optical source. A first pump signal with a first pump frequency is input into a mixer along with a first seed signal having a first seed frequency. Within the mixer, the first pump signal and the first seed signal generate at least one idler having an idler frequency defined as two times the pump frequency minus the seed frequency. Shifting the pump signal across a frequency range at a sweep rate causes the idler frequency to be shifted by two times the frequency range at two times the ...

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    19. System And Method For Acquiring Slice Image In Blood Vessel Using Optical Coherence Tomography Device And Imaging Catheter

      System And Method For Acquiring Slice Image In Blood Vessel Using Optical Coherence Tomography Device And Imaging Catheter

      The present invention provides a system and a method for acquiring a slice image in a blood vessel using an optical coherence tomography (OCT) device and an imaging catheter, the system for acquiring a slice image in a blood vessel comprising: a micro-catheter inserted into a blood vessel so as to assist the forward movement of another catheter; a micro-wire for guiding the forward movement of the catheter connected by being inserted into the blood vessel; an OCT imaging catheter including an optical fiber, which is connected to the micro-wire so as to be inserted into the blood vessel according ...

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    1-24 of 1785 1 2 3 4 ... 73 74 75 »
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