1. Articles from Tarek A. Al-Saeed

    1-3 of 3
    1. Time-domain optical coherence tomography system based on moving-optical-wedge interferometer

      Time-domain optical coherence tomography system based on moving-optical-wedge interferometer

      In this work we present a time-domain optical coherence tomography system based on moving-optical-wedge interferometer. This device has the advantage of suppressing motion artifact. The major problem with such a system is dispersion in the wedge material. We propose an algorithm for compensation of such dispersion. Moreover, we investigate the effect of dispersion in resolution. So, we introduced artificial high dispersion in the wedge material to clarify this effect. Resolution is improved from 10 µm to 5 µm. Thus we can consider dispersion is a bless in improving resolution.

      Read Full Article
    2. Study of dual-source Fourier-domain optical coherence tomography

      Study of dual-source Fourier-domain optical coherence tomography

      Optical coherence tomography (OCT) is a very high-resolution imaging technique whose resolution depends on source bandwidth. Improving resolution is an important topic of research in OCT. Thus, to improve resolution, the bandwidth of the source must be increased. Practical sources have finite bandwidth. Therefore, it is suggested to use more sources. Previous work expected that resolution will be inevitably improved without mentioning to what extent it will be improved and without any referencing to the effect of spectral separation between the sources. We study the resolution of a Fourier-domain OCT (FD-OCT) system based on two sources. First, we show to ...

      Read Full Article
    3. Dispersion compensation in Fourier domain optical coherence tomography

      Dispersion compensation in Fourier domain optical coherence tomography

      In this work, we propose a numerical technique to compensate for errors due to dispersion effects in Fourier domain optical coherence tomography. The proposed technique corrects for errors in depth measurements and resolution loss due to dispersion. The results show that, by using this technique, errors in thickness measurement are reduced from about 5% to less than 0.1% depending on the sample length and the amount of dispersion. Also, an improvement in the resolution from about 50 μm to less than 10 μm is demonstrated.

      Read Full Article
    1-3 of 3
  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
  2. Topics in the News

    There are no recent topics in the news.

  3. Popular Articles

  4. Picture Gallery

    Dispersion compensation in Fourier domain optical coherence tomography Study of dual-source Fourier-domain optical coherence tomography Time-domain optical coherence tomography system based on moving-optical-wedge interferometer Optical Coherence Tomography Angiography in Myopic Patients Quantification of retinal microvasculature and neurodegeneration changes in branch retinal vein occlusion after resolution of cystoid macular edema on optical coherence tomography angiography Machining head for a laser machining device Quantitative Comparison Of Microvascular Metrics On Three Optical Coherence Tomography Angiography Devices In Chorioretinal Disease Detection of and validation of shadows in intravascular images Automated intravascular plaque classification Detection of stent struts relative to side branches Role of optical coherence tomography for distal left main stem angioplasty Measurement of the Shrinkage of Natural and Simulated Lesions on Root Surfaces using CP-OCT