1. Articles from Gyanendra Sheoran

    1-2 of 2
    1. Swept-source digital holography to reconstruct tomographic images

      Swept-source digital holography to reconstruct tomographic images
      We present what we believe to be a new method of swept-source digital holography using a superluminescent diode (SLD) as a broadband light source and an acousto-optic tunable filter (AOTF) as a frequency tunable device. The swept source consists of an SLD as a broadband source in conjunction with the AOTF as the frequency tuning device in the wavelength range of 800–870 nm. Since the AOTF is an electronically controlled device, frequency tuning can be achieved without mechanical movement . The angular spectrum approach to the scalar diffraction theory is used to reconstruct the images for each wavelength. Applications of ...
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    2. Full-field swept-source optical coherence tomography with Gaussian spectral shaping

      Satish Kumar Dubey, Gyanendra Sheoran, Tulsi Anna et al. A swept source system was realized in the wavelength range of 810-875 nm with the combination of a broad-band superluminescent diode (SLD) and an acousto-optic tunable filter (AOTF) as a frequency-tuning device. SLD has two spectral centers at 820 nm and 845 nm with spectral bandwidth (FWHM) of arou ... [Proc. SPIE 7155, 71551F (2008)] published Fri Oct 3, 2008.
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    1-2 of 2
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  2. Topics in the News

    1. (2 articles) Indian Institute of Technology at Delhi
    2. (1 articles) Soochow University
    3. (1 articles) LuEsther T. Mertz Retinal Research Center
    4. (1 articles) University of Ulsan
    5. (1 articles) National Institutes of Health
    6. (1 articles) Optovue
    7. (1 articles) Carl Zeiss Meditec
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    Swept-source digital holography to reconstruct tomographic images Emerging Minimally Invasive Technologies for the Detection of Skin Cancer Update on Optical Coherence Tomography and Optical Coherence Tomography Angiography Imaging in Proliferative Diabetic Retinopathy A diagnostic information based framework for super-resolution and quality assessment of retinal OCT images Impact of image averaging on vessel detection using optical coherence tomography angiography in eyes with macular oedema and in healthy eyes Alteration in Choroidal Microvasculature Determined by Optical Coherence Tomography Angiography in Patients with Acromegaly Optic disc Edema in patients with fibrous dysplasia/McCune-Albright syndrome: Craniomorphometric analysis and peripapillary retinal nerve fiber layer data MF-Net: Multi-Scale Information Fusion Network for CNV Segmentation in Retinal OCT Images Dynamic assessment of variations in pupil diameter using swept-source anterior segment optical coherence tomography after phakic collamer lens implantation No regrets: intravascular imaging, vascular calcification and underdeployed stents… Zone-wise examination of optical coherence tomography features and their correspondence to multifocal electroretinography in eyes with nonproliferative diabetic retinopathy Optical coherence tomography-defined vulnerable plaque characteristics in relation to functional severity of coronary stenoses stratified by quantitative flow ratio