Version 1
: Received: 19 September 2024 / Approved: 19 September 2024 / Online: 20 September 2024 (07:24:37 CEST)
How to cite:
Aluf, O. Optical Coherent Tomography Four Optical Couplers and Attenuator Balance System. Preprints2024, 2024091566. https://doi.org/10.20944/preprints202409.1566.v1
Aluf, O. Optical Coherent Tomography Four Optical Couplers and Attenuator Balance System. Preprints 2024, 2024091566. https://doi.org/10.20944/preprints202409.1566.v1
Aluf, O. Optical Coherent Tomography Four Optical Couplers and Attenuator Balance System. Preprints2024, 2024091566. https://doi.org/10.20944/preprints202409.1566.v1
APA Style
Aluf, O. (2024). Optical Coherent Tomography Four Optical Couplers and Attenuator Balance System. Preprints. https://doi.org/10.20944/preprints202409.1566.v1
Chicago/Turabian Style
Aluf, O. 2024 "Optical Coherent Tomography Four Optical Couplers and Attenuator Balance System" Preprints. https://doi.org/10.20944/preprints202409.1566.v1
Abstract
Optical Coherence Tomography (OCT) is a non-invasive diagnostic technique that renders an in vivo cross-sectional view of the retina. OCT utilizes a concept known as interferometry to create a cross-sectional map of the retina that is accurate to within at least 10-15 microns. Due to the transparency of the eye, OCT has gained wide popularity as an ophthalmic diagnostic tool. The OCT pictures of the retina are classified into “AMD, CNV, DRUSEN, DMR, DR, MH, CSR, and Normal Eye” using a lightweight deep neural network. There are two types of FD-OCT – swept-source OCT (SS-OCT) and spectral-domain OCT (SD-OCT) – both of which acquire spectral interferograms which are then Fourier transformed to obtain an axial scan of reflectance amplitude versus depth. Normal OCT features show a clear and defined retinal structure. The random forest algorithm is a robust ML algorithm that can be used to classify OCT images into four classes: choroidal neovascularization (CNV), deep margin elevation (DME), drusen, and normal. OCT (Optical coherent tomography) is an imaging method used to generate a picture of the back of the eyes and retinas. By using an interferometer, part of the light is directed to the sample and another portion is sent to a reference arm with a well-known length. Interferometers merge two or more sources of light to create interference patterns. We split the light into two beams that travel different optical paths and are combined to produce interference. Optical coherent tomography (OCT) generates sub-surface images of translucent or opaque materials at a resolution equivalent to a low power microscope. OCT build up clear 3D images of thick samples by rejecting background signals whilst collecting light directly reflected from a surface of interest. OCT systems use broadband sources and split light in a fiber coupler, first on a direct reference mirror, and as the sample is being measured. Balanced OCT systems can include additional attenuators at the detector arm to improve the detection efficiency.
Keywords
OCT; TD‐OCT; FD‐OCT; Balance OCT system; Unbalance OCT system; Attenuator; SNR; Mean photo current; beam splitter units; Mirror reflectivity; Power measure; Aiming source
Subject
Physical Sciences, Optics and Photonics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
