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Optical Engineering

Real-time visualization of retinal microcirculation by laser flowgraphy
Author(s): Naoki Konishi; Hitoshi Fujii
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Paper Abstract

A new real-time measuring system is developed to visualize the blood flow map of the human retina using dynamic laser speckle effects and a hardware logic circuit. The retina is illuminated with a diode laser spot through a retinal camera, and the speckle field at the image plane of the spot is scanned by an area sensor. The output signal is analog-to-digital (A/D) converted and the blur rate of the intensity at each pixel point is evaluated through a hardware logic circuit specially developed for this system. The results are displayed in 2-D color maps successively at a rate of 16 frames/s, which allows the real-time observation of retinal blood flow.

Paper Details

Date Published: 1 March 1995
PDF: 5 pages
Opt. Eng. 34(3) doi: 10.1117/12.195203
Published in: Optical Engineering Volume 34, Issue 3
Show Author Affiliations
Naoki Konishi, Kyushu Institute of Technology (Japan)
Hitoshi Fujii, Kyushu Institute of Technology (Japan)

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