Real-time visualization of retinal microcirculation by laser flowgraphy

Naoki Konishi; Hitoshi Fujii

doi:10.1117/12.195203

1 March 1995 Real-time visualization of retinal microcirculation by laser flowgraphy

Naoki Konishi, Hitoshi Fujii

Author Affiliations +

Optical Engineering, Vol. 34, Issue 3, (March 1995). https://doi.org/10.1117/12.195203

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.

Citation Download Citation

Naoki Konishi and Hitoshi Fujii "Real-time visualization of retinal microcirculation by laser flowgraphy," Optical Engineering 34(3), (1 March 1995). https://doi.org/10.1117/12.195203

Published: 1 March 1995

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