Laser self-mixing interferometry for measuring and analyzing micromovements of the eyeball

Karina A. Sadchikova; A. V. Dzhafarov; M. G. Inkin; S. Yu. Dobdin; An. V. Skripal

doi:10.1117/12.2626828

29 April 2022 Laser self-mixing interferometry for measuring and analyzing micromovements of the eyeball

Karina A. Sadchikova, A. V. Dzhafarov, M. G. Inkin, S. Yu. Dobdin, An. V. Skripal

Proceedings Volume 12193, Laser Physics, Photonic Technologies, and Molecular Modeling; 121930L (2022) https://doi.org/10.1117/12.2626828
Event: XXV Annual Conference Saratov Fall Meeting 2021; and IX Symposium on Optics and Biophotonics, 2021, Saratov, Russian Federation

Abstract

Laser interferometry for measuring micromovements of the eyeball has been investigated. A technique for processing an interference signal is proposed, which makes it possible to obtain graphs of the speed and acceleration of the eyeball through the closed eyelid. The unknown motion parameters are found from the frequency of the interference signal of the self-mixing laser system as a result of the windowed Fourier transform. The RLD78NZM5 module was used as a source of laser radiation. Experimental measurements were carried out to determine the parameters of eye movement on volunteers at the age of 20 years. For the first volunteer in a calm state, the velocities of the eyeball movement were in the range of up to 800 μm/s, and the accelerations were in the range of ±20 μm/s². For the second volunteer in a calm state, the velocities of the movement of the eyeball were in the range of up to 1300 μm/s, and the accelerations were in the range of up to 40 μm/s². The speed and acceleration of eyeball movements of the volunteers at rest had the lowest values. These parameters increased with eye movement. When the eye moved to the left and to the right, the speed of the eyeball movement of the first volunteer was higher than when the eye moved up and down. On the contrary, when the eye moved to the left and to the right, the velocities of the eyeball movement of the second volunteer were less than when the eye moved up and down. In addition, the analysis of the movement of the eyeball can be carried out even in its closed state. It has been shown that the physiological state of the somebody can influence the nature of eye movement. This influence can be used to assess the psychoemotional state and diagnose various pathologies of the oculomotor apparatus of the human body.

Citation Download Citation

Karina A. Sadchikova, A. V. Dzhafarov, M. G. Inkin, S. Yu. Dobdin, and An. V. Skripal "Laser self-mixing interferometry for measuring and analyzing micromovements of the eyeball", Proc. SPIE 12193, Laser Physics, Photonic Technologies, and Molecular Modeling, 121930L (29 April 2022); https://doi.org/10.1117/12.2626828

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Eye

Semiconductor lasers

Motion analysis

Reflectors

Signal processing

Visualization

Fourier transforms

Show All Keywords

Keywords/Phrases

Search In:

Publication Years