Self-mixing laser velocimeter for retinal blood flow measurements

Stefano Cattini; Giorgia Salvatori; Luigi Rovati

doi:10.1117/12.700743

5 March 2007 Self-mixing laser velocimeter for retinal blood flow measurements

Stefano Cattini, Giorgia Salvatori, Luigi Rovati

Proceedings Volume 6426, Ophthalmic Technologies XVII; 642611 (2007) https://doi.org/10.1117/12.700743
Event: SPIE BiOS, 2007, San Jose, California, United States

Abstract

A Doppler velocimeter exploiting a self-mixing laser diode is proposed. The system has been design to evaluate the retinal blood flow velocity. The central frequency of the Doppler band obtained from the self-mixing laser diode measurement is related to the blood flow velocity in the vessel under test. The measurement can be done under the light-intensity feedback ratio below -100 dB without using highly sensitive electronics since the laser acts as a high-efficiency mixer oscillator and a shot-noise-limited quantum detector. The advantages in adopting such technique consist in its low cost, easiness of implementation and small size. Moreover, the self-mixing laser diode method offers the advantage to have the excitation and measurement beams spatially overlapped overcoming the alignment difficulty due to limited optical accessibility imposed by the finite aperture of the pupil.

Citation Download Citation

Stefano Cattini, Giorgia Salvatori, and Luigi Rovati "Self-mixing laser velocimeter for retinal blood flow measurements", Proc. SPIE 6426, Ophthalmic Technologies XVII, 642611 (5 March 2007); https://doi.org/10.1117/12.700743

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