The disappearance of self-mixing fringes in the moderate feedback regime decreases the
displacement measurement accuracy. The proposed method detects and compensates the …

This paper presents a general displacement reconstruction algorithm for sensors based on
self-mixing (SM) interferometry suitable to work at different optical feedback conditions. The …

A new algorithm for self-mixing (SM) sensors has been developed to perform displacement
measurements. It is able to differentiate between the different SM regimes (very weak, weak, …

A robust phase measurement method to detect self-mixing signals from rough surface targets
is addressed. Using the Hilbert transform to create the analytic signal of the monitored …

A neural network (NN) was developed in order to increase the distance range of a phase-shift
laser range finder and to achieve surface recognition, by using two photoelectrical signals …

Background There are limited data regarding the incidence of pneumothorax in COVID-19
patients as well as the impact of the same on patient outcomes. Methods A retrospective …

The fringes disappearance phenomenon in the self-mixing interferometry occurs whenever
the external round-trip phase at free-running state is modulated by either external modulation …

A self-mixing (SM) laser displacement sensor coupled with a microelectromechanical system
(MEMS) accelerometer is presented that enables reliable displacement measurements …

In this Letter, we experimentally show that transient phenomenons in self-mixing signals
from a moving target contain information about the target reflectivity and distance. These …

A displacement sensor enabling us to perform measurements under moderate feedback has
been designed with a resolution up to 40 nm . Its performance can be optimized by using …