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Adaptive autofocus technique for speckle control in optical feedback interferometry

Autor
Atashkhooei, R.; Royo, S.; Azcona, F. J.
Tipus d'activitat
Article en revista
Revista
Sensors and actuators A. Physical
Data de publicació
2014-09-01
Volum
216
Pàgina inicial
243
Pàgina final
248
DOI
https://doi.org/10.1016/j.sna.2014.06.003 Obrir en finestra nova
Projecte finançador
NUEVO SENSOR INTERFEROMETRICO COMPACTO PARA APLIACIONES DEMETROLOGIA SIN CONTACTO DE ALTA RESOLUCIÓN
Repositori
http://hdl.handle.net/2117/25609 Obrir en finestra nova
URL
http://www.sciencedirect.com/science/article/pii/S0924424714002982 Obrir en finestra nova
Resum
An adaptive autofocus technique for the control of speckle effect in optical feedback interferometry (OFI) is discussed. The beam spot size effect over the OFI signal is presented, justifying the proposed approach. An automated setup for the control of speckle effect using a liquid lens with electro-optical focusing is demonstrated. The spot size is modified according to the signal to noise ratio (SNR) bounds selected for the captured OFI signal, therefore avoiding signal fading caused by speckl...
Citació
Atashkhooei, R.; Royo, S.; Azcona, F. Adaptive autofocus technique for speckle control in optical feedback interferometry. "Sensors and actuators A. Physical", 01 Setembre 2014, vol. 216, p. 243-248.
Paraules clau
Adaptive Measurements, Displacement Sensor, Feedback Control, Self-mixing Interferometry, Speckle Effect, Vibration Measurement, Self-mixing Interferometry, Laser-diode, Displacement, Vibration
Grup de recerca
CD6 - Centre de Desenvolupament de Sensors, Instrumentació i Sistemes
GREO - Grup de Recerca en Enginyeria Òptica

Participants