title: Adaptive self-mixing vibrometer based on a liquid lens.
abstract: A self-mixing laser diode vibrometer including an adaptive optical element in the form of a liquid lens (LL) has been implemented and its benefits demonstrated. The LL arrangement is able to control the feedback level of the self-mixing phenomenon, keeping it in the moderate feedback regime, particularly suitable for displacement measurements. This control capability has enabled a remarkable increase in the sensor-to-target distance range where measurements are feasible. Target vibration signal reconstructions present a maximum error of lambda radical16 as compared with a commercial sensor, thus providing an improved working range of 6.5 cm to 265 cm.
authors.affiliation: Centre de Desenvolupament de Sensors, Instrumentació i Sistemes (CD6), Universitat Politecnica de Catalunya,Rambla Sant Nebridi 10 E08222 Terrassa, Spain. usman.zabit@enseeiht.fr
authors.forename: U
authors.initials: U
authors.lastname: Zabit
authors.forename: R
authors.initials: R
authors.lastname: Atashkhooei
authors.forename: T
authors.initials: T
authors.lastname: Bosch
authors.forename: S
authors.initials: S
authors.lastname: Royo
authors.forename: F
authors.initials: F
authors.lastname: Bony
authors.forename: A D
authors.initials: AD
authors.lastname: Rakic