title: Ultrasonic system for accurate distance measurement in the air.
abstract: This paper presents a system that accurately measures the distance travelled by ultrasound waves through the air. The simple design of the system and its obtained accuracy provide a tool for non-contact distance measurements required in the laser's optical system that investigates the surface of the eyeball.
authors.affiliation: Institute of Physics, Wrocław University of Technology, Wrocław, Poland. licznerski@medi.com.pl
authors.forename: Tomasz J
authors.initials: TJ
authors.lastname: Licznerski
authors.forename: Jarosław
authors.initials: J
authors.lastname: Jaroński
authors.forename: Dariusz
authors.initials: D
authors.lastname: Kosz