title: Accurate Length Measurement of Meter Bar with Helium-Neon Laser.
abstract: A helium-neon gas laser has been successfully used in conjunction with an automatic fringe-counting interferometer to measure the length of a meter bar. The agreement obtained was 7 parts in 100 million with respect to the assigned length of the bar.
authors.forename: K D
authors.initials: KD
authors.lastname: Mielenz
authors.forename: H D
authors.initials: HD
authors.lastname: Cook
authors.forename: K E
authors.initials: KE
authors.lastname: Gillilland
authors.forename: R B
authors.initials: RB
authors.lastname: Stephens