Accurate Length Measurement of Meter Bar with Helium-Neon Laser.
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.
Mielenz
K D
KD
Cook
H D
HD
Gillilland
K E
KE
Stephens
R B
RB