title: Precision absolute positional measurement of laser beams.
abstract: We describe an instrument which, coupled with a suitable coordinate measuring machine, facilitates the absolute measurement within the machine frame of the propagation direction of a millimeter-scale laser beam to an accuracy of around ±4 μm in position and ±20 μrad in angle.
authors.affiliation: Institute for Gravitational Research, School of Physics and Astronomy, Scottish Universities Physics Alliance, University of Glasgow, Glasgow, UK. ewan.fitzsimons@glasgow.ac.uk
authors.forename: Ewan D
authors.initials: ED
authors.lastname: Fitzsimons
authors.forename: Johanna
authors.initials: J
authors.lastname: Bogenstahl
authors.forename: James
authors.initials: J
authors.lastname: Hough
authors.forename: Christian J
authors.initials: CJ
authors.lastname: Killow
authors.forename: Michael
authors.initials: M
authors.lastname: Perreur-Lloyd
authors.forename: David I
authors.initials: DI
authors.lastname: Robertson
authors.forename: Henry
authors.initials: H
authors.lastname: Ward