title: Optical method of measuring angular displacement using four photodiode arrays.
abstract: A method of measuring angular displacement is investigated that uses two pairs of photodiode arrays arranged in a square and crossed linear images produced with two cylindrical mirrors. According to this method the measurement error can be greatly reduced even when inclination of the rotation axis exists.
authors.affiliation: Utsunomiya University, Faculty of Engineering, Utsunomiya 321, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Sato
authors.forename: S
authors.initials: S
authors.lastname: Yamamoto
authors.forename: O
authors.initials: O
authors.lastname: Kamada
authors.forename: M
authors.initials: M
authors.lastname: Ochi