title: Lens distortion equation using moiré.
abstract: A technique for deriving the distortion equation of a lens system using moiré fringes is introduced, from which a correction factor equation is derived, making it unnecessary to use high quality lenses to make absolute measurements, as applicable to strain measuring instrumentation.
authors.forename: A M
authors.initials: AM
authors.lastname: Khalil
authors.forename: P
authors.initials: P
authors.lastname: Fazio