title: Design of a laser beam line expander.
abstract: The design of an optical element for laser beam line expansion is described. The element which bears some resemblance to a prism with a small radius at its apex expands the laser beam in one direction only. The technique for designing such a lens is given together with examples of lenses having different rates of divergence.
authors.forename: I
authors.initials: I
authors.lastname: Powell