title: Quasi-absolute measurement of aspheres with a combined diffractive optical element as reference.
abstract: We have already reported a method for the quasi-absolute test of rotationally symmetric aspheres by means of combined diffractive optical elements (combo-DOEs). The combo-DOEs carry the information for the ideal shape of an aspheric surface under test as well as a spherical wave for the measurement at the cat's eye position. An experimental demonstration of the procedure is given. Measurements with two different designs of combo-DOEs have been conducted, and their relative advantages and disadvantages are discussed.
authors.affiliation: Institute of Optics, Information and Photonics, Max-Planck Research Group, University of Erlangen Nürnberg, Erlangen, Germany. fsimon@optik.uni-erlangen.de
authors.forename: Frank
authors.initials: F
authors.lastname: Simon
authors.forename: Gufran
authors.initials: G
authors.lastname: Khan
authors.forename: Klaus
authors.initials: K
authors.lastname: Mantel
authors.forename: Norbert
authors.initials: N
authors.lastname: Lindlein
authors.forename: Johannes
authors.initials: J
authors.lastname: Schwider