title: Aberrations of the perfect grating rhomb.
abstract: The aberrations caused by a perfect grating rhomb beam sampler are calculated for a diverging beam. In the geometric optics limit a tilt does not appear, whereas astigmatism and higher-order aberrations are introduced by a perfect grating rhomb.
authors.forename: J
authors.initials: J
authors.lastname: Herrmann
authors.forename: C A
authors.initials: CA
authors.lastname: Primmerman