Holographic laser beam deflector.

@article{Pole1975HolographicLB,
  title={Holographic laser beam deflector.},
  author={R V Pole and H P Wollenmann},
  journal={Applied optics},
  year={1975},
  volume={14 4},
  pages={976-80}
}
A mechanically rotating laser beam deflector is described that consists of several transmission type volume holograms recorded on a cylindrical surface. Its performance characteristics are compared with those of a multifacetted rotating mirror.