International Journal of Infrared and Millimeter Waves

, Volume 17, Issue 12, pp 2159–2165

Cross-polarisation and astigmatism in matching grooves

  • James W. Lamb


Circular grooves are frequently cut in dielectric lenses and windows to form antireflection layers. These induce a phase difference between polarisation components, with consequent loss of power into cross-polarisation and a phase error similar to astigmatism. Expressions derived for these losses show that the losses are generally small compared to the insertion losses of an unmatched surface. For several consecutive surfaces the effects may be quite significant.


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    M. Born and E. Wolf:Principles of Optics, 6th ed., Oxford: Pergamon, 1980.Google Scholar
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    R. Bräuer and O. Bryngdahl, “Design of antireflection gratings with approximate and rigorous methods,”Appl. Opt., vol. 33, no. 34, pp. 7875–7882, Dec. 1994.Google Scholar
  3. [3]
    J. Ruze: “Antenna tolerance theory—A Review,”Proc. IEEE, Vol. 54, pp. 633–640, April 1966.Google Scholar

Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • James W. Lamb
    • 1
  1. 1.IRAMSt-Martin d'HèresFrance

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