Transformation-designed optical elements.

@article{Schurig2007TransformationdesignedOE,
  title={Transformation-designed optical elements.},
  author={David Schurig and John Brian Pendry and D. Robert Smith},
  journal={Optics express},
  year={2007},
  volume={15 22},
  pages={
          14772-82
        }
}
We describe transformation design of optical elements which, in addition to image transfer, perform useful operations. For one class of operations, including translation, rotation, mirroring and inversion, an image can be generated that is ideal in the sense of the perfect lens (combining both near- and far-field components in a flat, unit transfer function, up to the limits imposed by material imperfection). We also describe elements that perform magnification, free from geometric aberrations… 

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