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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 63, Iss. 4 — Apr. 1, 1973
  • pp: 445–449

Focal depth of a transmitting axicon

John W. Y. Lit and Réal Tremblay  »View Author Affiliations

JOSA, Vol. 63, Issue 4, pp. 445-449 (1973)

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The transmitting axicon is examined for the axial field distribution of a regular axicon when the incident wave is plane and uniform, and when it has a gaussian irradiance distribution. In the microwave region, the focal depth of an axicon does not differ very much from that of a perfect lens. In the visible region, the axicon possesses a much greater focal depth, which can be greatly changed by changing the curvature of the slanting side of the axicon. For an axicon with a straight slanting side and small height, when a gaussian incident wave is used, the irradiance at the principal focus varies inversely with the focal length.

John W. Y. Lit and Réal Tremblay, "Focal depth of a transmitting axicon," J. Opt. Soc. Am. 63, 445-449 (1973)

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