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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 28, Iss. 13 — Jul. 1, 1989
  • pp: 2666–2670

Arbitrarily high focal depth with a quasioptimum real and positive transmittance apodizer

Jorge Ojeda-Castaneda, E. Tepichin, and A. Diaz  »View Author Affiliations


Applied Optics, Vol. 28, Issue 13, pp. 2666-2670 (1989)
http://dx.doi.org/10.1364/AO.28.002666


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Abstract

Focal depth is assessed by the average value of the square modulus of the slope associated with the complex amplitude along the optical axis. Then, the calculus of variations is used for identifying the optimum apodizer, characterized by a Strehl ratio vs defocus with high focal depth, for a specified light throughput. We show that a certain Lorentzian profile is a quasioptimum solution for the above requirements. This apodizer has real and positive transmittance, and it can be modified to achieve arbitrarily high focal depth. A closed formula relates focal depth to light throughput.

© 1989 Optical Society of America

History
Original Manuscript: July 11, 1988
Published: July 1, 1989

Citation
Jorge Ojeda-Castaneda, E. Tepichin, and A. Diaz, "Arbitrarily high focal depth with a quasioptimum real and positive transmittance apodizer," Appl. Opt. 28, 2666-2670 (1989)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-28-13-2666

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