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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 4,
  • Issue 9,
  • pp. 515-517
  • (2006)

Simple Strehl ratio based method for pupil phase mask's optimization in wavefront coding system

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Abstract

By applying the wavefront coding technique to an optical system, the depth of focus can be greatly increased. Several complicated methods have already been taken to optimize for the best pupil phase mask in ideal condition. Here a simple Strehl ratio based method with only the standard deviation method used to evaluate the Strehl ratio stability over the depth of focus is applied to optimize for the best coefficients of pupil phase mask in practical optical systems. Results of imaging simulations for optical systems with and without pupil phase mask are presented, and the sharpness of image is calculated for comparison. The optimized pupil phase mask shows good results in extending the depth of focus.

© 2006 Chinese Optics Letters

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