Strehl ratio of a Gaussian beam.

  title={Strehl ratio of a Gaussian beam.},
  author={Virendra N Mahajan},
  journal={Journal of the Optical Society of America. A, Optics, image science, and vision},
  volume={22 9},
We discuss the Strehl ratio of systems with a Gaussian pupil and determine the range of validity of its approximate expression based on the aberration variance. The results given are equally applicable to propagation of Gaussian beams. The uniform and weakly truncated pupils are considered as limiting cases of a Gaussian pupil. We show that the approximate expression for Strehl ratio in terms of the aberration variance yields a good estimate of the true value for a strongly truncated pupil but… CONTINUE READING