The Strehl ratio, in the form of McCutchen’s theorem, is employed to design a spatial filter that increases the depth of focus. Computer-simulated images show the increment in focal depth.
© 1985 Optical Society of America
Original Manuscript: June 7, 1985
Manuscript Accepted: August 2, 1985
Published: November 1, 1985
J. Ojeda-Castañeda, L. R. Berriel-Valdos, and E. Montes, "Spatial filter for increasing the depth of focus," Opt. Lett. 10, 520-522 (1985)