A system for superresolution of temporally restricted objects allows one to transmit ultrawideband optical signals (objects) through a narrow aperture. Such a system was proposed, improved, and implemented for one- and two-dimensional objects. Implementing frequency-plane enhancement in this system provides the ability of spatial filtering of ultrawideband objects. A method for spatial filtering in a system for superresolution of temporally restricted objects by use of a generalized Dammann grating is suggested. An experimental demonstration of high-frequency enhancement (high-pass filtering) of one-dimensional objects is presented.
© 1998 Optical Society of America
David Mendlovic, David Farkas, Zeev Zalevsky, and Adolf W. Lohmann, "High-frequency enhancement by an optical system for superresolution of temporally restricted objects," Opt. Lett. 23, 801-803 (1998)