To study the three-dimensional (3-D) behavior produced by complex filters, we have extended the expressions for the axial and the transverse gain to the case in which the best image plane is not near the paraxial focus. Super-Gaussian phase filters are proposed to control the 3-D image response of an optical system. Super-Gaussian phase filters depend on several parameters that modify the shape of the phase filter, producing tunable control of the 3-D response of the optical system. The filters are capable of producing a wide range of optical effects: transverse superresolution with high depth of focus, 3-D superresolution, and transverse apodization with different axial responses.
© 2004 Optical Society of America
(110.0110) Imaging systems : Imaging systems
(220.0220) Optical design and fabrication : Optical design and fabrication
(220.1230) Optical design and fabrication : Apodization
(350.5730) Other areas of optics : Resolution
Silvia Ledesma, Juan Campos, Juan Carlos Escalera, and María J. Yzuel, "Simple expressions for performance parameters of complex filters, with applications to super-Gaussian phase filters," Opt. Lett. 29, 932-934 (2004)