We demonstrate the feasibility of achieving superresolved images by using Fourier-plane phase masks and image multiplication, which together create effective point-spread functions that are not positive definite and therefore cannot be created by any single Fourier plane mask in a linear system. Three different configurations were investigated, all of which gave a spatial resolution exceeding that corresponding to the full open aperture of the optical system. One price that must be paid for the superresolution is inefficient use of the light source.
© 2002 Optical Society of America
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(100.6640) Image processing : Superresolution
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(350.5730) Other areas of optics : Resolution
I. Leizerson, S. G. Lipson, and V. Sarafis, "Superresolution in far-field imaging," J. Opt. Soc. Am. A 19, 436-443 (2002)