The limitations of superresolving filters in imaging systems are investigated. The constraints on... more The limitations of superresolving filters in imaging systems are investigated. The constraints on such filters in the nonscanning imaging mode are discussed. The possible advantages of such filters in confocal scanning imaging are highlighted. It is shown theoretically and verified experimentally that simply designed complex-amplitude filters can be used effectively to double the exit pupil of a confocal imaging system and thus improve resolution. Superresolution can be achieved with acceptable energy losses and manufacturing tolerances.
The relationship between the transverse and the on-axis behaviors of various pupil-plane filters ... more The relationship between the transverse and the on-axis behaviors of various pupil-plane filters is described. Expressions for general energy constraints associated with these filters are also derived. Transverse and axial diffraction properties of filters with quadratic radial transmittance are demonstrated experimentally.
Interference patterns generated by a plane-parallel plate
Applied Optics, 1993
A simple geometrical theory is developed to evaluate the interference pattern that is generated b... more A simple geometrical theory is developed to evaluate the interference pattern that is generated by a plane-parallel plate illuminated with a monochromatic point source. It is shown that a specific tilt of the plate exists with respect to incident illumination, at which the spatial distribution of the interference fringes becomes uniform. Experimental evaluation of the fringe patterns by superposition moiré techniques supports the theoretical results.
The limitations of superresolving filters in imaging systems are investigated. The constraints on... more The limitations of superresolving filters in imaging systems are investigated. The constraints on such filters in the nonscanning imaging mode are discussed. The possible advantages of such filters in confocal scanning imaging are highlighted. It is shown theoretically and verified experimentally that simply designed complex-amplitude filters can be used effectively to double the exit pupil of a confocal imaging system and thus improve resolution. Superresolution can be achieved with acceptable energy losses and manufacturing tolerances.
The relationship between the transverse and the on-axis behaviors of various pupil-plane filters ... more The relationship between the transverse and the on-axis behaviors of various pupil-plane filters is described. Expressions for general energy constraints associated with these filters are also derived. Transverse and axial diffraction properties of filters with quadratic radial transmittance are demonstrated experimentally.
Interference patterns generated by a plane-parallel plate
Applied Optics, 1993
A simple geometrical theory is developed to evaluate the interference pattern that is generated b... more A simple geometrical theory is developed to evaluate the interference pattern that is generated by a plane-parallel plate illuminated with a monochromatic point source. It is shown that a specific tilt of the plate exists with respect to incident illumination, at which the spatial distribution of the interference fringes becomes uniform. Experimental evaluation of the fringe patterns by superposition moiré techniques supports the theoretical results.
Uploads
Papers by Z. Hegedus