Coherent Processing and Depth of Focus of Annular Aperture Imagery
- 1 October 1971
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 10 (10) , 2226-2230
- https://doi.org/10.1364/ao.10.002226
Abstract
Images from high aspect ratio annulus apertures are spatially filtered in a coherent optical processor for equalization of the modulation transfer function. The imagery is relatively insensitive to spherical aberration, field curvature, and longitudinal color; and the depth of focus is substantially greater than that of conventional imagery with comparable resolution.Keywords
This publication has 10 references indexed in Scilit:
- Real-time Holographic Moiré Patterns for Flow VisualizationApplied Optics, 1968
- A Review of Optical Data-processing TechniquesOptica Acta: International Journal of Optics, 1968
- Instrumentation for radio astronomyPhysics Today, 1966
- Complex Spatial Filtering with Binary MasksApplied Optics, 1966
- A new method of image formation with annular apertures and an application in radio astronomyProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1965
- Some correction process for annular aerial systemsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1964
- A New Radioheliograph for AustraliaNature, 1962
- The improvement of images obtained with annular aperturesProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1961
- Circular aerial arrays for radio astronomyProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1961
- Transfer Function for an Annular Aperture*Journal of the Optical Society of America, 1956