The To-and-Fro Zone Plate (TFZP) Method for Observing Frequency Characteristics in Three Dimensions
A simple and efficient method, the to-and-fro movement of a circular zone plate (TFZP), is proposed for the study of frequency characteristics in three dimensions: horizontal, vertical, and temporal. With this method, the circular zone plate (CZP) is moved reciprocally at various speeds in a horizontal or vertical direction. The mathematical bases for the evaluation of the TFZP are explained, and diverse applications are enumerated. Pictures obtained by this method on a television display show three-dimensional frequency characteristics, just as those of a stationary CZP, which has been referred to as CZP so far, show two-dimensional characteristics for static pictures.
- Print ISSN
- 0036-1682
- Published
- 1986-09
- Content type
- Original Research
- DOI
- 10.5594/J03246
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