6533b7cffe1ef96bd125830d
RESEARCH PRODUCT
Non-Conventional Tunable Spatial Filtering
J. Ojeda-castanedaPedro AndrésA. Ponssubject
DiffractionSpatial filterPoint sourcebusiness.industryFraunhofer diffractionOptical axissymbols.namesakeTransverse planeFourier transformOpticssymbolsSpatial frequencybusinessMathematicsdescription
A virtual display of the Fraunhofer diffraction pattern of any object is formed in the transverse source plane by theyirtual diffracted rays extqn0ing in the region to the left of the screen containing the transparencyl),2). Except for a few cases '')"°), the concept of virtual Fourier transform appears not to have been made use of. The main idea of this paper is, bearing in mind the property referred to in the above paragraph, to describe a novel spatial filtering technique. In this way, one can obtain different filtered images, by simply moving the point source along the optical axis. The basic theory is described below.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1987-01-01 | SPIE Proceedings |