Abstract
An off-axis Fresnel zone plate may be used as a large-area "coded" aperture for imaging incoherent sources. The zone plate is sufficiently coarse that only shadow-casting, and not diffraction, is involved. It is shown here that the usefulness of this system can be greatly increased by using a half-tone screen to introduce a spatial carrier frequency and heterodyne the object spectrum into the passband of the zone plate.
Original language | English (US) |
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Pages (from-to) | 398-401 |
Number of pages | 4 |
Journal | Optics Communications |
Volume | 5 |
Issue number | 5 |
DOIs | |
State | Published - Aug 1972 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering