Coded Apertures Derived from the Fresnel Zone Plate

H. H. Barrett; W. W. Stoner; D. T. Wilson; G. D. DeMeester

doi:10.1117/12.7978722

1 December 1974 Coded Apertures Derived from the Fresnel Zone Plate

H. H. Barrett, W. W. Stoner, D. T. Wilson, G. D. DeMeester

Author Affiliations +

Optical Engineering, Vol. 13, Issue 6, 136539 (December 1974). https://doi.org/10.1117/12.7978722

Abstract

Mertz and Young introduced the idea of using a Fresnel zone plate as a shadow-casting reticle, or coded aperture, in X-ray astronomy. More recently, considerable progress has been made toward using the zone-plate aperture for gamma-ray imaging in nuclear medicine. The most successful configuration has used an off-axis section of a zone plate in conjunction with a halftone screen. In this paper, we discuss a variety of closely related coded apertures, including an annulus, an inverted zone plate, a spiral zone plate, and the Girard grill. In most cases, the technique of grid-coded subtraction is used to suppress the zero-order (DC) background light usually associated with zone-plate imaging. The first application of this technique, reported by Stoner et al., used a sequence of two to four on-axis zone plates. In the present paper it is shown that the method can be extended to other apertures and is also very useful in synthesizing the spatial filters for optical decoding.

Citation Download Citation

H. H. Barrett, W. W. Stoner, D. T. Wilson, and G. D. DeMeester "Coded Apertures Derived from the Fresnel Zone Plate," Optical Engineering 13(6), 136539 (1 December 1974). https://doi.org/10.1117/12.7978722

Published: 1 December 1974

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available