Computer Science
Scientific paper
Aug 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3553..239l&link_type=abstract
Proc. SPIE Vol. 3553, p. 239-246, Detectors, Focal Plane Arrays, and Imaging Devices II, Pingzhi Liang; Marc Wigdor; William G.
Computer Science
Scientific paper
The recording of the hologram in the optical scanning holography (OSH) proposed by T.C. Poon is a process in which a Fresnel zone plate (FZP) is used to scan the object, but since the spacing between two adjacent rings of FZP at the center portion is greater than that at the edge portion, the resolution capability of the system, which can resolve the edge portion of the FZP, is not fully exploited. The fact that a circular grating (CG) has uniform spacings everywhere, enlightens us to suggest the CG optical scanning holography. It has been found that the optical transfer function of the system equals the Fourier transform of the intensity transmissivity of the projecting circular grating, and the point spread function of the system equals to a (delta) function. Also given in this paper are the principles of the CG optical scanning holography and the computer simulations.
Liang Wanguo
Xie Jinghui
Zhao Dazun
Zhao Yeling
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