Although holographic image reconstruction has been applied prin-cipally at optical wavelengths, such reconstruction is also of in-terest in the radar microwave regime, in which recognition of an object from the characteristics of scattered radiation is a classical problem. The application of holography to centimeter wavelength radiation directs attention to certain problem areas that need not be of such importance in the optical case. In particular, the large aperture needed to obtain reasonable resolution at centimeter wave-lengths requires that the hologram function be sampled at discrete points rather than recorded on a continuum. Further, the thermal noise introduced by the microwave receivers used to sample the hologram introduces a noise background in the reconstructed image. The use of sampling requirements determined, and calculations have been made of the effect of receiver noise in producing image background noise.

Date Published: 1 January 1968
PDF: 2 pages
Proc. SPIE 0015, Holography I, (1 January 1968); doi: 10.1117/12.946789

Published in SPIE Proceedings Vol. 0015:
Holography I
Bernard G. Ponseggi; Brian J. Thompson, Editor(s)