Abstract

A method of spatial filtering which allows one to obtain optical cross sections of a three-dimensional object is demonstrated. The essence of the method is to photograph the object, which is illuminated by a fine pattern of light, with a camera of limited depth of field. The fine pattern appears in focus on the photographic negative of a selected cross section of the object while the foreground and background parts of the object are blurred. The photographic transparency is then placed in a standard spatial filtering setup, and the desired cross section thus obtained. The optical sectioning technique for generating three-dimensional images will then be compared according to information density with holographic and fly’s eye lenslet methods.

© 1971 Optical Society of America

Lensless Holographic Recognition of Spatially Incoherent Patterns in Real Time

W. T. Maloney
Appl. Opt. 10(9) 2127-2131 (1971)

Scanning Halftone Plotter and Computer-Generated Continuous-Tone Hologram

Y. Ichioka, M. Izumi, and T. Suzuki
Appl. Opt. 10(2) 403-411 (1971)

Spatial Pulse Modulation

A. W. Lohmann and H. W. Werlich
Appl. Opt. 10(12) 2743-2753 (1971)

Moiré Contour-Sum Contour-Difference, and Vibration Analysis of Arbitrary Objects

J. Der Hovanesian and Y. Y. Hung
Appl. Opt. 10(12) 2734-2738 (1971)

Space Bandwidth Requirements for Three-Dimensional Imagery

E. N. Leith
Appl. Opt. 10(11) 2419-2422 (1971)