Ray optics is used to analyze the image-transfer properties of interferometrically prepared fiber-optics structures. A previously demonstrated image-transfer plate formed by a crossed pair of sinusoidal-refractive-index gratings is analyzed to lowest order in index variations. Results include ray-guiding criteria, trajectories and their oscillation periods, the efficiency of image transfer, and an over-all picture of image formation and the effects of unguided light on fidelity and contrast. A model of a high-resolution array of discrete fibers is analyzed for comparison. The crossed-sinusoid structure is found to be more efficient under narrow-angle illumination. Adaptation of the fiber model as a limiting interferometric index profile yields a general idea of the range of image-transfer capabilities of interferometric structures and an assessment of the effects of large index variations.
© 1972 Optical Society of AmericaFull Article | PDF Article
OSA Recommended Articles
D. L. Portigal and E. Burstein
J. Opt. Soc. Am. 62(7) 859-864 (1972)
P. J. Sands
J. Opt. Soc. Am. 62(10) 1211-1220 (1972)
J. Opt. Soc. Am. 62(11) 1325-1328 (1972)