A thin-film lenslike light guide was made by rf sputtering of one glass film on another glass substrate. The one-dimensional focusing properties which depend upon the propagating mode are to be demonstrated. A basic theoretical treatment is given which shows that the focusing power increases with the mode number. The focusing parameters were determined experimentally. The over-all experimental results were in good agreement with the theoretical predictions.
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Suematsu et al. (1973) studied this question.
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