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Patent Abstracts of Japan vol. 9, No. 101 (P-353) 1824!, May 2, 1985 & JP 59 226832 A (Yokogawa Hokushin Denki K.K.), Dec. 20, 1984 see abstract. |
S.H. Song, E.H. Lee: “Planar optical configurations for crossover interconnects” Optics Letters, vol. 20, No. 6, Mar. 15, 1995, pp. 617-617-619, XP000493641 New York, NY, US see page 617, paragraph 2—p. 618, paragraph 2; figure 1A, 1B. |