略語大辞典 [Opt] 31 LB low-birefringent (fiber) 低複屈折(ファイバー). ビート長が1m以上の光ファイバー.low-birefringent (fiber); has a beat length above 1 m; ref. an HB(high-birefringent) fiber has a beat length lies between 1 mm and 10 cm; [Opt:L]. 丸善「略語大辞典」JLogosID : 11880279