Fiber structure, cloths using same, and textile goods

Abstract

A fiber structure with a cross section having x-axis and y-axis directions includes an alternate lamination including a first portion having a refractive index na and a thickness da and a second portion adjacent to the first portion and having a refractive index nb and a thickness db, wherein when 1.0≦na<1.8, 1.3≦nb≦1.8, and 1.01≦nb/na≦1.80, a primary peak wavelength λ1 which is equal to 2(nada+nbdb) is given by λ1≧0.78 or 1.6 (μm).

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