Patent ID: 6335094
Filing Date: 2002-01-01
Classification: D01F,Y10T

Abstract:
A fiber structure with a cross section having x-axis and y-axis directions, comprising:an alternate lamination including: a first portion having a refractive index na and a thickness da; and a second portion adjacent to said first portion, said second portion having a refractive index nb and a thickness db, wherein when 1.0&lE;na<1.8, 1.3&lE;nb&lE;1.8, and 1.03&lE;nb/na&lE;1.05, a primary peak wavelength &lgr;1 which is equal to 2(nada+nbdb) is given by &lgr;1&gE;0.78 (&mgr;m), which is included in a region of wavelength of infrared rays.