| 摘要 |
PROBLEM TO BE SOLVED: To provide a molded article of an optical polymer which can fully restrain the variation of the rate of change in refractive index by moisture absorption. SOLUTION: An optical polymer molded article of a methacrylic resin composition is provided, whose rate of change in refractive index is≤0.25% and whose rate of change in mass is≥0.65%, and an optical polymer molded article of a polycarbonate resin composition is provided, whose rate of change in refractive index is≤0.06% and whose rate of change in mass is≥0.17%. By letting the refractive index of the optical polymer molded article in a dry condition be indicated by (n), the mass by (w), the refractive index of the optical polymer molded article in a moisture absorption condition by (n'), and the mass by (w'), the above rate of change in refractive index and rate of change in mass are expressed by [(n'-n)/n]×100 (%) and [(w'-w)/w]×100 (%), respectively. COPYRIGHT: (C)2005,JPO&NCIPI
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