| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical transmission member with small unevenness of light intensity and having a sufficient light intensity value. SOLUTION: The method for manufacturing the optical transmission member the refractive index of which continuously decreases from the center toward the outside of the radial direction within a range where the distance from the center to the radial direction is 0-R (0.93r<SB>0</SB>≤R<r<SB>0</SB>) and the refractive index continuously rises from the center toward the outside of the radial direction within a range where the distance is R-r<SB>0</SB>is provided by forming a fiber-like unhardened object layered product whose refractive index sequentially decreases from the center part toward a periphery by stacking N unhardened objects in which a refractive index of a hardened product to be obtained after hardening is n<SB>1</SB>-n<SB>N</SB>(N≥3) like concentric circles, performing volatilization processing for volatilizing relatively many components with low refractive index from the maximum periphery layer while performing mutual diffusion processing of components between the adjacent layers so that refractive index distribution between each layer of the layered product continuously changes or after performing the mutual diffusion processing, performing hardening processing of the layered product. COPYRIGHT: (C)2006,JPO&NCIPI |
