| 摘要 |
PROBLEM TO BE SOLVED: To provide a rod lens and an optical component which have anα-power refractive index distribution with small fluctuations of the refractive index in a refractive index distribution, small loss, and superior light convergence characteristics. SOLUTION: This rod lens consists principally of quartz glass which contains one of fluorine and diboron trioxide and diphosphorus pentoxide, or contains diphosphorus pentoxide together with fluorine and diboron trioxide. The concentration of fluorine and diboron trioxide gradually increase radially outward from the center axis of the rod lens to give theα-power refractive index such that the refractive index distribution of the rod lens decreases radially outward from the center axis. The rod lens is obtained by making glass raw material gas flow in a quartz pipe while rotating the quartz pipe on its axis, producing glass by heating the raw material gas to deposit the glass on the inner wall of the quartz pipe, and then heating the quartz pipe in which glass particulates are deposited to make the pipe solid. COPYRIGHT: (C)2004,JPO
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