发明名称 |
Method of producing a glass article having a graded refractive index profile of a parabolic nature |
摘要 |
A method of producing a glass article having a graded refractive index profile of a parabolic nature is disclosed. The method comprises soaking a preform having a porous matrix with interconnected pores into a stuffing solution containing at least one index modifying dopant of predetermined solubility in the stuffing solution for a time interval to fill the pores with the dopant solution, precipitating the dopant into the porous matrix approximately uniformly throughout, soaking the preform into a solvent solution having a solubility for the dopant lower than the solubility of the dopant in the stuffing solution for a time interval sufficient to cause substantially all of the dopant to redissolve and for diffusion to take place out of the porous matrix in such a way that the dopant concentration decreases as a function of radial distance from the central axis, precipitating the dopant in the porous matrix by reducing the temperature of the preform to a level such that the dopant is precipitated out of solution, removing the solvent and where necessary decomposition products from the preform, and heating to consolidate the preform to produce a glass article having a graded refractive index profile of the parabolic nature.
|
申请公布号 |
US4302231(A) |
申请公布日期 |
1981.11.24 |
申请号 |
US19790007192 |
申请日期 |
1979.01.29 |
申请人 |
DE MACEDO, PEDRO MANOEL BUARQUE |
发明人 |
MACEDO, PEDRO B.;SIMMONS, JOSEPH H.;MURAI, SHIGEO |
分类号 |
G02B6/00;C03B37/00;C03B37/014;C03B37/016;C03C23/00;G02B6/02;(IPC1-7):C03B37/02;C03B37/07;C03C21/00 |
主分类号 |
G02B6/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|