Glass manufacturing – Processes – With chemically reactive treatment of glass preform
Patent
1988-08-04
1990-02-20
Schor, Kenneth M.
Glass manufacturing
Processes
With chemically reactive treatment of glass preform
65 314, 350417, C03C 2100
Patent
active
049023306
ABSTRACT:
A method of producing a gradient-index lens includes a first step in which a glass body is immersed into a molten salt containing ions which are able to provide a refractive index higher than that of ions constituting the glass body, in order to perform ion diffusion into the glass body. Thereafter, in a second step the glass body obtained from the first step is immersed into a molten salt containing ions which provide a refractive index lower than that of the ions of the molten salt used in the first step. In this way there is formed a predetermined refractive index distribution in the glass body.
REFERENCES:
patent: 3888648 (1975-06-01), West et al.
patent: 3941474 (1976-03-01), Kitano et al.
French et al., Ceramic Bulletin, Nov. 1970, pp. 974-977, vol. 49, No. 11.
Giallorenzi et al., Applied Optics, vol. 12, No. 6, Jun. 1973, pp. 1240-1245.
Pearson et al., Applied Physics Letters, vol. 15, No. 2, Jul. 15, 1969, pp. 76-77.
Kitano et al., Proceedings of First Conference on Solid State Devices, Tokyo 1969, Supplement to J. Japan Society of Applied Physics, vol. 39, 1970, pp. 63-70.
Asahara Yoshiyuki
Nakayama Shin
Omi Shigeaki
Sakai Hiroyuki
Yoneda Yoshitaka
Hoya Corporation
Schor Kenneth M.
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