Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...
Patent
1976-02-19
1977-12-06
Bashore, S. Leon
Glass manufacturing
Processes
With shaping of particulate material and subsequent fusing...
65 22, 65 30R, 65 31, 65 60D, 65DIG7, 156663, C03B 2320, C03C 1500
Patent
active
040614867
ABSTRACT:
The invention provides a process for producing a transparent optical-glass body having a linear index of refraction gradient. Particles of optical glass which contain leachble ingredients are pressed to form a self-supporting porous optical glass body. Some of the leachable ingredient is leached from a part of the porous glass, and a different amount is leached from a second part of the porous glass, the index of refraction varying in proportion to the different amounts leached from the glass body. The porous optical glass body is heated to eliminate the pores. Various means for effecting the different amounts of leaching over the length of the glass body are shown.
REFERENCES:
patent: 3149946 (1964-09-01), Elmer
patent: 3485687 (1969-12-01), Chapman
patent: 3647583 (1972-03-01), De Rouw
patent: 3785793 (1974-01-01), Park
patent: 3792987 (1974-02-01), Eaton
patent: 3873344 (1975-03-01), Church et al.
patent: 3938974 (1976-02-01), Macedu et al.
Bashore S. Leon
Jenaer Glaswerk Schott & Gen.
Miga Frank W.
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