Converging light transmitting body of high performance and proce

Details Converging light transmitting body of high performance and proce Converging light transmitting body of high performance and proce

1981-08-07

1984-07-31

Corbin, John K.

350 9631, C03C 308, G02B 514

Patent

active

044626630

ABSTRACT:
The present invention provides a converging light transmitting glass body whose refractive index gradually changes from its central portion to its surface in a direction transverse to a path of light, said glass body containing at least three cations constituting modifying oxides of the glass, a first and a second cation among said cations showing concentration changes of converse gradients from its central portion toward its peripheral surface, and a third cation showing no substantial concentration change at the central portion of the glass body but showing a substantial continuous concentration charge outwardly thereof toward its peripheral surface.
The present invention also provides a process for producing the light transmitting glass body which comprises contacting a glass body containing a modifying oxide of a first cation with an ion source containing the second cation to produce a pre-produced glass body, and then contacting the pre-produced glass body with an ion source containing the third cation, or which comprises contacting a glass body containing a modifying oxide of a first cation with an ion source containing a second cation and a third cation.
The converting light transmitting glass body of the present invention has an ideal refractive index distribution.

REFERENCES:
patent: 3647406 (1972-03-01), Fisher
patent: 3859103 (1975-01-01), Yoshiyagawa et al.
patent: 3941474 (1976-03-01), Kitano et al.

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