Method of making ommateal lenses and plates

Details Method of making ommateal lenses and plates Method of making ommateal lenses and plates

1979-04-23

1980-11-04

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 3A, 65 4B, 65 31, 350 9631, C03C 1500, C03C 2506

Patent

active

042317754

ABSTRACT:
Columnar lens elements of a crossed multi-ocular array are each formed of a rectangular preform of core glass containing a modifying oxide which is clad on each of two of its opposite sides with a glass having an affinity to ions of the modifying oxide and on remaining sides with a substantially non-reactive glass, all cladding glasses being preferentially soluble relative to the core glass. The clad preform is heated and drawn to the cross-sectional size desired of the aforesaid lens elements and cut transaxially into component lengths equal to or greater than desired for the array. A multiplicity of the cut components are tightly juxtapositioned, heated for diffusion of oxide ions into the first mentioned cladding glasses, cooled, annealed and leached free of all claddings for final crossed assembly.

REFERENCES:
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patent: 3667832 (1972-06-01), Kitano et al.
patent: 3791806 (1974-02-01), Koizumi et al.
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patent: 3843228 (1974-10-01), Yoshiyagawa et al.
patent: 3879182 (1975-04-01), Strack
patent: 3941474 (1976-03-01), Kitano et al.
patent: 3989495 (1976-11-01), Siegmund
patent: 4002452 (1977-01-01), Hopkins
patent: 4011071 (1977-03-01), Siegmund

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