Method of making infrared crystalline fiber

Details Method of making infrared crystalline fiber Method of making infrared crystalline fiber

1993-02-04

1994-08-30

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Nonresinous material only

264 129, B29D 1100

Patent

active

053420225

ABSTRACT:
A method of making silver halide fibers involves reducing turbulence and friction during extrusion by moving an extrusion die in a direction opposite from flowing fiber and against a stationary preform arrangement. In another embodiment, the preform is doped with AgI or is a metal compound of the formula MY wherein M is selected from Li, Na, K, Rb, Cs; or MY.sub.2 wherein M is selected from Mg, Ca, Sr, Pb, Ba, Cd or Hg, and Y is selected from Cl, Br, or I. The resulting fiber has a more even core/clad interface with decrease in grain size to fiber surface and texture elongated along the fiber axis. This structure together with strengthening and stabilizing dopants, added to fiber material, gives decreased and stabilized optical losses and a higher elasticity of fibers.

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patent: 4381141 (1984-04-01), Sakaragel et al.
patent: 4504298 (1985-03-01), Yokota et al.
patent: 4552434 (1985-11-01), Murakami et al.
patent: 5182790 (1993-01-01), Kayashima et al.

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