Polycrystalline zinc sulfide and zinc selenide articles having i

Details Polycrystalline zinc sulfide and zinc selenide articles having i Polycrystalline zinc sulfide and zinc selenide articles having i

1990-04-27

1992-06-30

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Optical fiber, waveguide, or preform

264 62, 264 65, 264 85, 264570, C04B 3564

Patent

active

051260816

ABSTRACT:
Articles of polycrystalline zinc sulfide and zinc selenide achieve substantially improved optical quality by a treatment of heat and isostatic pressure by means of an inert working fluid. The treated specimens are transparent and have substantial transmission in the infrared and visible range of the spectrum. Additional improvement in the transmission characteristics is achieved by wrapping the specimens in a foil of an inert material prior to treatment.

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