Patent
1988-08-11
1989-09-19
Arnold, Bruce Y.
350 14, G02B 100
Patent
active
048675440
ABSTRACT:
Optical glass elements with graded refraction index in the infra red region. The elements are made of doped oxygen free chalcogenide glass. The concentration of the dopant decreases from the periphery inward. Typical examples of dopants are As, S and Se.
The glass elements are prepared by exposing an oxygen free chalcogenide glass to a molten chemical element or salt at about 150.degree.-400.degree. C. in an oxygen free atmosphere.
REFERENCES:
patent: 4371232 (1983-02-01), Jensen et al.
Bornstein Aharon
Tsalach Tsadok
Arnold Bruce Y.
Gass Rebecca D.
The State of Israel, Atomic Energy Commission, Soreq Nuclear Res
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