Optical filters

Details Optical filters Optical filters

1976-08-09

1978-08-15

Sebastian, Leland A.

Compositions

Radioactive compositions

Nuclear reactor fuel

252300, G02B 522

Patent

active

041068572

ABSTRACT:
Rare earth elements with partially filled 4f electron shells are used to form a class of absorption type band pass optical filters. The rare earth elements are advantageously incorporated in glass at concentrations with the rare earth atoms constituting upwards of 15% of all the metallic atoms. Filters with pass bands less than 5% of the center wavelength are realized.

REFERENCES:
patent: 2805166 (1957-09-01), Loffler
patent: 3022181 (1962-02-01), Connelly
patent: 3052153 (1962-09-01), Powell
patent: 3126295 (1964-03-01), Young
Savitskii, S. E., et al., "Use of Some Rare Earth Elements for Obtaining Light Filters with Preassigned Optical Characteristics" Chemical Abstracts, vol. 76 (1972) Abstract No. 75904a.
Starostina, G. P. et al., "Silica Light Filters, Doped with Eu, Yb and Sm", Optical Technology, vol. 41, No. 1, (Jan. 1974) pp. 39-42.

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