Optical filter for neodymium laser light

Details Optical filter for neodymium laser light Optical filter for neodymium laser light

1974-08-01

1976-05-25

Padgett, Benjamin R.

Compositions

Inorganic luminescent compositions

Tungsten containing

106 47R, 106 54, 428428, G02B 522

Patent

active

039591719

ABSTRACT:
An optical filter includes glass doped with erbium (Er.sup.3.sup.+) ions for absorbing light at about 530 nm for protection against frequency doubled Nd-laser light; and to provide protection against Nd-laser light, ferrous (Fe.sup.2.sup.+) ions are included in the glass. The glass base may be changed to broaden the absorption band, increase the absorption coefficient, or to shift the absorption band towards longer wavelengths.

REFERENCES:
patent: 2805166 (1957-09-01), Loffler
patent: 3081178 (1963-03-01), Weissenberg et al.
patent: 3703388 (1972-11-01), Araujo et al.
patent: 3726698 (1973-04-01), Hares et al.

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