Optical glass suffering little change in refractive index by...

Details Optical glass suffering little change in refractive index by... Optical glass suffering little change in refractive index by...

2008-05-13

2008-05-13

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S045000, C501S046000, C501S048000

Reexamination Certificate

active

10666232

ABSTRACT:
An optical glass wherein an amount of change in refractive index (Δn: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43 W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.

REFERENCES:
patent: 3671276 (1972-06-01), Bromer et al.
patent: 4358543 (1982-11-01), Nozawa
patent: 4808556 (1989-02-01), Sawanobori et al.
patent: 4915721 (1990-04-01), Broemer et al.
patent: 4990468 (1991-02-01), Komiya et al.
patent: 5017520 (1991-05-01), Otsuka et al.

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