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...

2007-05-15

2007-05-15

Sample, David (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S059000, C501S061000, C501S062000, C501S065000, C501S066000, C501S067000, C501S068000, C501S069000, C501S070000, C501S900000

Reexamination Certificate

active

10666299

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 0.43W, 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: 3954487 (1976-05-01), Gliemeroth et al.
patent: 3970466 (1976-07-01), Faulstich
patent: 4418985 (1983-12-01), Kasori et al.
patent: 4768859 (1988-09-01), Kasori et al.
patent: 4920082 (1990-04-01), Danielson
patent: 5735920 (1998-04-01), Omori et al.
patent: 5744409 (1998-04-01), Hashimoto et al.
patent: 5919718 (1999-07-01), Hirota et al.
patent: 19828992 (1999-10-01), None
patent: WO98/30507 (1998-07-01), None

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