Attenuating filter for ultraviolet light

Details Attenuating filter for ultraviolet light Attenuating filter for ultraviolet light

2007-03-27

2007-03-27

Dunn, Drew A. (Department: 2872)

Optical: systems and elements

Having significant infrared or ultraviolet property

Having ultraviolet absorbing or shielding property

C359S350000, C359S358000, C359S359000, C359S360000

Reexamination Certificate

active

10998050

ABSTRACT:
An attenuating filter provides a prescribed attenuation of the intensity of transmitted, short-wavelength, ultraviolet light, in particular, at wavelengths below 200 nm, that is governed by a predefinable spatial distribution of its spectral transmittance. The filter has a transparent substrate (3), e.g. fabricated from crystalline calcium fluoride. A filter coating (5) fabricated from a dielectric material that absorbs over a predefined wavelength range is applied to at least one surface (4) of the substrate. In the case of operating wavelengths of about 193 nm, the filter coating consists largely of tantalum pentoxide. Filters of the type, which may be inexpensively fabricated with high yields, are noted for their high abilities to withstand laser radiation and may be effectively antireflection coated employing simply designed antireflection coatings.

REFERENCES:
patent: 2675740 (1954-04-01), Barkley
patent: 4372987 (1983-02-01), Ganner et al.
patent: 4975328 (1990-12-01), Hirose
patent: 5144498 (1992-09-01), Vincent
patent: 5181141 (1993-01-01), Sato et al.
patent: 5201926 (1993-04-01), Szczyrbowski et al.
patent: 5275916 (1994-01-01), Kato
patent: 5380558 (1995-01-01), Fujino
patent: 5493442 (1996-02-01), Buchholz et al.
patent: 5591529 (1997-01-01), Braatz et al.
patent: 5694240 (1997-12-01), Sternbergh
patent: 6387517 (2002-05-01), Belleville et al.
patent: 6574039 (2003-06-01), Murata et al.
patent: 2001/0008540 (2001-07-01), Oba et al.
patent: 2002/0176183 (2002-11-01), Erz et al.
patent: 975 553 (1962-01-01), None
patent: 1 157 002 (1963-11-01), None
patent: 3832111 (1989-04-01), None
patent: 42 10 079 (1992-10-01), None
patent: 44 10 275 (1994-10-01), None
patent: 1178707 (1970-01-01), None
patent: 2 161 953 (1986-01-01), None
patent: 63-243726 (1988-10-01), None
patent: 07020312 (1995-01-01), None
patent: 07020312 (1995-01-01), None

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