Mirror for high-intensity ultraviolet light beam

Details Mirror for high-intensity ultraviolet light beam Mirror for high-intensity ultraviolet light beam

1997-03-27

1998-12-15

Henry, Jon W.

Optical: systems and elements

Having significant infrared or ultraviolet property

Multilayer filter or multilayer reflector

359584, 359585, 359589, 372 99, G02B 528, G02B 100, H01S 308, F21V 906

Patent

active

058503099

ABSTRACT:
A mirror for, e.g, an excimer laser is disclosed having high reflectance for a broad band of wavelengths in the ultraviolet range exhibiting excellent adhesion and "laser durability." The mirror comprises a substrate formed from glass or a glass-like material, a dielectric film, and a metallic film, such as aluminum foil, positioned between the dielectric film and the substrate. The dielectric film includes alternating layers of high- and low-refractive index material. These alternating layers reduce the amount of incident light reaching the metallic film so that any damage to the metallic film caused by light is reduced, thereby increasing the laser durability of the mirror. The laser durability is also increased because the durability of the laminated dielectric film is generally superior to that of the metallic film used in prior-art metallic reflector mirrors.

REFERENCES:
patent: 4714308 (1987-12-01), Sawamura et al.
patent: 4856019 (1989-08-01), Miyata et al.
patent: 5424876 (1995-06-01), Fujii
patent: 5506037 (1996-04-01), Tremath

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