Optical: systems and elements – Light interference – Produced by coating or lamina
Patent
1997-02-10
1998-04-28
Henry, Jon W.
Optical: systems and elements
Light interference
Produced by coating or lamina
359584, 359884, G02B 508, G02B 528
Patent
active
057452911
ABSTRACT:
A method of producing mirrors comprising depositing onto a ribbon of hot glass during the production process a coating comprising a reflecting layer and at least two reflection enhancing layers whereby the mirrors have a visible light reflection of at least 70%. There is also provided a mirror having such a coating. In a preferred embodiment the coating comprises: an inner layer having a refractive index of at least 1.6; an intermediate layer of relatively low refractive index and; an outer layer having a refractive index of at least 1.6; the intermediate layer having a refractive index less than the refractive index of either said inner layer or said outer layer and less than 3, provided that at least one of said inner and outer layers is of silicon, the aggregate refractive index of the inner and outer layers is at least 5.5, and the thicknesses of the layers are such that the mirror has a visible light reflection of at least 70%. In an alternative embodiment, one of the inner and outer layers may instead be composed of a low refractive index reflective metal.
REFERENCES:
patent: 2519722 (1950-08-01), Turner
patent: 4019887 (1977-04-01), Kirkbride et al.
patent: 4188444 (1980-02-01), Landau
patent: 4312570 (1982-01-01), Southwell
patent: 4419386 (1983-12-01), Gordon
patent: 4661381 (1987-04-01), Callies et al.
patent: 4673248 (1987-06-01), Taguchi et al.
patent: 4847157 (1989-07-01), Goodman et al.
patent: 4919778 (1990-04-01), Dietrich et al.
patent: 5143445 (1992-09-01), Bateman et al.
patent: 5168003 (1992-12-01), Proscie
patent: 5300174 (1994-04-01), Leach et al.
patent: 5535056 (1996-07-01), Caskey et al.
J. Stone and L.W. Stulz: Reflectance, transmittance, and loss spectra of multilayer Si/SiO.sub.2 thin film mirrors and antireflection coatings for 1.5 m (Applied Optics, 1 Feb. 1990, vol. 29, No. 4, pp. 583-588).
P.J. Martin et al: Optical Properties of Thin Amorphous Silicon and Amorphous Hydrogenated Silicon Films Produced by Ion Beam Techniques (Thin Solid Films, 100 91983) pp. 141-147, Electronics and Optics).
Cartwright et al: Multilayer Films of High Reflecting Power, 1939, p. 28.
Asahi Glass Co.: Chemical Abstracts, vol. 110, No. 6, Feb. 6, 1989, Columbus, Ohio,; Abstract No. 42057, p. 187 (JP 63195149, Aug. 12, 1988).
Asaka Glass Sangyo--(Abstract) Derwent Publications, Ltd., AN 88-039167 and JP 62297242, Dec. 24, 1987.
Henry Jon W.
Pilkington Glass Limited
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