Surface reflecting mirror having a silicon dioxide under layer

Details Surface reflecting mirror having a silicon dioxide under layer Surface reflecting mirror having a silicon dioxide under layer

1992-10-29

1995-06-13

Ben, Loha

Optical: systems and elements

Mirror

With selective absorption or transparent overcoating

359883, 359584, 359585, 428688, 428698, 4274192, 4274197, G02B 522, G02B 526, B32B 900, B05D 136

Patent

active

054248760

ABSTRACT:
A high-reflectivity surface reflecting mirror is provided by sequentially forming, on a resin substrate, a silicon dioxide first under layer, a chromium sulfide second under layer, a silver reflecting layer and protective layers. According to a second aspect of the invention, a surface reflecting mirror is provided by sequentially forming, on a resin substrate, a silicon dioxide under layer, an aluminum reflecting layer, a silicon dioxide first protective layer, a second protective layer made of at least one of titanium oxide, tantalum oxide and zirconiumoxide, and an aluminum oxide third protective layer.

REFERENCES:
patent: 4451119 (1984-05-01), Meyers et al.
patent: 4482209 (1984-11-01), Grewal et al.
patent: 4548691 (1985-10-01), Dietrich et al.
patent: 4944581 (1990-07-01), Ichikawa
patent: 4979802 (1990-12-01), Ichikawa
patent: 5019458 (1991-05-01), Elgat et al.
patent: 5216551 (1993-06-01), Fujii
"Reflectance and Durability of Ag Mirrors Coated With Thin Layers of Al.sub.2 O.sub.3 Plus Reactively Deposited Silicon Oxide", G. Hass et al, Applied Optics, vol. 14, No. 11, Nov. 1975, pp. 2639-2644.
"Progress in the Development of a Durable Silver-Based High-Reflectance Coating for Astronomical Telescopes", Dar-Yuan Song et al, Applied Optics, vol. 24, No. 8, Apr. 1985 pp. 1164-1170.
British Search Report GB 9222448.4 dated Nov. 29, 1993.
Japanese Patent Abstract 60-131501 dated Jul. 13, 1985.
Japanese Patent Abstract 56161503 dated Dec. 11, 1981.

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