Optical: systems and elements – Light interference – Produced by coating or lamina
Patent
1992-01-28
1993-06-08
Lerner, Martin
Optical: systems and elements
Light interference
Produced by coating or lamina
359585, 427162, 428550, G02B 528
Patent
active
052184722
ABSTRACT:
Optical interference structures incorporating porous films are disclosed. These structures are capable of exhibiting a color by interference effects caused by the interference of light reflected from various layers within the structure. Basically, the structures comprise a reflective substrate, a porous transparent dielectric film on the substrate and at least one semi-transparent layer supported by the porous dielectric film. The structure is such that there are at least two reflective surfaces separated by an optically thin porous layer of the dielectric film. These structures can be formed by several methods, but the most convenient involves the porous anodization of a substrate metal (e.g. aluminum) to form the dielectric film and the deposition of a semi-transparent metal layer within the pores or on the film surface. The structures can be made inexpensively and are capable of generating strong and, if desired, dichroic colors. The porous nature of the film can also be exploited to create color shifts. The structures can be used for decorative purposes or to create a wide range of indicators, sensors, security devices and the like.
REFERENCES:
patent: 3811752 (1974-05-01), Jaklevic et al.
patent: 4115212 (1978-09-01), Patrie et al.
patent: 4126582 (1978-11-01), Diem et al.
patent: 4310586 (1982-01-01), Sheasby et al.
patent: 4431707 (1984-02-01), Burns et al.
patent: 4472533 (1984-09-01), Moskovits et al.
Pastore et al.--Thin Solid Films, 173 (1989) 299-308 General Film Behaviour--"Electrocolouring of Anodized Aluminum. . . ".
Mizuki; et al--Metal Surface Technology 38, (12) 1987 pp. 561-563--translation "Electrochemical Incorporation . . .".
Thomas--"Optical coatings by the sol-gel process" Optics News--Aug. 1986, pp. 18 to 22.
Jozefowicz Mark A.
Rosenfeld Aron M.
Alcan International Limited
Lerner Martin
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