EP0744634A2
Expired / Lapsed
EP
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Polarizer and production method thereof
Assignee: Kyocera Corp
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Filing: 1996-05-23
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Granted: —
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Expires: 2016-05-23
Abstract
Abstract A metal such as Au and a dielectric such as borosilicate glass are simultaneously sputtered to form a film on a glass substrate. Next, this film is heated to grow metal particulates. Next, the substrate is drawn on heating to give an anisotropy to the metal particulates and produce a polarizer. The metal particulates are spheroidal and are dispersed almost homogeneously in the dielectric.
Inventors
- 👤 Toru Fukano
- 👤 Yasushi Sato
- 👤 Masato Shinya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:33
CPC Classifications
C; C03; C03C; C03C14/00; C03C14/006; C03C17/00; C03C17/006; C03C17/007; G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3058; C03C2214/00; C03C2214/08; C03C2217/00; C03C2217/40; C03C2217/43; C03C2217/44; C03C2217/45; C03C2217/452; C03C2217/46; C03C2217/47; C03C2217/475; C03C2217/479; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10S372/00; Y10S372/703
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
32 words
A polarizer wherein on at least one main face of a transparent dielectric substrate is formed a polarizing layer wherein metal particulates having an anisotropy are dispersed virtually homogeneously in a dielectric.
Claim 2
Dependent Claim
22 words
A polarizer of Claim 1 being characterized by both said dielectric substrate and said dielectric in said polarizing layer being borosilicate glass.
Claim 3
Dependent Claim
30 words
A polarizer of Claim 1 being characterized by said metal particulates being at least one member material of a group consisting of precious metals and Cu, Fe, Ni and Cr.
Claim 4
Dependent Claim
22 words
A polarizer of Claim 1 being characterized by said metal particulates having an aspect ratio ranging from 10 to 30 in average.
Claim 5
Dependent Claim
33 words
A polarizer of Claim 4 being characterized by said metal particulates having a mean major axis length of 10 to 300 nm and a mean minor axis length of 1 to 10 nm.
Claim 6
Dependent Claim
23 words
A polarizer of Claim 5 being characterized in that said polarizing layer has a metal particulate content of 5 to 15 volume percent.
Claim 7
Dependent Claim
27 words
A polarizer of Claim 1 being characterized by said metal particulates being at least one member material of a group consisting of Au, Cu and their alloys.
Claim 8
Dependent Claim
65 words
A production method of a polarizer comprising forming a thin film of a mixture of a dielectric and a metal on at least one main face of a transparent dielectric substrate, then heating said thin film to coagulate the metal in the thin film and form metal particulates, then drawing said substrate and said thin film on heating to stretch said metal particulates into spheroids.
Claim 9
Dependent Claim
23 words
A production method of a polarizer of Claim 8 being characterized by only one single layer of said mixture thin film being formed.
Claim 10
Dependent Claim
17 words
An optical isolator having a polarizer of Claim 1, a Farady rotator, a magnet and a holder.
Claim 11
Dependent Claim
94 words
A production method of a polarizer comprising repeating the following steps A, B and C plural times in this order on at least one main face of a transparent dielectric substrate, then taking the following step D: A: a step of forming a metal thin film; B: a step of heating said metal thin film to change it into discontinuous insular metal particulates; C: a step of forming a dielectric thin film over said metal particulates; and D: a step of drawing said dielectric substrate on heating to change said metal particulates into spheroids.
Claim 12
Dependent Claim
47 words
A production method of a polarizer of Claim 11 being characterized by said dielectric substrate being made of borosilicate glass, said metal thin film being made by sputtering in said step A, and said dielectric thin film being made by sputtering borosilicate glass in said step C.
References Cited (Backward Citations)
No citation records indexed.
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