EP0090558A1
Expired / Lapsed
EP
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Optical element and optical resin composition for the preparation thereof
Assignee: Konica Minolta Inc
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Filing: 1983-03-17
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Granted: —
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Expires: 2003-03-17
Abstract
Abstract An optical element prepared by an injection molding, a compression molding or the like, comprises an optical resin composition consisting essentially of a polymer selected from the group consisting of a copolymer of a cyclohexyl methacrylate with at least one other a methyl methacrylate and a copolymer of a methylcyclohexyl methacrylate with at least one other ethyl methacrylate, the element having invariable surface evenness, high resistibility against heat and impact, low birefringence and the like as its native characteristics.
Inventors
- 👤 Sota Kawakami
- 👤 Satoshi Matsunaga
- 👤 Hideki Murata
- 👤 Toshihiko Kiriki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:44
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
47 words
An optical element comprizing an optical resin composition consisting essentially of a polymer selected from the group consisting of a copolymer of a cyclohexyl methacrylate with at least one other a methyl methacrylate and a copolymer of a methylcyclohexyl methacrylate with at least one other methyl methacrylate.
Claim 2
Dependent Claim
47 words
An optical element comprizing an optical resin composition consisting essentially of a polymer selected from the group consisting of a copolymer of a cyclohexyl methacrylate with at least one other a methyl methacrylate and a copolymer of a methylcyclohexyl methacrylate with at least one other methyl methacrylate.
Claim 3
Dependent Claim
20 words
An optical element according to Claim 1, wherein said polymer includes 10 % by weight or more of methyl methacrylate.
Claim 4
Dependent Claim
20 words
An optical element according to Claim 2, wherein said polymer includes 90 % by weight or less of methyl methacrylate.
Claim 5
Dependent Claim
15 words
An optical element according to Claim 1, wherein said methylcyclohexyl methacrylate is a monomethylcyclohexyl methacrylate.
Claim 6
Dependent Claim
26 words
An optical element according to Claim 3, wherein the copolymerization ratio of said cyclohexyl methacrylate/methyl methacrylate or said methylcyclohexyl methacrylate/methyl methacrylate ranges from 40/60 to 60/40.
Claim 7
Dependent Claim
32 words
An optical element according to Claim 1, wherein said copolymers are a copolymer of a cyclohexyl methacrylate with a methyl methacrylate and a copolymer of a methylcyclohexyl methacrylate with a methyl methacrylate.
Claim 8
Dependent Claim
42 words
An optical resin composition consisting essentially of a polymer selected from the group consisting of a copolymer of a cyclohexyl methacrylate with at least one other methyl methacrylate and a copolymer of a methylcyclohexyl methacrylate with at least one other methyl methacrylate.
Claim 9
Dependent Claim
42 words
An optical resin composition consisting essentially of a polymer selected from the group consisting of a copolymer of a cyclohexyl methacrylate with at least one other methyl methacrylate and a copolymer of a methylcyclohexyl methacrylate with at least one other methyl methacrylate.
Claim 10
Dependent Claim
23 words
An optica ' l resin composition according to Claim 7, wherein said polymer includes 10 % by weight or more of methyl methacrylate.
Claim 11
Dependent Claim
21 words
An optical resin composition according to Claim 8, wherein said polymer includes 90 % by weight or less of methyl methacrylate.
Claim 12
Dependent Claim
16 words
An optical resin composition according to Claim 7, wherein said methylcyclohexyl methacrylate is a monomethylcyclohexyl methacrylate.
Claim 13
Dependent Claim
28 words
An optical resin composition according to Claim 9, wherein the copolymerization ratio of said cyclohexyl methacrylate/methyl methacrylate or said methylcyclohexyl methacrylate/ methyl methacrylate ranges from 40/60 to 60/40.
Claim 14
Dependent Claim
33 words
An optical resin composition according to Claim 7, wherein said copolymers are a copolymer of a cyclohexyl methacrylate with a methyl methacrylate and a copolymer of a methylcyclohexyl methacrylate with a methyl methacrylate.
References Cited (Backward Citations)
DE2635691A1
Cited
DE2730370A1
Cited
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