US6144505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical component, method of molding optical component, and mold for optical component
Assignee: Canon Inc
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Filing: 1999-04-08
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Granted: 2000-11-07
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Expires: 2019-04-08
Abstract
Abstract This invention provides an optical component free from weld formation in its optical surface and having an excellent optical performance, a method of molding an optical component, and a mold for molding an optical component. For this purpose, an optical component as a plastic molded product having an optical function, is formed with a molding surface with a shape of a curved surface, and a flange portion between the molding surface and a gate portion. At least part of a surface constituting the flange portion is molded by injecting a molten resin along a wall surface that forms an angular difference of 15° or less which is substantially equal to a tangential angle to the curvature of the curved surface of the molding surface, which is near the flange portion.
Inventors
- 👤 Hiroshi Nakanishi
- 👤 Kaoru Okitaka
- 👤 Yoichi Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:00
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29D; B29D11/00; B29D11/00009; G02B3/00; B29L; B29L2011/00; B29L2011/0016; B29L2011/0025
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
88 words
An optical component as a plastic molded product having an optical function, which is formed with a molding surface with a shape of a curved surface, and a flange portion between said molding surface and a gate portion, characterized in that at least part of a surface constituting said flange portion is molded to form an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said molding surface, which is near said flange portion.
Claim 2
Dependent Claim
88 words
An optical component as a plastic molded product having an optical function, which is formed with a molding surface with a shape of a curved surface, and a flange portion between said molding surface and a gate portion, characterized in that at least part of a surface constituting said flange portion is molded to form an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said molding surface, which is near said flange portion.
Claim 3
Dependent Claim
28 words
The optical component according to claim 1, characterized in that said plastic molded product is one of an optical lens, a meniscus convex lens, and a toric lens.
Claim 4
Dependent Claim
88 words
An optical component as a plastic molded product having an optical function, which is formed with a molding surface with a shape of a curved surface, and a flange portion between said molding surface and a gate portion, characterized in that at least part of a surface constituting said gate portion is molded to form an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said molding surface, which is near said gate portion.
Claim 5
Dependent Claim
88 words
An optical component as a plastic molded product having an optical function, which is formed with a molding surface with a shape of a curved surface, and a flange portion between said molding surface and a gate portion, characterized in that at least part of a surface constituting said gate portion is molded to form an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said molding surface, which is near said gate portion.
Claim 6
Dependent Claim
28 words
The optical component according to claim 3, characterized in that said plastic molded product is one of an optical lens, a meniscus convex lens, and a toric lens.
Claim 7
Dependent Claim
85 words
An optical component as a plastic molded product having an optical function, which is formed with a molding surface with a shape of a curved surface, and a gate portion continuous to said molding surface, characterized in that at least part of a surface constituting said gate portion is molded to form an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said molding surface, which is near said gate portion.
Claim 8
Dependent Claim
85 words
An optical component as a plastic molded product having an optical function, which is formed with a molding surface with a shape of a curved surface, and a gate portion continuous to said molding surface, characterized in that at least part of a surface constituting said gate portion is molded to form an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said molding surface, which is near said gate portion.
Claim 9
Dependent Claim
28 words
The optical component according to claim 5, characterized in that said plastic molded product is one of an optical lens, a meniscus convex lens, and a toric lens.
Claim 10
Dependent Claim
90 words
An optical component as a plastic molded product having an optical function, which is formed with a molding surface with a shape of a curved surface, and a runner portion continuous to a gate portion of said plastic molded product, characterized in that at least part of a surface constituting said runner portion is molded to form an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said molding surface, which is near said gate portion.
Claim 11
Dependent Claim
90 words
An optical component as a plastic molded product having an optical function, which is formed with a molding surface with a shape of a curved surface, and a runner portion continuous to a gate portion of said plastic molded product, characterized in that at least part of a surface constituting said runner portion is molded to form an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said molding surface, which is near said gate portion.
Claim 12
Dependent Claim
28 words
The optical component according to claim 7, characterized in that said plastic molded product is one of an optical lens, a meniscus convex lens, and a toric lens.
Claim 13
Independent Claim
135 words
A method of molding an optical component as a plastic molded product having an optical function, characterized in that, of a mold having a first cavity portion having a molding surface with a shape of a curved surface having the optical function, a second cavity portion for molding a flange portion continuous to said molding surface, and a gate portion continuous to said second cavity portion, a resin injection path constituting said second cavity portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said first cavity portion, which is near said second cavity portion, and a resin material injected through said gate portion is guided along said curved surface.
Claim 14
Independent Claim
135 words
A method of molding an optical component as a plastic molded product having an optical function, characterized in that, of a mold having a first cavity portion having a molding surface with a shape of a curved surface having the optical function, a second cavity portion for molding a flange portion continuous to said molding surface, and a gate portion continuous to said second cavity portion, a resin injection path constituting said second cavity portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said first cavity portion, which is near said second cavity portion, and a resin material injected through said gate portion is guided along said curved surface.
Claim 15
Independent Claim
134 words
A method of molding an optical component as a plastic molded product having an optical function, characterized in that, of a mold having a first cavity portion having a molding surface with a shape of a curved surface having the optical function, a second cavity portion for molding a flange portion continuous to said molding surface, and a gate portion continuous to said second cavity portion, a resin injection path constituting said gate portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said first cavity portion, which is near said second cavity portion, and a resin material injected through said gate portion is guided along said curved surface.
Claim 16
Independent Claim
134 words
A method of molding an optical component as a plastic molded product having an optical function, characterized in that, of a mold having a first cavity portion having a molding surface with a shape of a curved surface having the optical function, a second cavity portion for molding a flange portion continuous to said molding surface, and a gate portion continuous to said second cavity portion, a resin injection path constituting said gate portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said first cavity portion, which is near said second cavity portion, and a resin material injected through said gate portion is guided along said curved surface.
Claim 17
Independent Claim
116 words
A method of molding an optical component as a plastic molded product having an optical function, characterized in that, of a mold having a cavity portion having a molding surface with a shape of a curved surface having the optical function, and a gate portion continuous to said molding portion, a resin injection path constituting said gate portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said cavity portion, which is near said gate portion, and a resin material injected through said gate portion is guided along said curved surface.
Claim 18
Independent Claim
116 words
A method of molding an optical component as a plastic molded product having an optical function, characterized in that, of a mold having a cavity portion having a molding surface with a shape of a curved surface having the optical function, and a gate portion continuous to said molding portion, a resin injection path constituting said gate portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said cavity portion, which is near said gate portion, and a resin material injected through said gate portion is guided along said curved surface.
Claim 19
Independent Claim
116 words
A method of molding an optical component as a plastic molded product having an optical function, characterized in that, of a mold at least having a cavity portion having a molding surface with a shape of a curved surface having the optical function, a gate portion, and a runner portion, a resin injection path constituting said runner portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said cavity portion, which is near said gate portion, and a resin material injected through said gate portion is guided along said curved surface.
Claim 20
Independent Claim
116 words
A method of molding an optical component as a plastic molded product having an optical function, characterized in that, of a mold at least having a cavity portion having a molding surface with a shape of a curved surface having the optical function, a gate portion, and a runner portion, a resin injection path constituting said runner portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said cavity portion, which is near said gate portion, and a resin material injected through said gate portion is guided along said curved surface.
Claim 21
Dependent Claim
107 words
A mold used to mold an optical component as a plastic molded product having an optical function, characterized in that said mold has a first cavity portion having a molding surface with a shape of a curved surface having the optical function, a second cavity portion for molding a flange portion continuous to said molding surface, and a gate portion continuous to said second cavity portion, and that a resin injection path constituting said second cavity portion is formed with an angle substantially equal to a tangential angle to a curvature of said curved surface of said first cavity portion, which is near said second cavity portion.
Claim 22
Dependent Claim
107 words
A mold used to mold an optical component as a plastic molded product having an optical function, characterized in that said mold has a first cavity portion having a molding surface with a shape of a curved surface having the optical function, a second cavity portion for molding a flange portion continuous to said molding surface, and a gate portion continuous to said second cavity portion, and that a resin injection path constituting said second cavity portion is formed with an angle substantially equal to a tangential angle to a curvature of said curved surface of said first cavity portion, which is near said second cavity portion.
Claim 23
Dependent Claim
106 words
A mold used to mold an optical component as a plastic molded product having an optical function, characterized in that said mold has a first cavity portion having a molding surface with a shape of a curved surface having the optical function, a second cavity portion for molding a flange portion continuous to said molding surface, and a gate portion continuous to said second cavity portion, and that a resin injection path constituting said gate portion is formed with an angle substantially equal to a tangential angle to a curvature of said curved surface of said first cavity portion, which is near said second cavity portion.
Claim 24
Dependent Claim
106 words
A mold used to mold an optical component as a plastic molded product having an optical function, characterized in that said mold has a first cavity portion having a molding surface with a shape of a curved surface having the optical function, a second cavity portion for molding a flange portion continuous to said molding surface, and a gate portion continuous to said second cavity portion, and that a resin injection path constituting said gate portion is formed with an angle substantially equal to a tangential angle to a curvature of said curved surface of said first cavity portion, which is near said second cavity portion.
Claim 25
Dependent Claim
102 words
A mold used to mold an optical component as a plastic molded product having an optical function, characterized in that said mold has a cavity portion having a molding surface with a shape of a curved surface having the optical function, and a gate portion continuous to said molding surface, and that a resin injection path constituting said gate portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to an angle of tangent to a curvature of said curved surface, near said gate portion, of said cavity portion.
Claim 26
Dependent Claim
102 words
A mold used to mold an optical component as a plastic molded product having an optical function, characterized in that said mold has a cavity portion having a molding surface with a shape of a curved surface having the optical function, and a gate portion continuous to said molding surface, and that a resin injection path constituting said gate portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to an angle of tangent to a curvature of said curved surface, near said gate portion, of said cavity portion.
Claim 27
Dependent Claim
104 words
A mold used to mold an optical component as a plastic molded product having an optical function, characterized in that said mold at least has a cavity portion having a molding surface with a shape of a curved surface having the optical function, and a gate portion and a runner portion, and that a resin injection path constituting said runner portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said cavity portion, which is near said gate portion.
Claim 28
Dependent Claim
104 words
A mold used to mold an optical component as a plastic molded product having an optical function, characterized in that said mold at least has a cavity portion having a molding surface with a shape of a curved surface having the optical function, and a gate portion and a runner portion, and that a resin injection path constituting said runner portion is formed to extend along a wall surface that forms an angular difference of not more than 15° which is substantially equal to a tangential angle to a curvature of said curved surface of said cavity portion, which is near said gate portion.
References Cited (Backward Citations)
US5329406A
Cited
US5286419A
Cited
US5694256A
Cited
US5434707A
Cited
US5788910A
Cited
US5808817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-07 | 2004-05-08 | 2004-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-07 | 2008-05-08 | 2008-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-07 | 2012-05-08 | 2012-11-07 | $7700.00 | Window Closed / Lapsed |