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Patent US4929965A successfully refreshed from Google Patents.
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US4929965A Expired / Lapsed US ⏱️ 0.0 years remaining

Optical writing head

Assignee: Alps Alpine Co Ltd
•
Filing: 1988-08-04
•
Granted: 1990-05-29
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Expires: 2008-08-04
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Abstract

Abstract An optical writing head which is simplified in construction and reduced in production cost. The optical writing head comprises a light emitting means, and a substrate on which the light emitting means is mounted. The substrate has a light transmitting property at a portion thereof which opposes to the light emitting means. Light emitted from the light emitting means is taken out through the substrate so that it may be irradiated upon a light receiving body. A fiber bundle may be provided with one end opposed to the light emitting means and with the other end opposed to an object for exposure. Where the head is of a type wherein it contacts with an object when it optically writes, the other end of the fiber bundle is formed into a curved face, but where the head is of another type wherein it does not contact with an object when writing, a gas blowing out means is provided to assure a gap between the other end of the fiber bundle and an object. A plurality of flexible printed circuits may be connected to the light emitting means in an opposing relationship to a light emitting portion of the light emitting means.

Inventors

  • 👤 Masashi Fuse

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 21:25
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/45; H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/681; H10W72/00; H10W72/851; H10W72/874; H10W72/877; H10W72/879; H10W90/00; H10W90/701; H10W90/751; H10W90/754; Y; Y10; Y10S; Y10S362/00; Y10S362/80

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 88 words
An optical writing head, comprising a light emitting means, and a substrate on which said light emitting means is mounted, said substrate having a light transmitting property at a portion thereof which opposes to said light emitting means, whereby light emitted from said light emitting means is taken out through said substrate so that it may be irradiated upon a light receiving body, wherein said light emitting means is covered with a cover, and wherein a filler is filled up between said light emitting means and said cover.
Claim 2
Dependent Claim 88 words
An optical writing head, comprising a light emitting means, and a substrate on which said light emitting means is mounted, said substrate having a light transmitting property at a portion thereof which opposes to said light emitting means, whereby light emitted from said light emitting means is taken out through said substrate so that it may be irradiated upon a light receiving body, wherein said light emitting means is covered with a cover, and wherein a filler is filled up between said light emitting means and said cover.
Claim 3
Dependent Claim 22 words
An optical writing head according to claim 1, wherein said filler comprises either a conductive paste or a conductive sealing synthetic resin.
Claim 4
Dependent Claim 26 words
An optical writing head according to claim 1 wherein a transparent resin is filled between a front surface of said light emitting means and said substrate.
Claim 5
Dependent Claim 29 words
An optical writing head according to claim 1 wherein a fiber bundle composed of a plurality of optical fibers is buried in at least a portion of said substrate.
Claim 6
Dependent Claim 97 words
An optical writing head, comprising a light emitting means, a substrate on which said light emitting means is mounted, said substrate having a fiber bundle composed of a plurality of optical fibers positioned in at least a portion thereof which opposes to said light emitting means, whereby light emitted from said light emitting means is incident to one end of said fiber bundle and emitted out the other end of said fiber bundle, and wherein a transparent resin having a high refractivity is positioned between said light emitting means and said one end of said fiber bundle.
Claim 7
Dependent Claim 97 words
An optical writing head, comprising a light emitting means, a substrate on which said light emitting means is mounted, said substrate having a fiber bundle composed of a plurality of optical fibers positioned in at least a portion thereof which opposes to said light emitting means, whereby light emitted from said light emitting means is incident to one end of said fiber bundle and emitted out the other end of said fiber bundle, and wherein a transparent resin having a high refractivity is positioned between said light emitting means and said one end of said fiber bundle.
Claim 8
Dependent Claim 27 words
An optical writing head according to claim 5 wherein said transparent resin is filled completely between a front surface of said light emitting means and said substrate.

References Cited (Backward Citations)

US4478504A Cited
US4549784A Cited
US4700206A Cited
US4827290A Cited
US4820013A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-05-28 1993-11-27 1994-05-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-05-28 1997-11-27 1998-05-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-05-28 2001-11-27 2002-05-29 $7700.00 Window Closed / Lapsed

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