US4741595A
Expired / Lapsed
US
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Optical transmission device
Assignee: Hitachi Ltd
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Filing: 1985-07-15
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Granted: 1988-05-03
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Expires: 2005-07-15
Abstract
Abstract In a device for coupling optically a light source with an optical transmission path, the present invention interposes an optical transmission path structure at the center of the distance between them in order to improve the optical coupling efficiency. The optical transmission path structure consists of a plurality of light transmitting elements arranged so that the light from the light source is received by the structure as incident light and is sent out therefrom as outgoing light at an outgoing angle which is equal to the angle of incidence. The light transmitting elements are arranged in parallel with the optical path of the light emitted from the light source and according to this arrangement, the system of the present device becomes equivalent to a system in which the positions of the light source are located at points of ±l 1 from the light outgoing surface of the optical transmission path structure. When used with an optical fiber, the optical transmission path structure is disposed such that the distance from the light source to one end face of the optical transmission path structure is the same as the distance from the end face of the means for transmitting to the other end face of the optical transmission path structure.
Inventors
- 👤 Seiichi Onoda
- 👤 Yasumasa Koakutsu
- 👤 Masaaki Kusano
- 👤 Tamio Takeuchi
- 👤 Syouji Yamada
- 👤 Masao Yano
- 👤 Ichiro Ikushima
- 👤 Kiyohide Miyake
- 👤 Toshiki P. Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:36
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; G02B6/08; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4206; G02B6/4249
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
An optical transmission device comprising: a light source; an optical transmission path structure comprising a plurality of light transmitting elements disposed in an optical path of transmission light emitted from said light source for receiving the transmission light as incident light having an angle of incidence and for outputting the incident light at an outgoing angle equal to the angle of incidence; and means for transmitting the light output by said optical transmission path structure; each of said light transmitting elements of said optical transmission path structure being arranged in parallel with the optical path of the transmission light being disposed such that the distance from the light source to one end face of the optical transmission path structure is the same as the distance from the end face of the means for transmitting to the other end face of the optical transmission path structure.
Claim 2
Dependent Claim
145 words
An optical transmission device comprising: a light source; an optical transmission path structure comprising a plurality of light transmitting elements disposed in an optical path of transmission light emitted from said light source for receiving the transmission light as incident light having an angle of incidence and for outputting the incident light at an outgoing angle equal to the angle of incidence; and means for transmitting the light output by said optical transmission path structure; each of said light transmitting elements of said optical transmission path structure being arranged in parallel with the optical path of the transmission light being disposed such that the distance from the light source to one end face of the optical transmission path structure is the same as the distance from the end face of the means for transmitting to the other end face of the optical transmission path structure.
Claim 3
Dependent Claim
22 words
The optical transmission device as defined in claim 1 wherein said optical transmission path structure consists of an aggregate of optical fiber.
Claim 4
Dependent Claim
22 words
The optical transmission device as defined in claim 1 wherein said optical transmission path structure is formed in a radial concentric circle.
Claim 5
Dependent Claim
127 words
An optical transmission device comprising: an optical element; an optical fiber; and an optical transmission path structure comprising a plurality of light transmitting elements disposed in an optical path between said optical element and said optical fiber for outputting transmission light at an outgoing angle equal to an angle of incidence of the transmission light incident thereto; each of said light transmitting elements of said optical transmission path structure being arranged in parallel with the optical axis of the transmission light and being disposed such that the distance from the optical element to one end face of the optical transmission path structure is the same as the distance from the end face of the optical fibe to the other end face of the optical transmission path structure.
Claim 6
Dependent Claim
127 words
An optical transmission device comprising: an optical element; an optical fiber; and an optical transmission path structure comprising a plurality of light transmitting elements disposed in an optical path between said optical element and said optical fiber for outputting transmission light at an outgoing angle equal to an angle of incidence of the transmission light incident thereto; each of said light transmitting elements of said optical transmission path structure being arranged in parallel with the optical axis of the transmission light and being disposed such that the distance from the optical element to one end face of the optical transmission path structure is the same as the distance from the end face of the optical fibe to the other end face of the optical transmission path structure.
Claim 7
Dependent Claim
22 words
The optical transmission device as defined in claim 4 wherein said optical transmission path structure consists of an aggregate of optical fiber.
Claim 8
Dependent Claim
22 words
The optical transmission device as defined in claim 4 wherein said optical transmission path structure is formed in a radial concentric circle.
Claim 9
Dependent Claim
58 words
The optical transmission device as defined in claim 4 wherein a light emitting element, a driving circuit of said light emitting element, a light receiving element and a reception circuit for said light receiving element are disposed on said optical transmission path structure, said optical transmission path structure comprising a substrate consisting of an aggregate of optical fiber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |