US4776667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image transmission line
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1982-06-14
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Granted: 1988-10-11
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Expires: 2002-06-14
Abstract
Abstract An image transmitting optical fiber device is improved in contrast by limiting the incident angle of light applied thereto and/or by placing an antireflection member in the light path at one or both of the ends of the device.
Inventors
- 👤 Kenichi Yoshida
- 👤 Kimizo Ono
- 👤 Koichi Tsuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:37
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; G02B23/00; G02B23/24; G02B23/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
An image transmission line, comprising; a plurality of optical fiber elements bundled together and aligned with each other, wherein at least one of the incident end surface and the emergent end surface of the image transmission line is provided with means for removing light rays which can be transmitted between said optical fiber elements and which thereby reduce the contrast of the transmitted image, wherein said means comprises a stopping member for controlling the maximum incident angle of incident light to a value not more than the numerical aperture of the image transmission line at the incident end surface thereof.
Claim 2
Dependent Claim
100 words
An image transmission line, comprising; a plurality of optical fiber elements bundled together and aligned with each other, wherein at least one of the incident end surface and the emergent end surface of the image transmission line is provided with means for removing light rays which can be transmitted between said optical fiber elements and which thereby reduce the contrast of the transmitted image, wherein said means comprises a stopping member for controlling the maximum incident angle of incident light to a value not more than the numerical aperture of the image transmission line at the incident end surface thereof.
Claim 3
Dependent Claim
48 words
The image transmission line as claimed in claim 1, said stopping member comprising an end piece fixed to an incident end surface of said transmission line, and having an angular surface encompassing a solid angle related to said maximum incident angle, and centered about said incident end surface.
Claim 4
Dependent Claim
33 words
The image transmission line as claimed in claim 1, said stopping member comprising a stop ring associated with a lens group arranged in front of said incident end surface of said transmission line.
Claim 5
Dependent Claim
118 words
An image transmission line, comprising; a plurality of optical fiber elements bundled together and aligned with each other, wherein at least one of the incident end surface and the emergent end surface of the image transmission line is provided with means for removing light rays which can be transmitted between said optical fiber elements and which thereby reduce the contrast of the transmitted image, wherein said means comprises a reflection-preventing membrane provided at at least one of the incident end surface and the emergent end surface of the image transmission line and wherein said membrane is applied to a glass plate, said plate being affixed to at least one end of said transmission line through a matching liquid.
Claim 6
Dependent Claim
118 words
An image transmission line, comprising; a plurality of optical fiber elements bundled together and aligned with each other, wherein at least one of the incident end surface and the emergent end surface of the image transmission line is provided with means for removing light rays which can be transmitted between said optical fiber elements and which thereby reduce the contrast of the transmitted image, wherein said means comprises a reflection-preventing membrane provided at at least one of the incident end surface and the emergent end surface of the image transmission line and wherein said membrane is applied to a glass plate, said plate being affixed to at least one end of said transmission line through a matching liquid.
Claim 7
Dependent Claim
60 words
An image transmission line, comprising; a plurality of optical fiber elements bundled together and aligned with each other, wherein the image transmission line is provided at the incident end portion thereof with aperture controlling means for controlling the maximum incident angle of incident light to a value not more than the numerical aperture of the image transmission line or less.
Claim 8
Dependent Claim
60 words
An image transmission line, comprising; a plurality of optical fiber elements bundled together and aligned with each other, wherein the image transmission line is provided at the incident end portion thereof with aperture controlling means for controlling the maximum incident angle of incident light to a value not more than the numerical aperture of the image transmission line or less.
References Cited (Backward Citations)
US3780979A
Cited
US4390012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |