Patent US5134639A successfully refreshed from Google Patents.
US5134639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical communication link
Assignee: Philips Medical Systems Technologies Ltd
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Filing: 1990-06-26
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Granted: 1992-07-28
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Expires: 2010-06-26
Abstract
Abstract An optical communication link coupling a rotating part of a gantry of a computerized tomographic scanner to the stationary part of the gantry. The link comprises an arcuate hollow light conductor having one part rotating with the rotor of the gantry and the other part fixed to the stator of the gantry. Signal bearing light beams are transmitted into the link and are subsequently received from the link after transversing at least a portion theroef.
Inventors
- 👤 Uri Vekstein
- 👤 Simha Levene
- 👤 Dan Zehavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:34
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/80; H04B10/801; A; A61; A61B; A61B6/00; A61B6/56
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
86 words
A system for transmitting data between a rotating part and a stationary part comprising: a rotor, a stator, a hollow light conductor between said rotor and said stator, means for transmitting a light beam modulated responsive to information to be transferred between said rotor and said stator, means for receiving and demodulating said modulated light beam from said hollow light conductor after said modulated light beam has traversed at least a part of said hollow light conductor to obtain said information, means for using said information.
Claim 2
Independent Claim
86 words
A system for transmitting data between a rotating part and a stationary part comprising: a rotor, a stator, a hollow light conductor between said rotor and said stator, means for transmitting a light beam modulated responsive to information to be transferred between said rotor and said stator, means for receiving and demodulating said modulated light beam from said hollow light conductor after said modulated light beam has traversed at least a part of said hollow light conductor to obtain said information, means for using said information.
Claim 3
Dependent Claim
46 words
The system of claim 1 wherein the rotor and the stator are parts of a gantry for a computerized tomography system, the information includes data from X-ray detectors and the means for using the information includes image processing means for deriving an image from said data.
Claim 4
Dependent Claim
20 words
the system for transmitting data of claim 1 wherein said hollow light conductor is circular and coaxial with the rotor.
Claim 5
Dependent Claim
30 words
The system for transmitting data of claim 1 where part of said hollow light conductor is on said rotor and part of said hollow light conductor is on said stator.
Claim 6
Dependent Claim
18 words
The system for transmitting data of claim 1 wherein said hollow light conductor has a rectangular cross section.
Claim 7
Dependent Claim
45 words
The system for transmitting data of claim 5 wherein said hollow light conductor has inner walls describing said rectangular cross section, the inner walls of said rectangular cross section comprising smooth reflecting surfaces, said surfaces being sufficiently smooth to minimize diffusion of the reflective light.
Claim 8
Dependent Claim
17 words
The system for transmitting data of claim 6 wherein said smooth reflecting surfaces comprise aluminized polyethylene terephthalate.
Claim 9
Dependent Claim
31 words
The system of claim 6 wherein said aluminized polyethylene terephthalate is mounted on a polystyrene base and said polystyrene base is mounted on the inner surfaces of said rectangular cross section.
Claim 10
Dependent Claim
72 words
The system of claim 1 wherein said hollow light conductor means has a rectangular cross section and comprises side walls and top and bottom walls, one of said side walls being integral to said stator, the other of said side walls being to integral said rotor, one of said top and bottom walls being integral to the stator and the other of said top and bottom walls being integral to the rotor.
Claim 11
Dependent Claim
45 words
The system of claim 9 wherein said top and bottom walls comprise partial partitions extending from said rotor into the space between said rotor and said stator towards said stator and from said stator toward said rotor into the space between said rotor and stator.
Claim 12
Dependent Claim
13 words
The system of the claim 10 wherein said partial partitions comprise spring steel.
Claim 13
Dependent Claim
40 words
The system of claim 1 wherein said means for transmitting a modulated light beam into said hollow light conductor comprises means for generating a light beam and first mirror means for directing the light beam into the hollow light conductor.
Claim 14
Dependent Claim
25 words
The system of claim 1 wherein said means for receiving and demodulating said modulated light beam from said hollow light conductor comprises second mirror means.
Claim 15
Dependent Claim
21 words
The system of the claim 13 wherein said first and second mirror means are mounted at 45° to the side walls.
Claim 16
Dependent Claim
36 words
The system of claim 13 wherein said means for demodulating said modulator light beams includes photo sensitive diode means for detecting said light beam directed out from said hollow light conductor by said second mirror means.
Claim 17
Dependent Claim
24 words
The system of the claim 13 wherein said means for directing said light beam out from said hollow light conductor includes first lens means.
Claim 18
Dependent Claim
33 words
The system of claim 16 wherein said means for directing said modulated light beam into said hollow light conductor includes second lens means between said light beam generator and said hollow light conductor.
Claim 19
Dependent Claim
15 words
The system of claim 1 wherein lens means are included in the hollow light conductor.
Claim 20
Dependent Claim
28 words
The system of claim 1 wherein means are provided for dividing each hollow light conductor into a plurality of hollow light conductor channels separated by light blocking sections.
Claim 21
Dependent Claim
26 words
The system of the claim 19 wherein a plurality of said transmitters and receivers are mounted to communicate in the light conducting sections of the channels.
Claim 22
Dependent Claim
53 words
The system of claim 20 where a pair of receivers are mounted on the stator substantially 180° apart in light conducting sections juxtaposed to light blocked sections on the parts of the hollow light conductor mounted on the stator, four transmitters are mounted on the rotor and said transmitters being approximately 90° apart.
Claim 23
Dependent Claim
48 words
The system of claim 20 where a pair of receivers are mounted on the rotor substantially 180° apart in light conducting sections juxtaposed to light blocked sections of the hollow light conductor mounted on the rotor, four transmitters mounted on the stator said transmitters being approximately 90° apart.
Claim 24
Dependent Claim
16 words
The system of claim 1 including means for preventing dust from entering said hollow light conductor.
Claim 25
Dependent Claim
121 words
An optical communication link comprising a rotating part and a stationary part, transmitting and receiving means for transmitting information between said stationary part and said rotating part, said transmitting and receiving means comprising: a hollow light conductor for transmitting light signals, means for generating light signals, means for encoding electrical signals onto said light signals, means for coupling said encoded light signals to said hollow light conductor for transmission therethrough, means for receiving said encoded light signals transmitted through at least on part of said hollow optical channel, means for decoding said received encoded light signals for converting said encoded light signals to electrical signals that are a function of said encoded light signals, and means for using said electrical signals.
Claim 26
Dependent Claim
121 words
An optical communication link comprising a rotating part and a stationary part, transmitting and receiving means for transmitting information between said stationary part and said rotating part, said transmitting and receiving means comprising: a hollow light conductor for transmitting light signals, means for generating light signals, means for encoding electrical signals onto said light signals, means for coupling said encoded light signals to said hollow light conductor for transmission therethrough, means for receiving said encoded light signals transmitted through at least on part of said hollow optical channel, means for decoding said received encoded light signals for converting said encoded light signals to electrical signals that are a function of said encoded light signals, and means for using said electrical signals.
References Cited (Backward Citations)
DE2113690A1
Cited
US4259584A
Cited
US4323781A
Cited
US4427983A
Cited
US4555631A
Cited
US4538125A
Cited
US4796183A
Cited
US4794796A
Cited
US4912735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |