Patent US5760942A successfully refreshed from Google Patents.
US5760942A
Expired / Lapsed
US
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Noise tolerant receiver for wideband optical transmission system
Assignee: Photonics Corp
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Filing: 1995-11-28
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Granted: 1998-06-02
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Expires: 2015-11-28
Abstract
Abstract Reduction of lower frequency interfering signals including signals from fluorescent light systems can be achieved by an optical receiving system, before the detection process, by differentiating the signal and then using a modified detection process to detect the differentiated signal. At least one data channel is included in the optical receiving system, each data channel including an optical receiving transducer which receives optical transmissions from an optical transmitter positioned a distance away from the optical receiving system. From the transducer, the received signal is differentiated and amplified to remove unwanted interfering signals from the received signal before it is transmitted to a detector. The detector converts the differentiated and amplified signal into an output data stream which corresponds to the signal originally presented to the optical transmitter.
Inventors
- 👤 Lawrence Matthias Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:05
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/60; H04B10/66
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
129 words
A noise tolerant optical receiver for decreasing a level of low frequency and DC components within a received optical signal comprising: a. means for receiving an optical signal from an optical signal transmitter; b. means for amplifying the optical signal coupled to the means for receiving for creating an amplified optical signal; c. means for differentiating the optical signal coupled to the means for amplifying, for receiving the amplified optical signal and creating a differentiated optical signal; d. means for filtering coupled to the means for differentiating for removing high frequency components from the differentiated optical signal; and e. means for detecting the differentiated optical signal coupled to the means for filtering, for forming an output data stream corresponding to the optical signal received by the means for receiving.
Claim 2
Dependent Claim
129 words
A noise tolerant optical receiver for decreasing a level of low frequency and DC components within a received optical signal comprising: a. means for receiving an optical signal from an optical signal transmitter; b. means for amplifying the optical signal coupled to the means for receiving for creating an amplified optical signal; c. means for differentiating the optical signal coupled to the means for amplifying, for receiving the amplified optical signal and creating a differentiated optical signal; d. means for filtering coupled to the means for differentiating for removing high frequency components from the differentiated optical signal; and e. means for detecting the differentiated optical signal coupled to the means for filtering, for forming an output data stream corresponding to the optical signal received by the means for receiving.
Claim 3
Dependent Claim
24 words
The noise tolerant optical receiver as claimed in claim 1 further comprising means for coupling the output data stream to a first digital system.
Claim 4
Dependent Claim
32 words
The noise tolerant optical receiver as claimed in claim 2 wherein the optical signal received from the optical signal transmitter is modulated light representing a digital signal from a second digital system.
Claim 5
Dependent Claim
28 words
The noise tolerant optical receiver as claimed in claim 3 wherein the means for detecting further comprises means for converting the output data stream into a digital signal.
Claim 6
Dependent Claim
49 words
The noise tolerant optical receiver as claimed in claim 1 wherein the means for amplifying comprises a preamplifier and an amplifier and wherein the means for receiving is coupled to an input of the preamplifier and an output of the preamplifier is coupled to an input of the amplifier.
Claim 7
Dependent Claim
18 words
The noise tolerant optical receiver as claimed in claim 5 wherein the amplifier is a fixed gain amplifier.
Claim 8
Dependent Claim
19 words
The noise tolerant optical receiver as claimed in claim 5 wherein the amplifier is an electronically adjustable gain amplifier.
Claim 9
Dependent Claim
29 words
The noise tolerant optical receiver as claimed in claim 1 wherein the means for differentiating comprises a differentiator coupled to the means for amplifying and the means for detecting.
Claim 10
Dependent Claim
21 words
The noise tolerant optical receiver as claimed in claim 1 wherein the optical signal is transmitted through a free space medium.
Claim 11
Dependent Claim
144 words
A noise tolerant optical receiver comprising: a. one or more data channels for receiving a transmitted signal, each data channel comprising a means for receiving an optical signal and an output for coupling the received optical signal to a digital system; b. means for amplifying the optical signal having one or more inputs and an output, each input coupled to an output of each of the data channels; c. means for differentiating the optical signal coupled to the means for amplifying, for creating an amplified and differentiated optical signal; d. means for filtering coupled to the means for amplifying for removing high frequency components from the amplified and differentiated signal; and e. means for detecting the amplified and differentiated optical signal coupled to the means for filtering, for creating an output data stream corresponding to the optical signal received by the means for receiving.
Claim 12
Dependent Claim
144 words
A noise tolerant optical receiver comprising: a. one or more data channels for receiving a transmitted signal, each data channel comprising a means for receiving an optical signal and an output for coupling the received optical signal to a digital system; b. means for amplifying the optical signal having one or more inputs and an output, each input coupled to an output of each of the data channels; c. means for differentiating the optical signal coupled to the means for amplifying, for creating an amplified and differentiated optical signal; d. means for filtering coupled to the means for amplifying for removing high frequency components from the amplified and differentiated signal; and e. means for detecting the amplified and differentiated optical signal coupled to the means for filtering, for creating an output data stream corresponding to the optical signal received by the means for receiving.
Claim 13
Dependent Claim
21 words
The noise tolerant optical receiver as claimed in claim 10 wherein the optical signal is transmitted through a free space medium.
Claim 14
Dependent Claim
27 words
The noise tolerant optical receiver as claimed in claim 10 further comprising means for transmitting the amplified and differentiated optical signal coupled to the means for detecting.
Claim 15
Dependent Claim
33 words
The noise tolerant optical receiver as claimed in claim 12 wherein each data channel further comprises a pre-amplifier coupled to the means for receiving, for amplifying the level of the received optical signal.
Claim 16
Dependent Claim
32 words
The noise tolerant optical receiver as claimed in claim 13 wherein the means for differentiating comprises one or more differentiators each coupled to a data channel and to the means for amplifying.
Claim 17
Dependent Claim
29 words
The noise tolerant optical receiver as claimed in claim 13 wherein the means for differentiating comprises a differentiator coupled to the means for amplifying and the means for detecting.
Claim 18
Independent Claim
65 words
A method of removing unnecessary portions of a received optical signal comprising the steps of: a. receiving the optical signal from an optical signal transmitter; b. amplifying the optical signal; c. differentiating the optical signal; d. removing high frequency components from the optical signal; and e. detecting the amplified and differentiated optical signal and creating an output data stream corresponding to the received optic signal.
Claim 19
Independent Claim
65 words
A method of removing unnecessary portions of a received optical signal comprising the steps of: a. receiving the optical signal from an optical signal transmitter; b. amplifying the optical signal; c. differentiating the optical signal; d. removing high frequency components from the optical signal; and e. detecting the amplified and differentiated optical signal and creating an output data stream corresponding to the received optic signal.
Claim 20
Dependent Claim
23 words
The method as claimed in claim 16 further comprising the step of coupling the amplified and differentiated optical signal to a digital system.
Claim 21
Dependent Claim
118 words
A noise tolerant optical transmission system comprising: a. an optical transmitter for transmitting data using a light source; b. an optical receiver for receiving the data from the optical transmitter; c. a differentiator coupled to the optical receiver for removing lower frequency and DC components from the data and creating a differentiated signal; d. an amplifier coupled to the differentiator for amplifying the differentiated signal and creating an amplified signal; e. a filter coupled to the amplifier for removing high frequency components from the amplified signal; and f. a detector coupled to the filter for detecting the amplified signal and creating an output data stream corresponding to the data received by the optical receiver from the optical transmitter.
Claim 22
Dependent Claim
118 words
A noise tolerant optical transmission system comprising: a. an optical transmitter for transmitting data using a light source; b. an optical receiver for receiving the data from the optical transmitter; c. a differentiator coupled to the optical receiver for removing lower frequency and DC components from the data and creating a differentiated signal; d. an amplifier coupled to the differentiator for amplifying the differentiated signal and creating an amplified signal; e. a filter coupled to the amplifier for removing high frequency components from the amplified signal; and f. a detector coupled to the filter for detecting the amplified signal and creating an output data stream corresponding to the data received by the optical receiver from the optical transmitter.
Claim 23
Dependent Claim
20 words
The noise tolerant optical transmission system as claimed in claim 18 wherein the amplifier is an electronically adjustable gain amplifier.
Claim 24
Dependent Claim
32 words
The noise tolerant optical transmission system as claimed in claim 19 further comprising a pre-amplifier coupled to the optical receiver and the differentiator for amplifying the data received by the optical receiver.
Claim 25
Dependent Claim
22 words
The noise tolerant optical transmission system as claimed in claim 20 wherein the optical signal is transmitted through a free space medium.
Claim 26
Dependent Claim
19 words
The noise tolerant optical transmission system as claimed in claim 18 wherein the amplifier is a fixed gain amplifier.
Claim 27
Dependent Claim
128 words
A noise tolerant optical receiver for decreasing a level of low frequency and DC components within a received optical signal comprising: a. means for receiving an optical signal from an optical signal transmitter; b. means for differentiating the optical signal coupled to the means for receiving for creating a differentiated optical signal; c. means for amplifying the optical signal coupled to the means for differentiating for receiving the differentiated optical signal and creating an amplified optical signal; d. means for filtering coupled to the means for amplifying for removing high frequency components from the amplified signal; and e. means for detecting the amplified optical signal coupled to the means for filtering, for forming an output data stream corresponding to the optical signal received by the means for receiving.
Claim 28
Dependent Claim
128 words
A noise tolerant optical receiver for decreasing a level of low frequency and DC components within a received optical signal comprising: a. means for receiving an optical signal from an optical signal transmitter; b. means for differentiating the optical signal coupled to the means for receiving for creating a differentiated optical signal; c. means for amplifying the optical signal coupled to the means for differentiating for receiving the differentiated optical signal and creating an amplified optical signal; d. means for filtering coupled to the means for amplifying for removing high frequency components from the amplified signal; and e. means for detecting the amplified optical signal coupled to the means for filtering, for forming an output data stream corresponding to the optical signal received by the means for receiving.
Claim 29
Dependent Claim
21 words
The noise tolerant optical receiver as claimed in claim 23 wherein the optical signal is transmitted through a free space medium.
Claim 30
Dependent Claim
24 words
The noise tolerant optical receiver as claimed in claim 23 further comprising means for coupling the output data stream to a first digital system.
Claim 31
Dependent Claim
32 words
The noise tolerant optical receiver as claimed in claim 25 wherein the optical signal received from the optical signal transmitter is modulated light representing a digital signal from a second digital system.
Claim 32
Dependent Claim
28 words
The noise tolerant optical receiver as claimed in claim 26 wherein the means for detecting further comprises means for converting the output data stream into a digital signal.
Claim 33
Dependent Claim
55 words
The noise tolerant optical receiver as claimed in claim 23 further comprising a preamplifier coupled to the means for receiving and to the means for differentiating wherein the means for receiving is coupled to an input of the preamplifier and an output of the preamplifier is coupled to an input of the means for differentiating.
Claim 34
Dependent Claim
55 words
The noise tolerant optical receiver as claimed in claim 28 wherein the means for differentiating comprises a differentiator coupled between the preamplifier and the means for amplifying so that the output of the preamplifier is coupled to an input of the differentiator and an output of the differentiator is coupled to the means for amplifying.
Claim 35
Dependent Claim
29 words
The noise tolerant optical receiver as claimed in claim 23 wherein the means for differentiating comprises a differentiator coupled to the means for amplifying and the means for detecting.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |