US4585011A
Expired / Lapsed
US
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Conjugate eye movement detector for sleep analysis
Assignee: University of Ottawa
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Filing: 1984-10-10
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Granted: 1986-04-29
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Expires: 2004-10-10
Abstract
Abstract The eye movement detector detects events occurring during the electro-oculogram (EOG) signal in which components of the signal having a predetermined rise time, are coincident with components of the same signal having a predetermined amplitude.
Inventors
- 👤 Roger Broughton
- 👤 Bernardo da Costa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:20
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4806; A61B5/4815
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A rapid eye movement detector for a sleep analyser comprising: means for combining a left eye EOG signal and a right eye EOG signal to provide an electro-oculogram signal, means for receiving the combined electro-oculogram (EOG) signal; first means for selecting components of the combined EOG signal havina a predetermined rise time; second means for selecting components of the combined EOG signal having a predetermined amplitude; and means for producing an output pulse each time a predetermined rise time component is coincident with a predetermined amplitude component, as an indication of rapid movement of the left and the right eyes in synchrony.
Claim 2
Dependent Claim
102 words
A rapid eye movement detector for a sleep analyser comprising: means for combining a left eye EOG signal and a right eye EOG signal to provide an electro-oculogram signal, means for receiving the combined electro-oculogram (EOG) signal; first means for selecting components of the combined EOG signal havina a predetermined rise time; second means for selecting components of the combined EOG signal having a predetermined amplitude; and means for producing an output pulse each time a predetermined rise time component is coincident with a predetermined amplitude component, as an indication of rapid movement of the left and the right eyes in synchrony.
Claim 3
Dependent Claim
30 words
A rapid eye movement detector das claimed in claim 1 wherein the first selecting means is a bandpass filter having a real time frequency band from 1.3 to 5.4 Hz.
Claim 4
Dependent Claim
32 words
A rapid eye movement detector as claimed in claim 1 wherein the second selecting means includes a positive and a negative threshold discriminator, each connected to one input terminal of an or-gate.
References Cited (Backward Citations)
US3548812A
Cited
US4359724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |