US5737288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position sensing for an optical recording actuator
Assignee: Eastman Kodak Co
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Filing: 1996-06-07
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Granted: 1998-04-07
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Expires: 2016-06-07
Abstract
Abstract An optical recording actuator is disclosed and includes a base and a moveable actuator lens holder having its position controlled between two to six degrees of freedom of motion. Such lens holder including an objective lens. The actuator further includes a sensing system a light source and three sensors and mounted on the moveable lens holder three separate plates, each corresponding to a sensor and having an aperture and arranged so that light from the source passes through the aperture of each plate and illuminates its corresponding sensor mounted on the base. Each sensor includes an arrangement for providing position detection in two orthogonal directions and a microprocessor responsive to the position detection to determine the position of the moveable lens holder with respect to the base in six degrees of freedom of motion.
Inventors
- 👤 Philip F. Marino
- 👤 Charles J. Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:51
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/085; G11B7/09; G11B7/0857; G11B7/08582; G11B7/08588
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
An optical recording actuator comprising: a) a base; b) a moveable lens holder having its position controlled between two to six degrees of freedom of motion, such lens holder including an objective lens; c) a sensor assembly including mounted on the base a light source and three sensors and mounted on the moveable lens holder, means defining three separate apertures, each corresponding to a sensor and arranged so that light from the source passes through the apertures and illuminates its corresponding sensor mounted on the base, each sensor having: i) means for providing position detection in two orthogonal directions; and d) computing means responsive to the position detection means to determine the position of the moveable lens holder with respect to the base in six degrees of freedom of motion.
Claim 2
Dependent Claim
130 words
An optical recording actuator comprising: a) a base; b) a moveable lens holder having its position controlled between two to six degrees of freedom of motion, such lens holder including an objective lens; c) a sensor assembly including mounted on the base a light source and three sensors and mounted on the moveable lens holder, means defining three separate apertures, each corresponding to a sensor and arranged so that light from the source passes through the apertures and illuminates its corresponding sensor mounted on the base, each sensor having: i) means for providing position detection in two orthogonal directions; and d) computing means responsive to the position detection means to determine the position of the moveable lens holder with respect to the base in six degrees of freedom of motion.
Claim 3
Dependent Claim
138 words
An optical recording actuator comprising: a) a base; b) a moveable lens holder having its position controlled between two to six degrees of freedom of motion, such lens holder including an objective lens; c) sensor means including mounted on the base a light source and three sensors and mounted on the moveable lens holder three separate plates, each corresponding to a sensor and having an aperture and arranged so that light from the source passes through the aperture of each plate and illuminates its corresponding sensor mounted on the base, each sensor having: i) four independent photosensitive elements, each providing a separate output signal; and d) computing means responsive to each output signal of the photosensitive elements to determine the position of the moveable lens holder with respect to the base in six degrees of freedom of motion.
Claim 4
Dependent Claim
138 words
An optical recording actuator comprising: a) a base; b) a moveable lens holder having its position controlled between two to six degrees of freedom of motion, such lens holder including an objective lens; c) sensor means including mounted on the base a light source and three sensors and mounted on the moveable lens holder three separate plates, each corresponding to a sensor and having an aperture and arranged so that light from the source passes through the aperture of each plate and illuminates its corresponding sensor mounted on the base, each sensor having: i) four independent photosensitive elements, each providing a separate output signal; and d) computing means responsive to each output signal of the photosensitive elements to determine the position of the moveable lens holder with respect to the base in six degrees of freedom of motion.
Claim 5
Dependent Claim
46 words
The optical recording actuator of claim 2 wherein the computing means comprises means for digitizing each of the output signals and a microprocessor responsive to the digitized output signals for calculating the six degrees of freedom of motion of the lens holder relative to the base.
Claim 6
Dependent Claim
23 words
The optical recording actuator of claim 3 wherein the sensor means includes four independent quad photosensitive elements, each providing a separate output signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |