US5459542A
Expired / Lapsed
US
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Image-blur preventing apparatus
Assignee: Canon Inc
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Filing: 1993-12-21
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Granted: 1995-10-17
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Expires: 2013-12-21
Abstract
Abstract An image-blur preventing apparatus includes an image-blur correcting device that is driven in accordance with a subject distance to compensate for the location of an image-blur correcting optical device being located at a position different from a rotational center of the apparatus corresponding to rotational displacement due to a hand shake. The rotational center can be specified at a constant point, and a simple relationship between the needed correction and the subject distance can be established, thereby enabling image-blur prevention.
Inventors
- 👤 Akihiro Fujiwara
- 👤 Kazuhiro Noguchi
- 👤 Tsuyoshi Morofuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:59
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; H; H04; H04N; H04N23/00; H04N23/60; H04N23/68; H04N23/682; H04N23/685; H04N23/686; G03; G03B; G03B5/00; H04N23/681; H04N23/6812; G03B2205/00; G03B2205/0007; G03B2205/0053; G03B2217/00; G03B2217/005
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
119 words
An apparatus usable with an image blur prevention device for preventing image blur in an imaging system that forms an image, said apparatus comprising: first input means for inputting a first signal corresponding to a distance to an object that is a subject of the imaging system; second input means for inputting a second signal corresponding to an angular changing state of the imaging system; and signal processing means for determining image blur based on the first signal and the second signal input, respectively, by said first input means and said second input means, the image blur including an image blur corresponding to a distance between the image blur prevention device and a rotational center of the imaging system.
Claim 2
Independent Claim
119 words
An apparatus usable with an image blur prevention device for preventing image blur in an imaging system that forms an image, said apparatus comprising: first input means for inputting a first signal corresponding to a distance to an object that is a subject of the imaging system; second input means for inputting a second signal corresponding to an angular changing state of the imaging system; and signal processing means for determining image blur based on the first signal and the second signal input, respectively, by said first input means and said second input means, the image blur including an image blur corresponding to a distance between the image blur prevention device and a rotational center of the imaging system.
Claim 3
Dependent Claim
44 words
An apparatus according to claim 1, wherein the image blur prevention device comprises an image blur prevention portion, said signal processing means comprising means for obtaining an output signal of the image blur prevention portion based on the first signal and the second signal.
Claim 4
Dependent Claim
32 words
An apparatus according to claim 2, wherein said signal processing means further comprises changing means for changing, based on the first signal, a relation between the second signal and the output signal.
Claim 5
Dependent Claim
32 words
An apparatus according to claim 3, wherein said changing means increases the output signal in accordance with a change in the first signal corresponding to the distance to the object being shortened.
Claim 6
Dependent Claim
38 words
An apparatus according to claim 2, wherein the image blur prevention portion comprises means for preventing image blur by changing a relation between the image formed by the imaging system and an imaging plane of the imaging system.
Claim 7
Dependent Claim
33 words
An apparatus according to claim 5, wherein the image blur prevention portion further comprises means for preventing image blur by moving the image formed by the imaging system relative to an absolute space.
Claim 8
Dependent Claim
20 words
An apparatus according to claim 5, wherein the image blur prevention portion further comprises means for deflecting a light beam.
Claim 9
Dependent Claim
20 words
An apparatus according to claim 6, wherein the image blur prevention portion further comprises means for deflecting a light beam.
Claim 10
Dependent Claim
61 words
An apparatus according to claim 1, wherein said apparatus is usable with a focus adjustment device for performing focus adjustment and the image blur prevention device comprises means for performing image blur prevention for an image being focus adjusted by the focus adjustment device, and wherein the first signal corresponds to a state of focus adjustment by the focus adjustment device.
Claim 11
Dependent Claim
40 words
An apparatus according to claim 9, wherein the focus adjustment device comprises a focus adjustment optical system, and wherein said first input means comprises means for inputting a signal corresponding to a movement state of the focus adjustment optical system.
Claim 12
Dependent Claim
18 words
An apparatus according to claim 10, wherein the focus adjustment optical system is disposed in the imaging system.
Claim 13
Dependent Claim
26 words
An apparatus according to claim 1, wherein said second input means comprises means for inputting a signal corresponding to an angular deviation of the imaging system.
Claim 14
Dependent Claim
43 words
An apparatus according to claim 1, wherein said apparatus is usable with an angular changing state detection device for detecting an angular changing state, and wherein said second input means comprises means for inputting an output of the angular changing state detection device.
Claim 15
Dependent Claim
23 words
An apparatus according to claim 13, wherein the angular changing state detection device comprises an angular velocity sensor for detecting an angular velocity.
Claim 16
Dependent Claim
27 words
An apparatus according to claim 14, wherein the angular changing state detection device further comprises an integrating circuit for integrating an output of the angular velocity sensor.
Claim 17
Dependent Claim
17 words
An apparatus according to claim 13, wherein said apparatus further comprises the angular changing state detection device.
Claim 18
Dependent Claim
22 words
An apparatus according to claim 1, wherein said apparatus further comprises means for disposing said apparatus in the image blur prevention device.
Claim 19
Dependent Claim
19 words
An apparatus according to claim 1, wherein said apparatus further comprises means for disposing said apparatus in optical equipment.
Claim 20
Dependent Claim
19 words
An apparatus according to claim 18, wherein said apparatus further comprises means for disposing said apparatus in a camera.
Claim 21
Dependent Claim
134 words
An image blur prevention apparatus usable with an imaging system for forming an image, said image blur prevention apparatus comprising: image blur prevention means for preventing image blur; first input means for inputting a first signal corresponding to a distance to an object that is a subject of the imaging system; second input means for inputting a second signal corresponding to an angular changing state of the imaging system; and driving control means for causing said image blur prevention means to perform an operation for preventing image blur based on the first signal and the second signal input, respectively, by said first input means and said second input means, the image blur including an image blur corresponding to a distance between said image blur prevention means and a rotational center of the imaging system.
Claim 22
Dependent Claim
134 words
An image blur prevention apparatus usable with an imaging system for forming an image, said image blur prevention apparatus comprising: image blur prevention means for preventing image blur; first input means for inputting a first signal corresponding to a distance to an object that is a subject of the imaging system; second input means for inputting a second signal corresponding to an angular changing state of the imaging system; and driving control means for causing said image blur prevention means to perform an operation for preventing image blur based on the first signal and the second signal input, respectively, by said first input means and said second input means, the image blur including an image blur corresponding to a distance between said image blur prevention means and a rotational center of the imaging system.
Claim 23
Dependent Claim
40 words
An image blur prevention apparatus according to claim 20, wherein said driving control means comprises changing means for changing, based on the first signal, a relation between the second signal and the operation performed by said image blur prevention means.
Claim 24
Dependent Claim
41 words
An image blur prevention apparatus according to claim 21, wherein said changing means increases the operation performed by said image blur prevention means in accordance with a change in the first signal corresponding to the distance to the object being shortened.
Claim 25
Dependent Claim
41 words
An image blur prevention apparatus according to claim 20, wherein said image blur prevention means comprises means for preventing image blur by changing a relation between the image formed by the imaging system and an imaging plane of the imaging system.
Claim 26
Dependent Claim
36 words
An image blur prevention apparatus according to claim 23, wherein said image blur prevention means further comprises means for preventing image blur by moving the image formed by the imaging system relative to an absolute space.
Claim 27
Dependent Claim
23 words
An image blur prevention apparatus according to claim 23, wherein said image blur prevention means further comprises means for deflecting a light beam.
Claim 28
Dependent Claim
23 words
An image blur prevention apparatus according to claim 24, wherein said image blur prevention means further comprises means for deflecting a light beam.
Claim 29
Dependent Claim
49 words
An image blur prevention apparatus according to claim 20, wherein said image blur prevention apparatus is usable with an angular changing state detection device for detecting an angular changing state, and wherein said second input means comprises means for inputting an output of the angular changing state detection device.
Claim 30
Dependent Claim
22 words
An image blur prevention apparatus according to claim 27, wherein said image blur prevention apparatus comprises the angular changing state detection device.
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) | 1998-10-16 | 1999-04-17 | 1999-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-16 | 2003-04-17 | 2003-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-16 | 2007-04-17 | 2007-10-17 | $7700.00 | Window Closed / Lapsed |