Image stabilizing device

• US 5,809,346 A
• Filed: 03/08/1995
• Issued: 09/15/1998
• Est. Priority Date: 02/27/1990
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Fujisaki, Tatsuo
• Primary Examiner(s): Perkey, W. B.
• Application Number:
  US08/400,668
• Time in Patent Office: 1,287 Days
• Field of Search: 354/430, 354/70, 354/202, 359/554-557, 348/208, 396/52-55
• US Class Current: 396/55
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G03B 2205/003 by a prism with variable angle or the like
• CPC Class Codes: G03B 2205/0069 using electromagnetic actuators, e.g. voice coils
• CPC Class Codes: G03B 2217/005 Blur detection
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing

Abstract

An image stabilizing device includes vibration detection means for detecting a vibrated state, vibration preventing means responsive to the output of the vibration detection means to prevent the vibration of an image, and regulating means for regulating the action of the vibration detection means when the output of the vibration detection means is not appropriate.

Claims

1. An apparatus adapted to an image blur prevention apparatus having a movable member movable for image blur prevention, comprising:

a control portion for, corresponding to an output of a blur detection device for detecting a blur state, controlling an absolute position of said movable member in accordance with a blur signal corresponding to a detected blur displacement, said control portion controlling the absolute position of said movable member so that the blur signal and the absolute position satisfy a predetermined relationship; and

a regulating portion for regulating the movement of the movable member in accordance with said blur signal when said blur signal becomes larger than a predetermined level.

2. An apparatus according to claim 1, wherein said regulating portion comprises means for causing the movable member not to perform the operation corresponding to the output from the blur detection device.

3. An apparatus according to claim 1, wherein said regulating device comprises means for performing the regulation in accordance with that the level of the blur signal is larger than the predetermined level.

4. An apparatus according to claim 3, further comprising release means for releasing the regulation by said regulating portion in accordance with that the level is smaller than the predetermined level.

5. An apparatus according to claim 4, wherein said release means comprises means for releasing the regulation by said regulating portion in accordance with that a state where the level of the blur signal is smaller than the predetermined level, has been kept for a predetermined time period.

6. An apparatus according to claim 1, wherein said blur detection device comprises means for detecting a fluctuation of an apparatus to which image blur is prevented.

7. An apparatus according to claim 1, wherein the image blur correction apparatus comprises image blur correction optical means for optically correcting image blur.

8. An apparatus according to claim 1, wherein the apparatus comprises the blur detection device.

9. An image blur prevention apparatus comprising:

a movable member movable for image blur prevention;

a control portion for, corresponding to an output of a blur detection device for detecting a blur state, controlling an absolute position of said movable member in accordance with a blur signal corresponding to a detected blur displacement, said control portion controlling the absolute position of said movable member so that the blur signal and the absolute position satisfy a predetermined relationship; and

a regulating portion for regulating the movement of the movable member in accordance with said blur signal when said blur signal becomes larger than a predetermined level.

10. An optical equipment to which an image blur prevention apparatus having a movable member movable for image blur prevention is applied, comprising:

a control portion for, corresponding to an output of a blur detection device for detecting a blur state, controlling an absolute position of said movable member in accordance with a blur signal corresponding to a detected blur displacement, said control portion controlling the absolute position of said movable member so that the blur signal and the absolute position satisfy a predetermined relationship; and

a regulating portion for regulating the movement of the movable member in accordance with said blur signal when said blur signal becomes larger than a predetermined level.

11. A camera to which an image blur prevention apparatus having a movable member movable for image blur prevention is applied comprising:

a control portion for, corresponding to an output of a blur detection device for detecting a blur state, controlling an absolute position of said movable member in accordance with a blur signal corresponding to a detected blur displacement, said control portion controlling the absolute position of said movable member so that the blur signal and the absolute position satisfy a predetermined relationship; and

a regulating portion for regulating the movement of the movable member in accordance with said blur signal when said blur signal becomes larger than a predetermined level.