Image blur correction apparatus and image pickup apparatus with the image blur correction apparatus

• US 6,470,147 B2
• Filed: 04/02/2001
• Issued: 10/22/2002
• Est. Priority Date: 04/06/2000
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Imada, Shinji
• Primary Examiner(s): Perkey, W. B.
• Application Number:
  US09/822,336
• Publication Number:
  US 20010038749A1
• Time in Patent Office: 568 Days
• Field of Search: 396/55, 396/52, 348/208
• US Class Current: 396/55
• CPC Class Codes: G03B 2205/0007 Movement of one or more optical elements for control of motion blur
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: G03B 5/02 Lateral adjustment of lens

Abstract

A vibration preventing apparatus and an image pickup apparatus such as a camera which have a vibration correction lens driven on the basis of the output of vibration detecting means for detecting the vibration of the camera and for correcting the vibration, and a plurality of resilient members for positioning the vibration correction lens at the correction center, and changes the correction center in conformity with the exposure time and/or the focal length of the camera to thereby mitigate the resonance with the frequency of the vibration.

Claims

1. An image blur correction apparatus comprising:

vibration detecting means for detecting vibration of an image pickup apparatus;

correction means for correcting image blur attributable to the vibration;

a plurality of resilient members for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the correction center in the drive of said correction means when an exposure time of the image pickup apparatus is shorter than a predetermined time.

3. An image blur correction apparatus according to claim 1 or 2, wherein said correction means is movable in a first direction and a second direction differing from the first direction, and said control means controls the drive of said correction means so as to effect the changing of the center of blur correction only in the first direction.

4. An image blur correction apparatus according to claim 1 or 2, wherein said image pickup apparatus is a camera capable of interchanging the lens thereof.

5. An image blur correction apparatus according to claim 1 or 2, wherein said control means is a microcomputer.

6. A lens barrel having the image blur correction apparatus of claim 1 or 2.

2. An image blur correction apparatus comprising:

vibration detecting means for detecting vibration of an image pickup apparatus;

correction means for correcting image blur attributable to the vibration;

a plurality of resilient members for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the amount of changing of the correction center of the drive of said correction means in conformity with an exposure time of the image pickup apparatus.

7. An image pickup apparatus having an image blur correction apparatus, comprising:

an image pickup optical system;

vibration detecting means for detecting vibration of said image pickup apparatus;

correction means having in said image pickup optical system an optical system for correcting image blur attributable to the vibration;

a resilient member for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the correction center of the drive of said correction means when an exposure time of said image pickup apparatus is shorter than a predetermined time.

9. An image pickup apparatus according to claim 7 or 8, wherein said correction means is movable in a first direction and a second direction differing from the first direction, and said control means drive-controls said correction means so as to effect the changing of the center of blur correction only in said first direction.

10. An image pickup apparatus according to claim 7 or 8, which is a camera system capable of interchanging the lens thereof.

11. An image pickup apparatus according to claim 7 or 8, wherein said control means is a microcomputer.

8. An image pickup apparatus having an image blur correction apparatus, comprising:

an image pickup optical system;

vibration detecting means for detecting vibration of said image pickup apparatus;

correction means having in said image pickup optical system an optical system for correcting image blur attributable to the vibration;

a resilient member for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the amount of changing of the correction center of the drive of said correction means in conformity with an exposure time of said image pickup apparatus.

12. An image blur correction apparatus comprising:

vibration detecting means for detecting vibration of an image pickup apparatus;

correction means for correcting image blur attributable to the vibration;

a plurality of resilient members for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the correction center of the drive of said correction means when a focal length of an image pickup optical system of the image pickup apparatus is greater than or equal to a predetermined value.

14. An image blur correction apparatus according to claim 12 or 13, wherein said correction means is movable in a first direction and a second direction differing from the first direction, and said control means drive-controls said vibration correcting means so as to effect the changing of the center of the blur correction only in said first direction.

15. An image blur correction apparatus according to claim 12 or 13, wherein said image pickup apparatus is a camera system capable of interchanging the lens thereof.

16. An image blur correction apparatus according to claim 12 or 13, wherein said control means is a microcomputer.

13. An image blur correction apparatus comprising:

vibration detecting means for detecting vibration of an image pickup apparatus;

correction means for correcting image blur attributable to the vibration;

a plurality of resilient members for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the amount of changing of the drive of the correction center of said correction means correspondingly to a focal length of an image pickup optical system of the image pickup apparatus.

17. An image pickup apparatus having an image blur correction apparatus, comprising:

an image pickup optical system;

vibration detecting means for detecting vibration of said image pickup apparatus;

correction means having in said image pickup optical system an optical system for correcting image blur attributable to the vibration;

a resilient member for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means drive-controls so as to change the correction center of said correction means when a focal length of said image pickup optical system is greater than or equal to a predetermined value.

19. An image pickup apparatus according to claim 17 or 18, wherein said correction means is movable in a first direction and a second direction differing from the first direction, and said control means drive-controls said correction means so as to effect the changing of the center of the blur correction only in said first direction.

20. An image pickup apparatus according to claim 17 or 18, which is a camera system capable of interchanging the lens thereof.

21. An image pickup apparatus according to claim 17 or 18, wherein said control means is a microcomputer.

18. An image pickup apparatus having an image blur correction apparatus, comprising:

an image pickup optical system;

vibration detecting means for detecting vibration of said image pickup apparatus;

correction means having in said image pickup optical system an optical system for correcting image blur attributable to the vibration;

a resilient member for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the amount of changing of the drive of the correction center of said correction means correspondingly to a focal length of said image pickup optical system of said image pickup apparatus.

22. An image blur correction apparatus comprising:

vibration detecting means for detecting vibration of an image pickup apparatus;

correction means for correcting image blur attributable to the vibration;

a plurality of resilient members for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the correction center of the drive of said correction means in conformity with an exposure time of the image pickup apparatus and a focal length of an image pickup optical system of the image pickup apparatus.

23. An image blur correction apparatus comprising:

vibration detecting means for detecting vibration of an image pickup apparatus;

correction means for correcting image blur attributable to the vibration;

a plurality of resilient members for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration correcting means,

wherein said control means controls so as to change the amount of changing of the correction center of the drive of said correction means correspondingly to an exposure time of the image pickup apparatus and a focal length of an image pickup optical system of the image pickup apparatus.

24. An image pickup apparatus having an image blur correction apparatus, comprising:

an image pickup optical system;

vibration detecting means for detecting vibration of said image pickup apparatus;

correction means having in said image pickup optical system an optical system for correcting image blur attributable to the vibration;

a resilient member for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the amount of changing of the correction center of the drive of said correction means corresponding to an exposure time of said image pickup apparatus and a focal length of said image pickup optical system of said image pickup apparatus.

25. An image pickup apparatus having an image blur correction apparatus, comprising:

an image pickup optical system;

vibration detecting means for detecting vibration of said image pickup apparatus;

correction means having in said image pickup optical system an optical system for correcting image blur attributable to the vibration;

a resilient member for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the amount of changing of the correction center of the drive of said correction means correspondingly to an exposure time of said image pickup apparatus and a focal length of said image pickup optical system of said image pickup apparatus.

26. An interchangeable lens having an image blur correction apparatus, comprising:

an image pickup optical system;

discriminating means for discriminating the kind of an image pickup apparatus on which said interchangeable lens is mounted;

vibration detecting means for detecting vibration of said image pickup apparatus;

correction means having in said image pickup optical system an optical system for correcting image blur attributable to the vibration;

a resilient member for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the correction center of the drive of said correction means in conformity with the result of the discrimination by said discriminating means.

28. An interchangeable lens according to claim 26 or 27, wherein said control means further controls so as to change the correction center of the drive of said correction means in conformity with an exposure time of the image pickup apparatus or a focal length of said interchangeable lens.

29. An interchangeable lens according to claim 26 or 27, wherein said control means further controls so as to change the amount of changing of the correction center of the drive of said correction means in conformity with an exposure time of the image pickup apparatus or a focal length of said interchangeable lens.

27. An interchangeable lens having an image blur correction apparatus, comprising:

an image pickup optical system;

discriminating means for discriminating the kind of an image pickup apparatus on which said interchangeable lens is mounted;

vibration detecting means for detecting vibration of said image pickup apparatus;

correction means having an optical system forming a portion of said image pickup optical system for correcting image blur attributable to the vibration;

a resilient member for holding said correction means at the correction center of blur correction; and

control means for controlling a drive of said correction means on the basis of an output of said vibration detecting means,

wherein said control means controls so as to change the amount of changing of the correction center of the drive of said correction means in conformity with the result of the discrimination by said discriminating means.