Image blur prevention apparatus

An image blur prevention apparatus includes a movable member (e.g., a correction optical system) which moves for image blur prevention, a holding device (e.g., a locking member for holding the correction optical system) which holds the movable member, the holding device being changeable between a state in which a predetermined holding operation is performed and a state in which the predetermined holding operation is not performed, an operating device which operates the movable member for image blur prevention (e.g., operates the correction optical system in accordance with an image blur signal) at a predetermined position as a control center position (e.g., a position at which the optical axis of the correction optical system matches another optical axis), and a control device which controls movement of the movable member between the position at which it is held by the holding device and the predetermined position, and which controls a process of the movement between the holding position and the predetermined position.

Skip to:  ·  Claims  ·  References Cited  · Patent History  ·  Patent History

Claims

1. An image blur prevention apparatus comprising:

a movable member which moves for image blur prevention;
a holding device which holds said movable members, said holding device being changeable between a state in which a predetermined holding operation is performed and a state in which the predetermined holding operation is not performed;
an operating device which operates said movable member for image blur prevention at a predetermined position as a control center position; and
a control device which controls movement of said movable member between a holding position of said holding device and the predetermined position, said control device controlling a process of the movement between the holding position and the predetermined position.

2. An image blur prevention apparatus according to claim 1, wherein said control device includes means for controlling a position of said movable member during a process by which said movable member is moved between the holding position and the predetermined position.

3. An image blur prevention apparatus according to claim 1, wherein said control device includes means for controlling, step by step, the movement of said movable member when said movable member is to be moved between the holding position and the predetermined position.

4. An image blur prevention apparatus according to claim 1, wherein said operation device includes means for operating said movable member in accordance with an image blur state.

5. An image blur prevention apparatus according to claim 4, wherein said operation device includes means for operating said movable member in accordance with a signal that corresponds to the image blur state.

6. An image blur prevention apparatus according to claim 4, wherein said operation device includes means for operating said movable member in accordance with the image blur state so that said movable member is positioned at the predetermined position when image blur does not occur.

7. An image blur prevention apparatus according to claim 1, wherein said holding device includes means for holding said movable member by a mechanical operation.

8. An image blur prevention apparatus according to claim 1, wherein said operation device includes means for operating said movable member by using a movable range center position of said movable member as the control center position.

9. An image blur prevention apparatus according to claim 1, wherein said movable member includes an optical member.

10. An image blur prevention apparatus according to claim 9, wherein said operation device includes means for operating said movable member by employing a position at which an optical axis of said optical member substantially corresponds to an optical axis of another optical system as the control center position.

11. An image blur prevention apparatus according to claim 1, wherein said control device includes means for moving said movable member from the holding position to the predetermined position when said holding device releases the holding.

12. An image blur prevention apparatus according to claim 1, wherein said control device includes means for moving said movable member from the predetermined position to the holding position when said holding device starts the holding.

13. An apparatus adapted for an image blur prevention device that includes a movable member which moves for image blur prevention, a holding device which holds the movable member, the holding device being changeable between a state in which a predetermined holding operation is performed and a state in which the predetermined holding operation is not performed and an operation device which operates the movable member for image blur prevention at a predetermined position as a control center position, said apparatus comprising:

a control device which controls movement of the movable member between a holding position of the holding device and the predetermined position, said control device controlling a process of the movement between the holding position and the predetermined position.

14. An optical apparatus comprising:

a movable member which moves for image blur prevention;
a holding device which holds said movable member, said holding device being changeable between a state in which a predetermined holding operation is performed and a state in which the predetermined holding operation is not performed;
an operating device which operates said movable member for image blur prevention at a predetermined position as a control center position; and
a control device which controls movement of said movable member between a holding position of said holding device and the predetermined position, said control device controlling a process of the movement between the holding position and the predetermined position.

15. A camera comprising:

a movable member which moves for image blur prevention;
a holding device which holds said movable member, said holding device being changeable between a state in which a predetermined holding operation is performed and a state in which the predetermined holding operation is not performed;
an operating device which operates said movable member for image blur prevention at a predetermined position as a control center position; and
a control device which controls movement of said movable member between a holding position of said holding device and the predetermined position, said control device controlling a process of the movement between the holding position and the predetermined position.

16. An image blur prevention apparatus according to claim 1, wherein said holding device includes means for regulating the movement of said movable member so that said movable member is movable in a smaller range than the movable range for the image blur prevention.

17. An image blur prevention apparatus according to claim 1, wherein said holding device includes means for abutting a portion of said movable member to hold the movable member.

18. An image blur prevention apparatus comprising:

a movable member which moves for image blur prevention;
a holding device which holds said movable member, said holding device being changeable between a state in which a predetermined holding operation is performed and a state in which the predetermined holding operation is not performed;
an operating device which operates said movable member for image blur prevention at a predetermined position as a control center position; and
a control device which controls movement of said movable member between a holding position of said holding device and the predetermined position.
Referenced Cited
U.S. Patent Documents
4965619 October 23, 1990 Shikaumi et al.
5335032 August 2, 1994 Onuki et al.
Patent History
Patent number: 5781805
Type: Grant
Filed: Aug 15, 1996
Date of Patent: Jul 14, 1998
Inventor: Yasuhiko Shiomi (Tokyo)
Primary Examiner: W. B. Perkey
Application Number: 8/698,147
Classifications
Current U.S. Class: Having Stabilization System (396/55)
International Classification: G03B 500;