US 6,389,228 B1 · Device for correcting a tremble of a focused image and a camera which is provided with the same

Abstract

A previous displacement of the optical axis along a horizontal axis (or a vertical axis) detected at a previous performance of the frequency judging routine and a present displacement of the optical axis detected at a present performance are compared. It is judged whether a focused image tremble successively faces toward one direction or the direction of the tremble is reversed, based on combination of the result of the comparison and a previous direction of the focused image tremble. If the direction is reversed, and the focused image tremble is not caused by a hand tremble, the correction of the focused image tremble is stopped. It is judged that the focused image tremble is not caused by the hand tremble, when an elapsed time from a previous reverse of the focused image tremble to a present reverse of the focused image tremble is less than 25 milliseconds, and the amplitude of the focused image tremble is larger than a threshold value.

Claims11

Dependent claims

A device for correcting a tremble of a focused image comprising:

a tremble detector that detects a tremble of optical axes of an optical device;
correction optical systems that correct said tremble of said optical axes;
driving devices that drive said correction optical systems;
a controlling system that controls said driving devices in such a manner that a tremble of a focused image of an object due to said tremble can be canceled;
a reverse detector that detects a reverse of a direction of said optical axes tremble, detection of said reverse detector being repeatedly performed at a predetermined time interval;
and
a measuring system that measures a time interval, from a previous moment at which said reverse was detected, to a present moment at which said reverse is detected;
wherein said controlling system stops said driving devices if said time interval is shorter than a predetermined value.

5 more elements

A camera which is provided with a device for correcting a tremble of a focused image comprising:

a photographing optical system;
a tremble detector that detects a tremble of an optical axis of said photographing optical system;
a correction optical system that corrects said tremble of said optical axis;
a driving device that drives said correction optical system;
a photographing controlling system that records an image of said object, controlling an image capturing operation;
a tremble correction controlling system that controls said driving device in such a manner that a tremble of a focused image of an object due to said tremble can be canceled;
a reverse detector that detects a reverse of a direction of said optical axis tremble, detection of said reverse detector being repeatedly performed at a predetermined time interval;
and
a measuring system that measures a time interval, from a previous moment at which said reverse was detected, to a present moment at which said reverse is detected;
wherein said tremble correction controlling system stops said driving device if said time interval is shorter than a predetermined value.

7 more elements

Dependencies are inferred from the claim text.

Device for correcting a tremble of a focused image and a camera which is provided with the same

Life of this patent

Device for correcting a tremble of a focused image and a camera which is provided with the same

Life of this patent

Abstract

Claims11