Photography – Camera shake sensing – With accelerometer
Patent
1998-09-30
1999-11-02
Perkey, W. B.
Photography
Camera shake sensing
With accelerometer
396 55, G03B 1700, G02B 2764
Patent
active
059786000
ABSTRACT:
A motion compensation device having a motion compensation lens which moves to compensate for motion caused by, e.g, hand shake, to prevent blur of an image formed on an image forming plane. An actuator drives the motion compensation lens and when the motion compensation lens moves, a drive current flows in a coil of the actuator. A drive current measuring device measures the drive current. An ideal drive current calculating unit calculates an ideal drive current when the motion compensation lens receives no acceleration. The ideal drive current calculating unit includes a virtual actuator. The virtual actuator is a model of an actuator which behaves similarly to the actual actuator. The ideal drive current calculating unit calculates the ideal drive current for the state in which there is no acceleration caused by hand shake. A position instruction value calculating unit finds a value proportional to the hand shake acceleration by comparing the drive current measured by the drive current measuring device with the ideal drive current calculated by the ideal drive current calculating unit. The position instruction value calculating unit calculates a drive amount (target position signal) of the motion compensation lens which is necessary in order to compensate the motion.
REFERENCES:
patent: 5095198 (1992-03-01), Nakazawa et al.
patent: 5652918 (1997-07-01), Usui
Takeuchi Hiroshi
Usui Kazutoshi
Nikon Corporation
Perkey W. B.
LandOfFree
Motion compensation device to compensate for motion of an optica does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motion compensation device to compensate for motion of an optica, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motion compensation device to compensate for motion of an optica will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2147791