Photography – Camera shake sensing – Having stabilization system
Patent
1998-03-04
1999-08-03
Perkey, W. B.
Photography
Camera shake sensing
Having stabilization system
396135, G03B 1336, G03B 1700
Patent
active
059336617
ABSTRACT:
An optical apparatus having the image blur correcting function has control means for effecting first drive control for moving optical means to correct image vibration and second drive control for moving the optical means for focus adjustment, and varying means for effecting 1) to make the manner of the first control differ between a case where the first control is effected in parallel with the second control and a case where the first control is effected without the second control being effected in parallel (to change (lengthen) the execution cycle of image blur correction control to thereby prevent an image blur correction control routine from being repetitively executed), or 2) to make the manner of the second control differ between a case where the second control is effected in parallel with the first control and a case where the second control is effected without the first control being effected in parallel (specifically, to change the control characteristics of driving velocity (the deceleration characteristic during the movement to a target position and the deceleration starting timing) in the driving control of a focusing lens to thereby reduce the frequency of the driving control of the focusing lens), whereby image blur correction control and focusing control are to be executed at a time, one of these two control methods can be changed into a method in which the burden of the control means becomes lighter, and the performance of the both kinds of control can be maintained high by the use of a relatively inexpensive control means.
REFERENCES:
patent: Re35583 (1997-08-01), Hamada et al.
patent: 5761547 (1998-06-01), Hirano et al.
patent: 5805937 (1998-09-01), Kitagawa
Canon Kabushiki Kaisha
Perkey W. B.
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