| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the rising characteristic of a vibration proofing action by reducing the output fluctuation of a shake detection means by predicting it until prescribed time elapses after a power source is applied to the shake detection means. SOLUTION: An output from an angular velocity sensor 1 detecting shake is inputted to the A/D converter 6 of a microcomputer 5 through a low-pass filter 2, a high-pass filter 3 and an amplifier 4. As for a signal A/D-converted there, the fluctuation of the output is predicted by an output fluctuation prediction means 8 until the prescribed time elapses after the power source is applied. Thereafter, the A/D-converted signal is inputted to an output fluctuation reduction means 7 and converted to an angular displacement signal through a high- pass filter 9 and an integrator 10 after the fluctuation of the output thereof is canceled based on the predicted result. Then, the output of a position sensor 14 detecting the position of a correction lens is added in the reverse polarity and the feedback arithmetic operation thereof is executed. Besides, the signal is outputted to a coiled driver 12 from the output port of the microcomputer 5 as PWM. Then, the correction lens is driven so as to cancel image blurring.</p> |
