Optical system vibro-isolating apparatus

Claim 1

An apparatus for vibro-isolating an optical system, comprising: acceleration sensor means for detecting an acceleration generated upon a vibration of said optical system and for generating an acceleration signal; absolute value means for receiving the acceleration signal output from said acceleration sensor means, obtaining an absolute value of the acceleration signal, and outputting an absolute value signal; oscillating means for receiving the absolute value signal output from said absolute value means, and outputting an oscillation signal having a frequency corresponding to the absolute value signal so that the frequency is high when the absolute value signal is large and the frequency is low when the absolute value signal is small; an up/down counter for receiving the oscillation signal output from said oscillating means, counting the oscillation signal, and outputting a count value; a motor for driving said optical system in a direction to cancel the vibration of said optical system; motor control means for receiving the count value output from said up/down counter and controlling said motor at a speed corresponding to the count value; detecting means for detecting a speed of said motor driven by said motor control means and for outputting a motor speed signal; integrating means for receiving the acceleration signal output from said acceleration sensor means, integrating the acceleration signal, and outputting a vibration speed signal; and comparator mean for receiving the motor speed signal output from said detecting means and the vibration speed signal output from said integrating means, comparing the motor speed signal with the vibration speed signal, and outputting a control signal for switching between count-up and count-down operations of said up/down counter in accordance with a comparison result.

Claim 2

An apparatus for vibro-isolating an optical system, comprising: acceleration sensor means for detecting an acceleration generated upon a vibration of said optical system and for generating an acceleration signal; absolute value means for receiving the acceleration signal output from said acceleration sensor means, obtaining an absolute value of the acceleration signal, and outputting an absolute value signal; oscillating means for receiving the absolute value signal output from said absolute value means, and outputting an oscillation signal having a frequency corresponding to the absolute value signal so that the frequency is high when the absolute value signal is large and the frequency is low when the absolute value signal is small; an up/down counter for receiving the oscillation signal output from said oscillating means, counting the oscillation signal, and outputting a count value; a motor for driving said optical system in a direction to cancel the vibration of said optical system; motor control means for receiving the count value output from said up/down counter and controlling said motor at a speed corresponding to the count value; detecting means for detecting a speed of said motor driven by said motor control means and for outputting a motor speed signal; integrating means for receiving the acceleration signal output from said acceleration sensor means, integrating the acceleration signal, and outputting a vibration speed signal; and comparator mean for receiving the motor speed signal output from said detecting means and the vibration speed signal output from said integrating means, comparing the motor speed signal with the vibration speed signal, and outputting a control signal for switching between count-up and count-down operations of said up/down counter in accordance with a comparison result.

Claim 6

An apparatus for vibro-isolating an optical system, comprising: acceleration sensor means for detecting an acceleration generated upon a vibration of said optical system and for generating an acceleration signal; absolute value means for receiving the acceleration signal output from said acceleration sensor means, obtaining an absolute value of the acceleration signal, and outputting an absolute value signal; oscillating means, having at least a first oscillator oscillated at a first frequency and a second oscillator oscillated at a second frequency lower than the first frequency, for receiving the absolute value signal output from said absolute value means, selecting said first oscillator when the absolute value signal is larger than a predetermined magnitude, selecting said second oscillator when the absolute value signal is smaller than the predetermined magnitude, and outputting the oscillation signal of the selected one of said first and second oscillators; an up/down counter for receiving the oscillation signal output from said oscillating means, counting the oscillation signal, and outputting a count value; a motor for driving said optical system in a direction to cancel the vibration of said optical system; motor control means for receiving the count value output from said up/down counter and controlling said motor at a speed corresponding to the count value; detecting means for detecting a speed of said motor driven by said motor control means and for outputting a motor speed signal; integrating means for receiving the acceleration signal output from said acceleration sensor means, integrating the acceleration signal, and outputting a vibration speed signal; and comparator means for receiving the motor speed signal output from said detecting means and the vibration speed signal output from said integrating means, comparing the motor speed signal with the vibration speed signal, and outputting a control signal for switching between count-up and count-down operations of said up/down counter in accordance with a comparison result.

Claim 7

An apparatus for vibro-isolating an optical system, comprising: acceleration sensor means for detecting an acceleration generated upon a vibration of said optical system and for generating an acceleration signal; absolute value means for receiving the acceleration signal output from said acceleration sensor means, obtaining an absolute value of the acceleration signal, and outputting an absolute value signal; oscillating means, having at least a first oscillator oscillated at a first frequency and a second oscillator oscillated at a second frequency lower than the first frequency, for receiving the absolute value signal output from said absolute value means, selecting said first oscillator when the absolute value signal is larger than a predetermined magnitude, selecting said second oscillator when the absolute value signal is smaller than the predetermined magnitude, and outputting the oscillation signal of the selected one of said first and second oscillators; an up/down counter for receiving the oscillation signal output from said oscillating means, counting the oscillation signal, and outputting a count value; a motor for driving said optical system in a direction to cancel the vibration of said optical system; motor control means for receiving the count value output from said up/down counter and controlling said motor at a speed corresponding to the count value; detecting means for detecting a speed of said motor driven by said motor control means and for outputting a motor speed signal; integrating means for receiving the acceleration signal output from said acceleration sensor means, integrating the acceleration signal, and outputting a vibration speed signal; and comparator means for receiving the motor speed signal output from said detecting means and the vibration speed signal output from said integrating means, comparing the motor speed signal with the vibration speed signal, and outputting a control signal for switching between count-up and count-down operations of said up/down counter in accordance with a comparison result.

Claim 11

An apparatus for vibro-isolating an optical system, comprising: acceleration detecting means for detecting an acceleration of a vibration of said optical system; oscillating means for oscillating a signal at a frequency corresponding to the acceleration detected by said acceleration detecting means; a counter for counting oscillation operations of said oscillating means; and motor control means for controlling, at a speed corresponding to a count value of said counter, a motor for driving said optical system in a direction to cancel the vibration of said optical system.

Claim 12

An apparatus for vibro-isolating an optical system, comprising: acceleration detecting means for detecting an acceleration of a vibration of said optical system; oscillating means for oscillating a signal at a frequency corresponding to the acceleration detected by said acceleration detecting means; a counter for counting oscillation operations of said oscillating means; and motor control means for controlling, at a speed corresponding to a count value of said counter, a motor for driving said optical system in a direction to cancel the vibration of said optical system.

Claim 13

An apparatus for vibro-isolating an optical system, comprising: an optical system capable of being driven to cancel a vibration thereof; driving means for driving said optical system by a motor; motor speed detecting means for detecting an operating speed of said motor; a sensor for detecting an acceleration of the vibration of the optical system; vibration speed detecting means for integrating an acceleration signal output from said sensor to obtain the vibration speed; comparing means for comparing the operating speed of said motor detected by said motor speed detecting means with the vibration speed obtained by said vibration speed detecting means; clock generating means for generating a clock having a frequency corresponding to an absolute value of the acceleration signal output from said sensor; an up/down counter for determining a count direction in accordance with a comparison result of said comparing means and counting the clocks generated by said clock generating means; and control signal output means for supplying the motor drive control signal to said driving means on the basis of the count value of said up/down counter.

Claim 14

An apparatus for vibro-isolating an optical system, comprising: an optical system capable of being driven to cancel a vibration thereof; driving means for driving said optical system by a motor; motor speed detecting means for detecting an operating speed of said motor; a sensor for detecting an acceleration of the vibration of the optical system; vibration speed detecting means for integrating an acceleration signal output from said sensor to obtain the vibration speed; comparing means for comparing the operating speed of said motor detected by said motor speed detecting means with the vibration speed obtained by said vibration speed detecting means; clock generating means for generating a clock having a frequency corresponding to an absolute value of the acceleration signal output from said sensor; an up/down counter for determining a count direction in accordance with a comparison result of said comparing means and counting the clocks generated by said clock generating means; and control signal output means for supplying the motor drive control signal to said driving means on the basis of the count value of said up/down counter.

Claim 17

An apparatus for vibro-isolating an optical system, comprising: vibration speed signal output means for detecting a vibration speed signal of said optical system and outputting the vibration speed signal; control means for outputting an actuator drive control signal to prevent a vibration of said optical system on the basis of the vibration speed signal output from said vibration speed signal output means; zero speed detecting means for receiving the vibration speed signal output from said vibration speed signal output means, detecting that the vibration speed signal becomes zero, and outputting the zero speed signal; and vibro-isolating ON/OFF control means for outputting the vibro-isolating signal for driving said control means in response to the first zero speed signal output from said zero speed detecting means after reception of a vibro-isolating ON signal for vibro-isolating said optical system.

Claim 18

An apparatus for vibro-isolating an optical system, comprising: vibration speed signal output means for detecting a vibration speed signal of said optical system and outputting the vibration speed signal; control means for outputting an actuator drive control signal to prevent a vibration of said optical system on the basis of the vibration speed signal output from said vibration speed signal output means; zero speed detecting means for receiving the vibration speed signal output from said vibration speed signal output means, detecting that the vibration speed signal becomes zero, and outputting the zero speed signal; and vibro-isolating ON/OFF control means for outputting the vibro-isolating signal for driving said control means in response to the first zero speed signal output from said zero speed detecting means after reception of a vibro-isolating ON signal for vibro-isolating said optical system.

Claim 24

An apparatus for vibro-isolating an optical system, comprising: vibro-isolating ON signal generating means for generating a vibro-isolating ON signal for vibro-isolating said optical system; vibration speed detecting means for detecting a vibration speed of said optical system and outputting a vibration speed signal; vibro-isolating operation start signal generating means for outputting a vibro-isolating operation start signal when the vibration speed signal output from said vibration speed detecting mean becomes zero after the vibro-isolating ON signal is output from said vibro-isolating ON signal generating means; an actuator for driving said optical system in a direction to cancel the vibration of said optical system; and control means for outputting a control signal for controlling said actuator, in response to the vibro-isolating operation start signal output from said vibro-isolating operation start signal generating means.

Claim 25

An apparatus for vibro-isolating an optical system, comprising: vibro-isolating ON signal generating means for generating a vibro-isolating ON signal for vibro-isolating said optical system; vibration speed detecting means for detecting a vibration speed of said optical system and outputting a vibration speed signal; vibro-isolating operation start signal generating means for outputting a vibro-isolating operation start signal when the vibration speed signal output from said vibration speed detecting mean becomes zero after the vibro-isolating ON signal is output from said vibro-isolating ON signal generating means; an actuator for driving said optical system in a direction to cancel the vibration of said optical system; and control means for outputting a control signal for controlling said actuator, in response to the vibro-isolating operation start signal output from said vibro-isolating operation start signal generating means.

Claim 34

An apparatus for vibro-isolating an optical system in a camera, comprising: a sensor for detecting a vibration of said optical system; an actuator for driving said optical system in a direction to cancel the vibration; control means for receiving an output from said sensor and outputting a control signal to said actuator to cancel the vibration; and reset means for driving said optical system by means of said actuator to a substantially intermediate position with a drive enable range in response to a vibro-insulating OFF control signal output at an end of a photographic operation.

Claim 35

An apparatus for vibro-isolating an optical system in a camera, comprising: a sensor for detecting a vibration of said optical system; an actuator for driving said optical system in a direction to cancel the vibration; control means for receiving an output from said sensor and outputting a control signal to said actuator to cancel the vibration; and reset means for driving said optical system by means of said actuator to a substantially intermediate position with a drive enable range in response to a vibro-insulating OFF control signal output at an end of a photographic operation.

Claim 42

An apparatus for vibro-isolating an optical system, comprising: a sensor for detecting an acceleration of a vibration of said optical system; an actuator for driving aid optical system in a direction to cancel the vibration; control means for receiving an output from said sensor and outputting a control signal to cancel the vibration; speed detecting means for outputting a speed signal on the basis of an output from said sensor; timing means for detecting a timing at which the speed signal output from said speed detecting means becomes zero, and for outputting a timing signal; and reset means for returning said optical system to a substantially intermediate position within a drive enable range, and wherein said control means starts a control operation for said actuator on the basis of an output from aid sensor in response to the timing signal from said timing means upon reception of the vibro-isolating ON signal, and actuates said reset means upon reception of the vibro-isolating OFF signal.

Claim 43

An apparatus for vibro-isolating an optical system, comprising: a sensor for detecting an acceleration of a vibration of said optical system; an actuator for driving aid optical system in a direction to cancel the vibration; control means for receiving an output from said sensor and outputting a control signal to cancel the vibration; speed detecting means for outputting a speed signal on the basis of an output from said sensor; timing means for detecting a timing at which the speed signal output from said speed detecting means becomes zero, and for outputting a timing signal; and reset means for returning said optical system to a substantially intermediate position within a drive enable range, and wherein said control means starts a control operation for said actuator on the basis of an output from aid sensor in response to the timing signal from said timing means upon reception of the vibro-isolating ON signal, and actuates said reset means upon reception of the vibro-isolating OFF signal.