Shake compensation device for optical devices using a mirror to compensate for the shake
A shake compensating device for optical devices includes an optical system for forming an image of an object; a reflecting surface placed in the optical path of the optical system, a first substrate having a first electrode, placed adjacent to the reflecting surface; a second substrate fixed to an optical device, placed opposite to the first substrate and having a second electrode at a position opposite to the first electrode; a voltage control circuit for applying voltages across the first electrode and the second electrode, one of which is divided into a plurality of electrodes; and a detecting unit for detecting the shake angle of the optical device. In this case, the voltage control circuit controls the voltages applied across the divided electrodes and the other electrode opposite thereto in accordance with the output of the detecting unit.
1. A shake compensating device for a camera comprising:
a photographic lens for forming an image of an object;
a reflecting surface placed at an angle with an optical axis of the photographic lens on an object side in reference to the photographic lens, thereby reflecting light to the photographic lens;
a first substrate having a first electrode, parallel to the reflecting surface;
a second substrate fixed to a camera body, placed opposite to the first substrate and having a second electrode at a position opposite to the first electrode;
resilient members supporting the first substrate to the second substrate, displaceable in a vertical direction of the second substrate;
a voltage control circuit for applying voltages across a plurality of electrode segments into which one of the first electrode and the second electrode is segmented and a remaining electrode opposite to the electrode segments; and
a detecting device for detecting a shake angle of the camera,
the voltage control circuit controlling the voltages applied across the electrode segments and the remaining electrode opposite to the electrode segments in accordance with an output of the detecting device,
wherein one of the first electrode and the second electrode, segmented into the plurality of electrode segments, has a first pair of electrode segments symmetrical with respect to a first plane passing through an optical axis of the photographic lens and normal to the reflecting surface and a second pair of electrode segments symmetrical with respect to a second plane normal to the first plane and passing through a point of intersection of the optical axis of the photographic lens and the reflecting surface, and the voltage control circuit controls a tilt of the reflecting surface in a first direction by a difference between voltages applied across the remaining electrode, which is nonsegmented, of the first electrode and the second electrode and the first pair of electrode segments and in a second direction by a difference between voltages applied across the remaining electrode which is nonsegmented and the second pair of electrode segments.
2. A shake compensating device for an electronic imaging apparatus, comprising:
a photographic lens for forming an image of an object;
a reflecting surface placed at an angle with an optical axis of the photographic lens on an object side in reference to the photographic lens, thereby reflecting light to the photographic lens;
a first substrate having a first electrode, parallel to the reflecting surface;
a second substrate fixed to a body of the electronic imaging apparatus, placed opposite to the first substrate and having a second electrode at a position opposite to the first electrode;
resilient members supporting the first substrate to the second substrate, displaceable in a vertical direction of the second substrate;
a voltage control circuit for applying voltages across a plurality of electrode segments into which one of the first electrode and the second electrode is segmented and a remaining electrode opposite to the electrode segments; and
a detecting device for detecting a shake angle of the electronic imaging apparatus,
the voltage control circuit controlling the voltages applied across the electrode segments and the remaining electrode opposite to the electrode segments in accordance with an output of the detecting device,
wherein one of the first electrode and the second electrode, segmented into the plurality of electrode segments, has a first pair of electrode segments symmetrical with respect to a first plane passing through an optical axis of the photographic lens and normal to the reflecting surface and a second pair of electrode segments symmetrical with respect to a second plane normal to the first plane and passing through a point of intersection of the optical axis of the photographic lens and the reflecting surface, and the voltage control circuit controls a tilt of the reflecting surface in a first direction by a difference between voltages applied across the remaining electrode, which is nonsegmented, of the first electrode and the second electrode and the first pair of electrode segments and in a second direction by a difference between voltages applied across the remaining electrode which is nonsegmented and the second pair of electrode segments.
3. A shake compensating device for an electronic imaging apparatus, comprising:
a photographic lens for forming an image of an object;
a reflecting surface placed at an angle with an optical axis of the photographic lens on an object side in reference to the photographic lens, thereby reflecting light to the photographic lens;
a first substrate having a first electrode, parallel to the reflecting surface;
a second substrate fixed to a body of the electronic imaging apparatus, placed opposite to the first substrate and having a second electrode at a position opposite to the first electrode;
a voltage control circuit for applying voltages across a plurality of electrode segments into which one of the first electrode and the second electrode is segmented and a remaining electrode opposite to the electrode segments; and
a detecting device for detecting a shake angle of the electronic imaging apparatus,
the voltage control circuit controlling the voltages applied across the electrode segments and the remaining electrode opposite to the electrode segments in accordance with an output of the detecting device,
wherein one of the first electrode and the second electrode, segmented into the plurality of electrode segments, has a first pair of electrode segments symmetrical with respect to a first plane passing through an optical axis of the photographic lens and normal to the reflecting surface and a second pair of electrode segments symmetrical with respect to a second plane normal to the first plane and passing through a point of intersection of the optical axis of the photographic lens and the reflecting surface, and the voltage control circuit controls a tilt of the reflecting surface in a first direction by a difference between voltages applied across the remaining electrode, which is nonsegmented, of the first electrode and the second electrode and the first pair of electrode segments and in a second direction by a difference between voltages applied across the remaining electrode which is nonsegmented and the second pair of electrode segments.
4. A shake compensating device for a digital camera, comprising:
a photographic lens for forming an image of an object;
a reflecting surface placed at an angle with an optical axis of the photographic lens on an object side in reference to the photographic lens, thereby reflecting light to the photographic lens;
a first substrate having a first electrode, parallel to the reflecting surface;
a second substrate fixed to a body of the digital camera, placed opposite to the first substrate and having a second electrode at a position opposite to the first electrode;
resilient members supporting the first substrate to the second substrate, displaceable in a vertical direction of the second substrate;
a voltage control circuit for applying voltages across a plurality of electrode segments into which one of the first electrode and the second electrode is segmented and a remaining electrode opposite to the electrode segments; and
a detecting device for detecting a shake angle of the digital camera,
the voltage control circuit controlling the voltages applied across the electrode segments and the remaining electrode opposite to the electrode segments in accordance with an output of the detecting device,
wherein one of the first electrode and the second electrode, segmented into the plurality of electrode segments, has a first pair of electrode segments symmetrical with respect to a first plane passing through an optical axis of the photographic lens and normal to the reflecting surface and a second pair of electrode segments symmetrical with respect to a second plane normal to the first plane and passing through a point of intersection of the optical axis of the photographic lens and the reflecting surface, and the voltage control circuit controls a tilt of the reflecting surface in a first direction by a difference between voltages applied across the remaining electrode, which is nonsegmented, of the first electrode and the second electrode and the first pair of electrode segments and in a second direction by a difference between voltages applied across the remaining electrode which is nonsegmented and the second pair of electrode segments.