Optical apparatus, image stabilization device, lens barrel, and image pickup apparatus

An image stabilization apparatus comprising:

• an optical apparatus comprising:
• lens groups that are arranged on an optical axis to be movable along the optical axis;
• a first shaft that is arranged in parallel to the optical axis and that has a fitting part fit in a predetermined lens group among the lens groups and a first fixing part;
• and
• a support member that rotatably supports the first shaft by holding the first fixing part;
• and
• a drive unit configured to move the predetermined lens group in a plane that intersects perpendicularly with the optical axis in the state where the predetermined lens group is in the image pickup position on the optical axis,
• wherein a center axis of the first fixing part and a center axis of the fitting part are eccentric,
• wherein the first shaft is supported by the support member to be rotatable around the center axis of the first fixing part, and
• wherein the predetermined lens group is movable between an image pickup position on the optical axis and a retreat position that is separated from the optical axis by rotating around the first shaft.

A lens barrel comprising:

• an optical apparatus comprising:
• lens groups that are arranged on an optical axis to be movable along the optical axis;
• a first shaft that is arranged in parallel to the optical axis and that has a fitting part fit in a predetermined lens group among the lens groups and a first fixing part;
• and
• a support member that rotatably supports the first shaft by holding the first fixing part,
• wherein a center axis of the first fixing part and a center axis of the fitting part are eccentric,
• wherein the first shaft is supported by the support member to be rotatable around the center axis of the first fixing part,
• wherein the predetermined lens group is movable between an image pickup position on the optical axis and a retreat position that is separated from the optical axis by rotating around the first shaft, and
• wherein the lens groups take in incident light and form an image at a predetermined position on the optical axis.

An image pickup apparatus comprising:

• an optical apparatus comprising:
• lens groups that are arranged on an optical axis to be movable along the optical axis;
• a first shaft that is arranged in parallel to the optical axis and that has a fitting part fit in a predetermined lens group among the lens groups and a first fixing part;
• and
• a support member that rotatably supports the first shaft by holding the first fixing part;
• and
• an image sensor;
• wherein a center axis of the first fixing part and a center axis of the fitting part are eccentric,
• wherein the first shaft is supported by the support member to be rotatable around the center axis of the first fixing part,
• wherein the predetermined lens group is movable between an image pickup position on the optical axis and a retreat position that is separated from the optical axis by rotating around the first shaft, and
• wherein the optical apparatus takes in incident light and forms an image on the image sensor.

An optical apparatus comprising:

• an optical element arranged to be movable between a predetermined position on an optical axis and a retreat position separated from the optical axis;
• a holding member that holds the optical element;
• a base member;
• a support member that rotatably holds the holding member and that is movable in a direction perpendicular to the optical axis with respect to the base member;
• and
• rolling members arranged between the base member and the support member,
• wherein the base member has an approaching part that approaches at least one part of the holding member in a direction of the optical axis in a state where the optical element is in the retreat position rather than a state where the optical element is in the predetermined position.

An optical apparatus comprising:

• an optical element arranged to be movable between a predetermined position on an optical axis and a retreat position separated from the optical axis;
• a holding member that holds the optical element;
• a base member;
• a support member that rotatably holds the holding member and that is movable in a direction perpendicular to the optical axis with respect to the base member;
• rolling members arranged between the base member and the support member;
• and
• a rolling support member arranged between the base member and the support member near the retreat position.

An image stabilization apparatus comprising:

• an optical apparatus comprising:
• an optical element arranged to be movable between a predetermined position on an optical axis and a retreat position separated from the optical axis;
• a holding member that holds the optical element;
• a base member;
• a support member that rotatably holds the holding member and that is movable in a direction perpendicular to the optical axis with respect to the base member;
• and
• rolling members arranged between the base member and the support member,
• wherein the base member has an approaching part that approaches at least one part of the holding member in a direction of the optical axis in a state where the optical element is in the retreat position rather than a state where the optical element is in the predetermined position, and
• wherein the optical element is an image stabilization lens that is movable in a plane that intersects perpendicularly with the optical axis.

A lens barrel comprising:

• an optical apparatus comprising:
• an optical element arranged to be movable between a predetermined position on an optical axis and a retreat position separated from the optical axis;
• a holding member that holds the optical element;
• a base member;
• a support member that rotatably holds the holding member and that is movable in a direction perpendicular to the optical axis with respect to the base member;
• and
• rolling members arranged between the base member and the support member,
• wherein the base member has an approaching part that approaches at least one part of the holding member in a direction of the optical axis in a state where the optical element is in the retreat position rather than a state where the optical element is in the predetermined position, and
• wherein the optical apparatus includes lens groups that take in incident light and form an image at a predetermined position on the optical axis.

An image pickup apparatus comprising:

• an optical apparatus comprising:
• an optical element arranged to be movable between a predetermined position on an optical axis and a retreat position separated from the optical axis;
• a holding member that holds the optical element;
• a base member;
• a support member that rotatably holds the holding member and that is movable in a direction perpendicular to the optical axis with respect to the base member;
• and
• rolling members arranged between the base member and the support member,
• an image sensor;
• wherein the base member has an approaching part that approaches at least one part of the holding member in a direction of the optical axis in a state where the optical element is in the retreat position rather than a state where the optical element is in the predetermined position, and
• wherein the optical apparatus takes in incident light and forms an image on the image sensor.

An optical apparatus comprising:

• an optical element arranged to be movable between a predetermined position on an optical axis and a retreat position separated from the optical axis;
• a light amount adjustment unit configured to adjust an incident light amount comprising:
• a frame that has a notch section in an outer periphery of the frame;
• diaphragm blades that are movably arranged in the frame;
• and
• a drive unit configured to drive the diaphragm blades,
• wherein a part of the optical element is stored in the notch section in a state where the optical element is in the retreat position.

An optical apparatus comprising:

• an optical element arranged to be movable along an optical axis;
• a drive unit configured to move the optical element along the optical axis;
• and
• a light amount adjustment unit configured to adjust an incident light amount comprising:
• a frame that has a notch section in an outer periphery of the frame;
• and
• diaphragm blades that are movably arranged in the frame,
• wherein a part of the drive unit is stored in the notch section by moving the optical element along the optical axis.

A lens barrel comprising:

• an optical apparatus comprising:
• an optical element arranged to be movable between a predetermined position on an optical axis and a retreat position separated from the optical axis;
• a light amount adjustment unit configured to adjust an incident light amount comprising:
• a frame that has a notch section in an outer periphery of the frame;
• diaphragm blades that are movably arranged in the frame;
• and
• a drive unit configured to drive the diaphragm blades,
• wherein a part of the optical element is stored in the notch section in a state where the optical element is in the retreat position, and
• Wherein the optical apparatus includes a lens that takes in incident light and forms an image at a predetermined position on the optical axis.

An image pickup apparatus comprising:

• an optical apparatus comprising:
• an optical element arranged to be movable between a predetermined position on an optical axis and a retreat position separated from the optical axis;
• a light amount adjustment unit configured to adjust an incident light amount comprising:
• a frame that has a notch section in an outer periphery of the frame;
• and
• diaphragm blades that are movably arranged in the frame;
• and
• a drive unit configured to drive the diaphragm blades;
• and
• an image sensor;
• wherein a part of the optical element is stored in the notch section in a state where the optical element is in the retreat position.
• wherein the optical apparatus takes in incident light and forms an image on the image sensor.