Abstract: A lens unit has an optical system having at least one lens, a lens holder supporting the optical system and a lens frame having a guide component. The guide component guides a movement of the lens holder in a first direction. The lens holder has a first portion and a second portion. The first portion is disposed slidably over the guide component. The second portion is disposed slidably over the guide component and disposed spaced apart from the first portion in the first direction. The guide component is sandwiched between the first portion and the second portion by an elastic force of the first portion and/or the second portion.

Abstract: A lens holding frame includes a plurality of conical protrusions. The plural conical protrusions include a pitch of greater than or equal to 0.1 mm and less than or equal to 2.0 mm.

Abstract: A liquid ejecting apparatus includes a piezoelectric element provided with a piezoelectric layer and an electrode provided on the piezoelectric layer; and a driving unit supplying a driving waveform driving the piezoelectric element to the piezoelectric element.

Abstract: An attachment structure is configured to attach a first member to a second member. The attachment structure includes a first engagement portion which is provided at one of the first member or the second member, and a second engagement portion which is provided at the other one of the first member or the second member and which engages with the first engagement portion at a predetermined attachment position to restrict a relative movement. One of the first member or the second member at which the second engagement portion is provided, is provided with spaces at both sides of the second engagement portion in the circumferential direction. The first member and the second member include a torque change portion which changes a torque such that the torque is larger at a preceding side and a succeeding side of the attachment position in the circumferential direction, than at the attachment position.

Abstract: A lens barrel includes a first support frame and a second support frame. The first support frame has a cam groove. The second support frame has an annular main body with a cam follower that extends outwardly in a radial direction. The cam follower is slidably disposed in the cam groove and has a first cam portion, a second cam portion and a connecting portion. The second cam portion is aligned with the first cam portion along the circumferential direction of the main body. The connecting portion connects the first cam portion and the second cam portion to create a space between the connecting portion and the cam groove.

Abstract: A lens barrel 111 according to the present invention includes: a lens group 220 which moves along an optical axis direction 300; and a lens holding frame 224 holding a lens group 220. A guide hole 406 is provided in the lens holding frame 224, the guide hole 406 being penetrated by a main shaft 440 having a circular cross section. A cross section of the guide hole 406 taken orthogonal to a longitudinal direction of the main shaft 440 includes at least two linear portions 406a, and the main shaft 440 is in contact with the two linear portions 406a.

Abstract: An attachment structure is configured to attach a first member to a second member. The attachment structure includes a first engagement portion which is provided at one of the first member or the second member, and a second engagement portion which is provided at the other one of the first member or the second member and which engages with the first engagement portion at a predetermined attachment position to restrict a relative movement. One of the first member or the second member at which the second engagement portion is provided, is provided with spaces at both sides of the second engagement portion in the circumferential direction. The first member and the second member include a torque change portion which changes a torque such that the torque is larger at a preceding side and a succeeding side of the attachment position in the circumferential direction, than at the attachment position.

Abstract: A 3D adapter comprises a left-eye optical system (OL), a right-eye optical system (OR), an adjusting mechanism, and an exterior casing. The exterior casing accommodates the left-eye optical system (OL) and the right-eye optical system (OR), and can be mounted to a video camera. The adjusting mechanism is provided to adjust the position of a left-eye optical image QL1 and/or a right-eye optical image QR1 with respect to a CMOS image sensor from the outside of the exterior casing.

Abstract: To produce a subject's image on an imager as accurately as possible, a technique that is effectively applicable to the process of assembling an optical system is provided. An imaging device includes: an imager; a plate member, to which the imager is attached; and a holding member configured to hold the plate member. The plate member has a first portion, through which at least one fixing hole has been cut, and a second portion, to which the imager is attached and through which at least one adjusting hole has been cut. The plate member is held by the holding member using a number of fastening members to be introduced through the at least one fixing hole and the at least one adjusting hole. When the first portion is fixed on the holding member, the fastening member that is introduced through the at least one adjusting hole adjusts the relative position of the second portion to the holding member.

Abstract: A lens unit has an optical system having at least one lens, a lens holder supporting the optical system and a lens frame having a guide component. The guide component guides a movement of the lens holder in a first direction. The lens holder has a first portion and a second portion. The first portion is disposed slidably over the guide component. The second portion is disposed slidably over the guide component and disposed spaced apart from the first portion in the first direction. The guide component is sandwiched between the first portion and the second portion by an elastic force of the first portion and/or the second portion.

Abstract: A lens unit has a lens frame configured to be mounted to an imaging device having an imaging element, a first optical system having a first optical axis supported by the lens frame, a second optical system having a second optical axis supported by the lens frame; and an adjustment mechanism configured to adjust a position of the first optical system and/or the second optical system in an optical axis direction with respect to the lens frame.

Abstract: A lens barrel 111 according to the present invention includes: a lens group 220 which moves along an optical axis direction 300; and a lens holding frame 224 holding a lens group 220. A guide hole 406 is provided in the lens holding frame 224, the guide hole 406 being penetrated by a main shaft 440 having a circular cross section. A cross section of the guide hole 406 taken orthogonal to a longitudinal direction of the main shaft 440 includes at least two linear portions 406a, and the main shaft 440 is in contact with the two linear portions 406a.

Abstract: A barrier unit, of which the cap edge is not easily deformed even under some external force, is provided. The barrier unit includes: a base, which defines a first window; a cap, which defines a second window and which is arranged so that the second window faces the first window; and at least one blade, which is arranged between the base and the cap so as to open or close with respect to the first and second windows. A surface of the cap that is opposed to the at least one blade has a notched portion around the second window.

Abstract: The present invention provides a barrier unit, of which the blades can be opened fully. The barrier unit is designed to be attached to a camera in order to protect the lens of the camera and is ready to open or close as needed. The barrier unit includes: a base with a cylindrical portion; a first ring, which is arranged so as to rotate around the cylindrical portion; and first and second blades, which are interlocked with the first ring and which are gradually opened and closed as the first ring rotates. When one of the first and second blades is fully opened, the first ring is further movable to turn the other blade in a closing direction.

Abstract: An image stabilizing device of the present invention includes: a correction lens holding member 405 to which a correction lens G3 included in an optical system of a camera is fixed; a holding member 408 that holds the correction lens holding member so that the correction lens holding member is movable in a rectilinear direction that is an arbitrary direction in a plane orthogonal to an optical axis A of light entering the correction lens G3 and in a rotation direction along an arc in the plane about a rotary shaft A3 substantially parallel to the optical axis A; a driving portion for rectilinear movement 412 that applies a driving force to the correction lens holding member 405 in order to drive the correction lens holding member 405 in the rectilinear direction; and a driving portion for rotation 413 that applies a driving force to the correction lens holding member 405 in order to drive the correction lens holding member 405 in the rotation direction.

Abstract: A piezoelectric body includes a perovskite type compound that is expressed by a compositional formula being Pb (Zrx Ti1-x)1-y My O3, where M is at least one of Ta and Nb, x is in a range of 0.51?x?0.57, and y is in a range of 0.05?y<0.2, wherein the perovskite type compound contains at least one of SiO2 and GeO2 as an additive, and the additive is added in an amount of 0.5 mol % or higher but 5 mol % or lower with respect to the amount of perovskite type compound.

Abstract: An image stabilizing device of the present invention includes: a correction lens holding member 405 to which a correction lens G3 included in an optical system of a camera is fixed; a lens holding member 408 that holds the correction lens holding member so that the correction lens holding member is movable in a rectilinear direction that is an arbitrary direction in a plane orthogonal to an optical axis A of light entering the correction lens G3 and in a rotation direction along an arc in the plane about a rotary shaft A3 substantially parallel to the optical axis A; a driving portion for rectilinear movement 412 that applies a driving force to the correction lens holding member 405 in order to drive the correction lens holding member 405 in the rectilinear direction; and a driving portion for rotation 413 that applies a driving force to the correction lens holding member 405 in order to drive the correction lens holding member 405 in the rotation direction.

Abstract: To produce a subject's image on an imager as accurately as possible, a technique that is effectively applicable to the process of assembling an optical system is provided. An imaging device includes: an imager; a plate member, to which the imager is attached; and a holding member configured to hold the plate member. The plate member has a first portion, through which at least one fixing hole has been cut, and a second portion, to which the imager is attached and through which at least one adjusting hole has been cut. The plate member is held by the holding member using a number of fastening members to be introduced through the at least one fixing hole and the at least one adjusting hole. When the first portion is fixed on the holding member, the fastening member that is introduced through the at least one adjusting hole adjusts the relative position of the second portion to the holding member.

Abstract: A thermoelectric module includes: a plurality of thermoelectric elements that is electrically series-connected via a plurality of electrodes; and a pair of substrates on which the plurality of electrodes are formed on facing surfaces of the pair of substrates, the pair of substrates being provided perpendicularly to a heat transfer direction with the plurality of thermoelectric elements being interposed. An electrode of an upper substrate includes a first electrode having a size enough to electrically connect the thermoelectric elements that are spaced apart from each other by a distance corresponding to an area equivalent to an adjacent pair of the thermoelectric elements. An electrode of a lower substrate is provided correspondingly to a maximum placement number of the thermoelectric elements interposed between the substrates, and also has a size enough to electrically connect the adjacent pair of the thermoelectric elements.

Abstract: A lens barrel includes a first support frame and a second support frame. The first support frame has a cam groove. The second support frame has an annular main body with a cam follower that extends outwardly in a radial direction. The cam follower is slidably disposed in the cam groove and has a first cam portion, a second cam portion and a connecting portion. The second cam portion is aligned with the first cam portion along the circumferential direction of the main body. The connecting portion connects the first cam portion and the second cam portion to create a space between the connecting portion and the cam groove.