Abstract:
A lens barrel capable of achieving a smooth zoom operation and reducing a driving load at the time of barrel retraction. The lens barrel includes a rectilinear guide cylinder rectilinearly moving in an optical axis direction, and a movable cam cylinder moving in the optical axis direction while rotating relative to the guide cylinder. The guide cylinder is formed at its inner peripheral surface with a cam groove and a rectilinear guide groove that divides the cam groove at a boundary between a retracted region and a photographing region, and is formed with a penetration cam groove extending from the inner peripheral surface to an outer peripheral surface of the guide cylinder. The movable cam cylinder moves in the photographing region while the first pin engages the cam groove, and moves in the retracted region while the second pin engages the penetration cam groove.
Abstract:
A lens barrel capable of achieving a smooth zoom operation and reducing a driving load at the time of barrel retraction. The lens barrel includes a rectilinear guide cylinder rectilinearly moving in an optical axis direction, and a movable cam cylinder moving in the optical axis direction while rotating relative to the guide cylinder. The guide cylinder is formed at its inner peripheral surface with a cam groove and a rectilinear guide groove that divides the cam groove at a boundary between a retracted region and a photographing region, and is formed with a penetration cam groove extending from the inner peripheral surface to an outer peripheral surface of the guide cylinder. The movable cam cylinder moves in the photographing region while the first pin engages the cam groove, and moves in the retracted region while the second pin engages the penetration cam groove.
Abstract:
A collapsible-type lens barrel includes an image blurring correction unit that drives a first lens in a plane orthogonal to an optical axis so as to cancel shaking of an image sensing apparatus, and a second lens placed adjacent the image blurring correction unit. When the collapsible-type lens barrel is in the collapsed state, the image blurring correction unit causes the first lens to withdraw to a position away from the optical axis of the second lens, and causes the second lens to retract in such a manner that a portion of the second lens enters at least part of a space on the optical axis produced by the withdrawal of the first lens.
Abstract:
A lens barrel which can be extended over a larger amount without increasing the length of the lens barrel in a collapsed state. A movable barrel having a cam formed on an inner periphery thereof is movable in an optical axis direction. The movable barrel is extended toward an object in a shooting state, and is housed in a collapsed state. A lens holding frame holds a first lens group disposed closest to an object side of lens groups arranged in the optical axis direction. The lens holding frame including a fitting portion for slidably fitting to the cam is capable of moving in the optical axis direction, following a profile line of the cam. Barrier blades are disposed on the object side of the first lens group. A barrier drive ring is connected to the lens holding frame is rotatable to open and close the barrier blades.
Abstract:
A lens barrel which can be extended over a larger amount without increasing the length of the lens barrel in a collapsed state. A movable barrel having a cam formed on an inner periphery thereof is movable in an optical axis direction. The movable barrel is extended toward an object in a shooting state, and is housed in a collapsed state. A lens holding frame holds a first lens group disposed closest to an object side of lens groups arranged in the optical axis direction. The lens holding frame including a fitting portion for slidably fitting to the cam is capable of moving in the optical axis direction, following a profile line of the cam. Barrier blades are disposed on the object side of the first lens group. A barrier drive ring is connected to the lens holding frame is rotatable to open and close the barrier blades.
Abstract:
A collapsible-type lens barrel includes an image blurring correction unit that drives a first lens in a plane orthogonal to an optical axis so as to cancel shaking of an image sensing apparatus, and a second lens placed adjacent the image blurring correction unit. When the collapsible-type lens barrel is in the collapsed state, the image blurring correction unit causes the first lens to withdraw to a position away from the optical axis of the second lens, and causes the second lens to retract in such a manner that a portion of the second lens enters at least part of a space on the optical axis produced by the withdrawal of the first lens.