Nikon Corporation

Osamu Gomibuchi

Kenichi Kitano

Tsuneo Watanabe

Mizuki Wayu

Makoto Horikoshi

Takashi Kishimoto

Kosuke Machida

Ichiro Imaei

A lens barrel and an imaging device which can be miniaturized, the lens barrel with a movable cylinder that moves along the optical axis with a change in focal length; first and second drive units in the movable cylinder; and first and second lens driven by the first and second drive units respectively to move along the optical axis relative to the movable cylinder. The movement amount of the first lens relative to the cylinder when the focal length is changed to a second focal length from a first state where the first lens is at a position closest to a subject with a first focal length is less than the movement amount of the first lens relative to the cylinder when the focal length is changed to the second focal length from a second state where the first lens is closer to an image plane than the first state.

Lens barrel and imaging device

A zoom optical system includes a plurality of lens groups, and upon zooming distances between adjacent lens groups change. The zoom optical system has a focusing lens group that moves upon focusing and an image-side lens group disposed adjacent to an image side of the focusing lens group. The zoom optical system satisfies the conditional expression 0.000<dL0t/dL1t<1.000, where dL0t denotes a distance on an optical axis between the focusing lens group and the image-side lens group upon focusing on an infinity object in a telephoto end state, and dL1t denotes a distance on the optical axis between the focusing lens group and the image-side lens group upon focusing on a short-distance object in the telephoto end state.

Zoom optical system, optical apparatus and method for manufacturing the zoom optical system

A lightweight lens barrel that includes two focus lenses. The first lens holding frame for holding a first lens L, a first drive unit STMfor causing the first lens holding frame to move in the optical axis direction, a second lens holding frame for holding a second lens L, and a second drive unit STMfor causing the second lens holding frame to move in the optical axis direction, the first lens holding frame being arranged on an inner peripheral side of the second lens holding frame.

A lightweight lens barrel with two focus lenses; a first lens holding frame for holding a first lens, a first drive unit for causing the first lens holding frame to move in the optical axis direction, a second lens holding frame for holding a second lens, a second drive unit for causing the second lens holding frame to move in the optical axis direction, and a moving tube with the first driving unit and the second driving unit, and movable in the optical axis direction, wherein the first lens holding frame and the second lens holding frame are each movable in the optical axis direction with respect to the moving tube.

Growing community of inventors

Tokyo, Japan

Osamu Gomibuchi