Patent ID: 9030763
Filing Date: 2015-05-12
Classification: G02B

Abstract:
1. A lens device for an imaging device having a imaging-lens and an aperture stop device that adjusts an aperture area, the lens device comprising: a lens barrel that houses the imaging-lens and the aperture stop device; a first operation ring on an outer circumferential portion of the lens barrel at a desired position and that is rotatable in a circumferential direction of the outer circumferential portion about an axis line of the lens barrel as a rotation axis in order to adjust the aperture area of the aperture stop device; a second operation ring in parallel with the first operation ring and that is rotatable in the circumferential direction of the outer circumferential portion about the axis line of the lens barrel as the rotation axis in order to adjust a transmittance of a variable light transmission filter; and a mechanism section that switches between an engagement state of the first operation ring and the second operation ring in which rotation of the first operation ring and the second operation ring are transferred to each other, and a non-engagement state of the first operation ring and the second operation ring in which the transfer of the rotation is blocked, wherein a rotation direction, in which the aperture area of the aperture stop device is increased by the first operation ring, is the same as a rotation direction in which the transmittance of the variable light transmission filter is increased by the second operation ring, and wherein the mechanism section is configured to convert the rotations of the first operation ring and the second operation ring into rotations in directions the same as each other or directions opposite to each other.