Patent ID: 8238740

Claim:
A light quantity adjustment apparatus comprising: a support plate comprising a first through hole through which light passes; a rotation plate comprising a second through hole corresponding to the first through hole and rotatably disposed with respect to the support plate; a plurality of 2D iris plates rotatably connected to the support plate so as to move between an open location in which the first through hole is completely opened and a closed location in which the first through hole is completely closed, the plurality of 2D iris plates engaged with the rotation plate and adjusting an open area of the first through hole according to a rotation of the rotation plate; two 3D iris plates each having one end rotatably connected to the support plate and another end engaged with the rotation plate, the two 3D iris plates moving between a retreat location away from the first through hole according to the rotation of the rotation plate and a photographing location where a first photographing hole and a second photographing hole are formed by covering a part of the first through hole; a shading plate that moves between an operating location where the first photographing hole or the second photographing hole is closed and a stop location away from the first through hole; and a shading plate driving unit that drives the shading plate.