LIGHT QUANTITY ADJUSTMENT DEVICE AND PORTABLE TERMINAL

To provide a light quantity adjustment device that can accurately adjust a quantity of light even when a diaphragm member moves in a direction orthogonal to an optical axis.SOLUTION: A light quantity adjustment device comprises: a base member 1 that has a light passage opening 1b; a lens holding member 2 that holds a lens through which light passes and is movable in a direction orthogonal to an optical axis of the light from a reference position; a diaphragm blade 9 that is attached to the lens holding member 2 and advances and retracts in the light passage opening 1b to form a diaphragm aperture; a drive lever 5 that is attached to the lens holding member 2, holds a magnet, and transmits driving force for driving the diaphragm blade 9; and a driving source that has a coil 7 arranged in the base member 1 opposite to the magnet 6 and generates driving force. When the light quantity adjustment device energizes the coil 7 to move the drive lever 5, the light quantity adjustment device corrects an amount of movement of the drive lever 5 according to an amount of movement of the lens holding member 2 from the reference position.SELECTED DRAWING: Figure 9 【課題】絞り部材が光軸と直交する方向に移動した場合においても、光量を精度よく調整することができる光量調節装置を提供する。【解決手段】光通過開口１ｂを有するベース部材１と、光が通過するレンズを保持し、基準位置から光の光軸と直交する方向に移動可能なレンズ保持部材２と、レンズ保持部材２に取り付けられ、光通過開口１ｂ内に進退して絞り開口を形成する絞り羽根９と、レンズ保持部材２に取り付けられると共に、マグネットを保持し絞り羽根９を駆動する駆動力を伝達する駆動レバー５と、マグネット６と対向してベース部材１に配置されたコイル７を有し、駆動力を発生する駆動源とを備え、コイル７に通電して駆動レバー５を移動させる際に、レンズ保持部材２における基準位置からの移動量に応じて駆動レバー５の移動量を補正することを特徴とする。【選択図】図９