JP2001075146A5

JP2001075146A5 -

Info

Publication number: JP2001075146A5
Application number: JP2000231366A
Authority: JP
Filing date: 2000-07-26
Publication date: 2004-12-24
Anticipated expiration: 2017-02-03

Description

【０００５】
【課題を解決するための手段】
本発明はこの様な問題点に鑑みてなされたものであり、シャッタ周辺を小型化でき、撮像素子の保護と液晶ファインダの表示を可能としながら電力消費の少ない撮像装置を提供することを目的とする。
要約すれば、本発明の請求項１に係る撮像装置は：入射光を所定の結像面に結像させる撮影光学系と：前記結像面に配置されている撮像手段と：露出開口を有していて該露出開口を前記入射光の光路中に配置している地板と：前記地板に回転可能に取り付けられており前記露出開口から待避している第１位置と前記露出開口に進入した第２位置との間で作動可能であって前記露出開口よりも小さな開口を形成する絞り羽根部材と：前記地板に回転可能に取り付けられており回転することによって前記露出開口から待避している第１位置と前記露出開口に進入した第２位置との間で作動させられるシャッタ羽根部材と：回転可能な磁石を有しており駆動電流が供給されたとき該磁石を旋回させて前記絞り羽根部材を前記第１位置と前記第２位置との間で作動させ、駆動電流が供給されないとき該磁石を旋回させない絞り羽根駆動手段と：回転可能な磁石を有しており駆動電流が供給されたとき該磁石を旋回させて前記シャッタ羽根部材を前記第１位置と前記第２位置との間で作動させ撮影の終了段階においては前記シャッタ羽根部材を前記第１位置から前記第２位置へ作動させ、駆動電流が供給されないとき磁石を旋回させないシャッタ羽根駆動手段と：被写界輝度から絞り値とシャッタ秒時とを演算しその演算結果によって前記各駆動手段への駆動電流の供給を制御すると共に電源がオンになったときには前記シャッタ羽根駆動手段によって前記シャッタ羽根部材を前記第２位置から前記第１位置へ作動させ電源がオフになったときには前記第１位置から前記第２位置へ作動させるとともに、前記演算結果に基づき前記絞り羽根部材の位置を決めておき、前記撮像手段に蓄積された電荷を放出させた後には、前記演算結果に基づき前記シャッタ羽根部材を第２位置へ作動させ、その後、前記シャッタ羽根部材を前記第１位置へ作動させるようにした制御手段と：を具備しているようにして上記の目的を達成する。[0005]
[Means for Solving the Problems]
The present invention has been made in view of such problems, and it is an object of the present invention to provide an image pickup apparatus which can miniaturize the periphery of a shutter, enable protection of an image pickup element and display of a liquid crystal finder while consuming less power. Do.
In summary, the imaging device according to claim 1 of the present invention comprises: an imaging optical system for forming an incident light on a predetermined imaging surface; an imaging means disposed on the imaging surface; and an exposure aperture. A main plate disposed in the optical path of the incident light, and a first position rotatably attached to the main plate and retracted from the exposed opening and a second position entering the exposed opening A diaphragm blade member operable between two positions to form an opening smaller than the exposed opening; and first rotatably attached to the base plate and retracted from the exposed opening by rotation A shutter blade member actuated between a position and a second position entering the exposed opening; and a rotatable magnet for pivoting the magnet when supplied with a driving current to move the diaphragm blade member The first position and the second position Between the shutter blade member and the diaphragm blade drive means which has a rotatable magnet, and when the drive current is supplied, the shutter blade member is rotated. A shutter which operates between the first position and the second position and operates the shutter blade member from the first position to the second position at the end stage of photographing and does not turn the magnet when the drive current is not supplied Blade drive means: The aperture value and the shutter speed are calculated from the field brightness, and the supply of drive current to each drive means is controlled according to the calculation result, and the shutter blade drive means when the power is turned on. Causes the shutter blade member to operate from the second position to the first position and operate from the first position to the second position when the power is turned off. In both cases, the position of the aperture blade member is determined based on the calculation result, and after releasing the charge accumulated in the imaging means, the shutter blade member is operated to the second position based on the calculation result. Thereafter, control means for operating the shutter blade member to the first position is provided to achieve the above object.

Claims

An imaging optical system for forming incident light on a predetermined imaging plane;
Imaging means disposed on the imaging plane;
A ground plane having an exposure aperture, the exposure aperture being disposed in the path of the incident light;
The first plate is rotatably attached to the ground plate and is operable between a first position retracted from the exposure opening and a second position entering the exposure opening to form an opening smaller than the exposure opening. Aperture blade members,
A shutter blade member rotatably attached to the base plate and operated to rotate between a first position retracted from the exposure opening and a second position entering the exposure opening by rotation;
It has a rotatable magnet, and when drive current is supplied, the magnet is pivoted to operate the diaphragm blade member between the first position and the second position, and drive current is not supplied. Iris blade drive means that does not turn the magnet when
It has a rotatable magnet, and when the drive current is supplied, the magnet is pivoted to operate the shutter blade member between the first position and the second position and the shutter at the end of photographing. Shutter blade driving means for operating the blade member from the first position to the second position and not rotating the magnet when no drive current is supplied;
The aperture value and the shutter speed are calculated from the field brightness, and the supply of drive current to each drive means is controlled according to the result of the calculation, and the shutter blade drive means controls the shutter blade when the power is turned on. Is operated from the second position to the first position and operated from the first position to the second position when the power is turned off, and the position of the diaphragm blade member is determined based on the calculation result, After releasing the charge accumulated in the imaging means, control is performed such that the shutter blade member is operated to the second position based on the calculation result, and then the shutter blade member is operated to the first position And an imaging device characterized by comprising: