公开(公告)号：US5051766A

公开(公告)日：1991-09-24

申请号：US504540

申请日：1990-04-04

Applicant: Osamu Nonaka ,  Yasuyuki Kawabe ,  Atushi Maruyama ,  Tatsuji Higuchi

Inventor： Osamu Nonaka ,  Yasuyuki Kawabe ,  Atushi Maruyama ,  Tatsuji Higuchi

IPC: G03B13/36 ,  G02B7/28 ,  G02B7/32

CPC classification number: G02B7/32

Abstract: An automatic focusing camera includes a first distance measurement circuit for measuring a first distance to an object located at a central portion of a frame, a second distance measurement circuit for measuring a plurality of second distances to other objects located at a peripheral portion of the frame, a CPU for comparing the first and second distance with a shortest photographing distance of the camera, for, when the first distance is shorter than the shortest photographing distance, selecting the shortest photographing distance as an object distance regardless of the second distance, for, when the first distance is not shorter than the shortest photographing distance and the second distance is shorter than the shortest photographing distance, selecting the first distance as the object distance, and for, when the first and second distances are not shorter than the shortest photographing distance, selecting a shorter one of the first and second distances as the object distance, and a mechanism for focusing a photographing lens on the basis of the object distance selected by the CPU.

Abstract translation: 一种自动聚焦照相机，包括：第一距离测量电路，用于测量位于帧中心部分的物体的第一距离;第二距离测量电路，用于测量位于所述帧的周边部分的其它物体的多个第二距离; 用于将第一和第二距离与相机的最短拍摄距离进行比较的CPU，当第一距离短于最短拍摄距离时，选择最短拍摄距离作为对象距离而与第二距离无关， 当第一距离不短于最短拍摄距离，并且第二距离短于最短拍摄距离时，选择第一距离作为对象距离，并且当第一和第二距离不短于最短拍摄距离时 选择第一和第二距离中较短的距离作为对象距离，以及 基于由CPU选择的对象距离来聚焦拍摄镜头的机构。

公开(公告)号：US5432574A

公开(公告)日：1995-07-11

申请号：US292603

申请日：1994-08-18

Applicant: Azuma Miyazawa ,  Atushi Maruyama ,  Takeshi Ito

Inventor： Azuma Miyazawa ,  Atushi Maruyama ,  Takeshi Ito

IPC: G03B9/36 ,  G03B17/04 ,  G03B19/12

CPC classification number: G03B17/04 ,  G03B19/12

Abstract: A single-collapsible-lens reflex camera includes a lens barrel designed such that it is moved forward into shooting position from the camera body when in use and at least its part is collapsed in the camera body when not in use. A shutter release button is provided to shoot a subject when pressed. Electromagnets for controlling the leading and following curtains of a focal plane shutter are deenergized before the shutter release button is pressed and energized when the button is pressed. A mirror drive member raises or lowers a movable reflex mirror when a subject is shot and the lens barrel is collapsed. A shutter charging member moves the focal plan shutter in the direction that charges the focal plane shutter in synchronism with the operation of the mirror driving member to raise the mirror and in the direction that discharges the shutter in synchronism with the operation of the discharges driving member to raise the mirror. A control circuit deenergizes the shutter leading-curtain controlling electromagnet when the mirror is raised, deenergizes the shutter following-curtain electromagnet after a length of time depending on the intensity of light reflected from a subject to be photographed, and keeps the leading-curtain and following-curtain controlling electromagnets deenergized when the mirror is raised to collapse the lens barrel. Thereby, the shutter is shifted to the non-charged state as it is closed when the lens barrel is collapsed.

Abstract translation: 单塌陷透镜反光相机包括设计成在使用时从照相机主体向前移动到拍摄位置的镜筒，并且至少其部分在不使用时折叠在照相机主体中。 提供快门释放按钮来按压拍摄对象。 用于控制焦平面快门的前后帘的电磁铁在按下快门释放按钮并被激励之前被断电。 当拍摄被摄体并且镜筒折叠时，镜驱动构件升高或降低可动反射镜。 快门充电构件与反射镜驱动构件的操作同步地使焦平面遮光板沿着与焦平面遮板充电的方向移动，以提升反射镜并沿与排出驱动构件的操作同步地排出挡板的方向 抬起镜子。 当镜子升高时，控制电路使快门前窗控制电磁铁断电，一段时间后根据被拍摄对象反射的光的强度，使快门帘幕电磁铁断电，并保持前窗帘和 后视窗控制电磁铁在镜子升起以使透镜镜筒折叠时断电。 因此，当镜筒折叠时，挡板被关闭时移动到非充电状态。