公开(公告)号：US06285832B1

公开(公告)日：2001-09-04

申请号：US09559541

申请日：2000-04-28

申请人： Shuichi Ishii ,  Takaaki Kotani ,  Seimei Ushiro

发明人： Shuichi Ishii ,  Takaaki Kotani ,  Seimei Ushiro

IPC分类号： G02B728

CPC分类号： G02B7/32 ,  G01C3/085

摘要： A camera is provided with an SPD and a PSD suitable for implementing a camera capable of enhancing an accuracy of focusing and/or reducing a cost with a small scale of circuit. In the event that a photography is performed at a relatively short distance, a switch is switched by an MPU to offer a low impedance state. An AF-dedicated photo detector circuit determines a distance I1 and I2 obtained through a pair of signal electrodes of the PSD. On the other hand, in case of a relatively long distance, the MPU switches the switch to offer a high impedance state in accordance with distance data representative of the determined distance, so that an AF-dedicated photo detector circuit determines a distance up to the camera subject in accordance with photo-current I3 obtained from one of the signal electrodes of the PSD. In this manner, in the event that a photography is performed at a relatively long distance, there is performed a processing of determining a distance up to the subject in accordance with a total quantity of light.

摘要翻译： 相机配有SPD和PSD，适用于实现能够提高聚焦精度和/或降低小规模电路成本的相机。 在相对较短的距离进行拍摄的情况下，通过MPU切换开关以提供低阻抗状态。 AF专用光电检测器电路确定通过PSD的一对信号电极获得的距离I1和I2。 另一方面，在相对长的距离的情况下，MPU根据表示所确定的距离的距离数据来切换开关以提供高阻抗状态，使得AF专用光电检测器电路确定到 根据从PSD的信号电极之一获得的光电流I3的相机对象。 以这种方式，在相对长的距离进行拍摄的情况下，执行根据总光量确定到被摄体的距离的处理。

公开(公告)号：US06664524B2

公开(公告)日：2003-12-16

申请号：US09789647

申请日：2001-02-21

申请人： Yukio Ogura ,  Hideyuki Moribe ,  Yukio Morishige

发明人： Yukio Ogura ,  Hideyuki Moribe ,  Yukio Morishige

IPC分类号： G02B728

CPC分类号： G02B7/28

摘要： The present focusing method is used in a focus detecting apparatus comprising an objective lens, means for entering a luminous flux for focus detection into a target object from a position inconsistent with an optical axis of the objective lens through at least the objective lens, a condenser lens for converging the luminous flux after it is reflected by the target object and again passes through the objective lens, two two-division sensors disposed with the same optical inclination in front of and behind a position where the reflected luminous flux is converged by the condenser lens when a focus of the objective lens is adjusted to the surface of the target object, and a signal processing circuit for performing operational processing of signals from the two two-division sensors. The focus detecting apparatus detects whether the focus of the objective lens is adjusted to the surface of the target object. When focusing is performed with this apparatus, the target object is moved while the focus position is followed after the detection of the focus position, focus detection is performed many times and the detected signal values are averaged, and the resultant average value is used to drive the objective lens. This series of operations is repeated, and then the focus position is fixed.

摘要翻译： 本聚焦方法用于包括物镜的焦点检测装置，用于通过至少物镜从与物镜的光轴不一致的位置将用于焦点检测的光束进入目标物体的装置，冷凝器 透镜，用于在其被目标物体反射并且再次通过物镜之后会聚光通量，两个二分割传感器在反射光束被冷凝器会聚的位置的前面和后面具有相同的光学倾斜度 当物镜的焦点被调整到目标物体的表面时，以及信号处理电路，用于执行来自两个两分传感器的信号的操作处理。 焦点检测装置检测物镜的焦点是否被调整到目标物体的表面。 当使用该装置进行聚焦时，在检测到聚焦位置之后跟踪对焦位置时移动目标物体，进行焦点检测多次，并且检测到的信号值被平均，并且将所得到的平均值用于驱动 物镜。 这一系列操作重复，然后焦点位置固定。

公开(公告)号：US06549730B1

公开(公告)日：2003-04-15

申请号：US09671629

申请日：2000-09-28

申请人： Masataka Hamada

发明人： Masataka Hamada

IPC分类号： G02B728

CPC分类号： G02B7/28 ,  G02B7/102 ,  G03B13/00

摘要： A spatial modulator, a luminous flux deflector, a focus detection apparatus and a imaging device, which are capable of changing the focal position. The focus detection device includes: a focus sensor; liquid crystal cells that are arranged between a lens and the focus sensor and deflect luminous flux guided from the lens to the focus sensor while enabling a deflection characteristic of the luminous flux guided from the lens to the focus sensor to be changed; and a microcomputer for controlling the liquid crystal cells according to the size, position and so on upon an exit pupil of the lens and changing the deflection characteristic of the luminous flux guided from the lens to the focus sensor.

摘要翻译： 能够改变焦点位置的空间调制器，光通量偏转器，焦点检测装置和成像装置。 焦点检测装置包括：聚焦传感器; 配置在透镜和聚焦传感器之间的液晶单元，使从透镜引导到聚焦传感器的光束偏转，同时能够改变从透镜引导到聚焦传感器的光束的偏转特性; 以及微型计算机，用于根据透镜的出射光瞳上的尺寸，位置等来控制液晶单元，并且改变从透镜引导到聚焦传感器的光束的偏转特性。