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公开(公告)号：US07450170B2
公开(公告)日：2008-11-11
申请号：US10892234
申请日：2004-07-16
CPC分类号： H04N5/238
摘要： When a brightness level of an object is below a predetermined level, an ND filter is removed from an iris opening to fully open the iris opening, and when the brightness level of the object is above a predetermined level, the ND filter is placed to the iris opening to fully close the iris opening. When the ND filter is moved between the fully-opened state and the fully-closed state, an exposure change amount corresponding to an amount offsetting the exposure change amount due to a state transition is generated by controlling iris blades.
摘要翻译： 当物体的亮度水平低于预定水平时，从虹膜开口去除ND滤光片以完全打开虹膜开口，并且当物体的亮度水平高于预定水平时，将ND滤光器放置在 虹膜开放以完全关闭虹膜开口。 当ND滤光器在完全打开状态和完全关闭状态之间移动时，通过控制虹膜叶片来产生对应于由于状态转变而抵消曝光改变量的量的曝光改变量。
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公开(公告)号：US20050046737A1
公开(公告)日：2005-03-03
申请号：US10892234
申请日：2004-07-16
CPC分类号： H04N5/238
摘要： When a brightness level of an object is below a predetermined level, an ND filter is removed from an iris opening to fully open the iris opening, and when the brightness level of the object is above a predetermined level, the ND filter is placed to the iris opening to fully close the iris opening. When the ND filter is moved between the fully-opened state and the fully-closed state, an exposure change amount corresponding to an amount offsetting the exposure change amount due to a state transition is generated by controlling iris blades.
摘要翻译： 当物体的亮度水平低于预定水平时，从虹膜开口去除ND滤光片以完全打开虹膜开口，并且当物体的亮度水平高于预定水平时，将ND滤光器放置在 虹膜开放以完全关闭虹膜开口。 当ND滤光器在完全打开状态和完全关闭状态之间移动时，通过控制虹膜叶片来产生对应于由于状态转变而抵消曝光改变量的量的曝光改变量。
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公开(公告)号：US07738185B2
公开(公告)日：2010-06-15
申请号：US10594328
申请日：2006-02-17
申请人： Motoyuki Ohtake , Koji Okajima , Mitsuhiro Suzaki
发明人： Motoyuki Ohtake , Koji Okajima , Mitsuhiro Suzaki
IPC分类号： G02B14/15
CPC分类号： G02B15/173
摘要： A zoom lens and imaging apparatus implementing four lens groups including a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, a third lens group G3 having a positive refractive power, and a fourth lens group G4 having a positive refractive power. When a positional state is varied from a wide-angle-end state to a telephoto-end state, the second lens group is moved to an image side, and the fourth lens group is moved to compensate for image plane variation caused by the movement of the second lens group.
摘要翻译： 一种变焦透镜和成像装置，其实现包括具有正折光力的第一透镜组G1，具有负屈光力的第二透镜组G2，具有正折光力的第三透镜组G3和第四透镜组G4的四个透镜组 具有正的屈光力。 当位置状态从广角端状态变化到长焦端状态时，第二透镜组移动到像侧，第四透镜组被移动以补偿由于移动造成的像平面变化 第二个镜头组。
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公开(公告)号：US5475534A
公开(公告)日：1995-12-12
申请号：US250424
申请日：1994-05-27
申请人： Koji Okajima , Akira Nakamura
发明人： Koji Okajima , Akira Nakamura
CPC分类号： G02B9/62
摘要： A projection lens system includes a cathode ray tube which projects the image to be projected on the screen through a set of six projection lens, which include non-spherical surfaces. The projection lens system is obliquely positioned in order to incline the optical axis of the projection lens at a predetermined angle with regard to the optical axis which exits from the projection lens and reaches the screen.
摘要翻译： 投影透镜系统包括阴极射线管，阴极射线管通过一组包括非球面的六个投影透镜将投射在屏幕上的图像投射在屏幕上。 投影透镜系统倾斜定位以使投影透镜的光轴相对于从投影透镜离开并到达屏幕的光轴以预定角度倾斜。
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公开(公告)号：US06181477B2
公开(公告)日：2001-01-30
申请号：US09354451
申请日：1999-07-15
申请人： Koji Okajima
发明人： Koji Okajima
IPC分类号： G02B300
摘要： In an imaging lens unit configured of two lenses, the deterioration of the optical performance due to the eccentricity is suppressed for an improved assembling property, while at the same time correcting the various aberrations in satisfactory manner. A meniscus first lens (L1) having a weak refracting power, and a meniscus second lens (L2) having positive refracting power with the convex surface thereof directed toward the image surface are arranged sequentially from the object side toward the image surface (IMG). The conditions f2/f>0.9 and nd2>1.55 are met, where f is the focal length of the whole lens system, f2 the focal length of the second lens, and nd2 the refractive index on the d line of the second lens.
摘要翻译： 在由两个透镜构成的成像透镜单元中，由于偏心性而导致的光学性能的劣化被抑制以提高组装性能，同时以令人满意的方式校正各种像差。 具有弱折射力的弯月面第一透镜（L1）和具有朝向图像表面的凸面的正折射率的弯液面第二透镜（L2）从物体侧朝向图像表面（IMG）顺序排列。 满足条件f2 / f> 0.9和nd2> 1.55，其中f是整个透镜系统的焦距，f2是第二透镜的焦距，nd2是第二透镜的d线上的折射率。
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公开(公告)号：US5742435A
公开(公告)日：1998-04-21
申请号：US744641
申请日：1996-11-06
申请人： Toshiro Nagashima , Kenichi Hamada , Koji Okajima , Kenji Hirano
发明人： Toshiro Nagashima , Kenichi Hamada , Koji Okajima , Kenji Hirano
CPC分类号： G02B7/102
摘要： Disclosed is a video-camera imaging-system lens barrel which overcomes the problem of a four-lens-group-type video-camera imaging-system lens barrel, which has a complicated structure and large size and weight due to the large number of lens groups. In a so-called two-group-type lens system, a first lens group 2 and a second lens group 3, which are in focus in an imaging plane (CCD 4) for each zoom magnification at fixed subject distances .alpha.m and .beta.m, are controlled such that they move along zoom tracking curves 1.sub.1, 1.sub.2, 1.sub.3 and 1.sub.4 which represent the paths of movement of the respective positions of the first lens group and the second lens group.
摘要翻译： 公开了一种摄像机成像系统镜筒，克服了四透镜组型摄像机成像系统镜筒的问题，由于镜头数量庞大，结构复杂，体积小，重量大 团体 在所谓的两组型透镜系统中，在固定被摄体距离αm和βm处对于每个变焦倍率在成像平面（CCD 4）中聚焦的第一透镜组2和第二透镜组3 被控制成使得它们沿着表示第一透镜组和第二透镜组的各个位置的移动路径的变焦跟踪曲线11,12,13和14移动。
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