公开(公告)号：US06934095B2

公开(公告)日：2005-08-23

申请号：US10746655

申请日：2003-12-29

Applicant: Shinichi Mihara

Inventor： Shinichi Mihara

IPC: G02B13/02 ,  G02B17/00 ,  G02B15/14

CPC classification number: G02B13/02

Abstract: An electronic imaging apparatus includes an optical system that has a reflecting surface for bending an optical path, and a variable-transmittance optical element placed in the optical system. The variable-transmittance optical element is constructed so that a ray of light passes through the optical element a plurality of times. Whereby, a slim-design electronic imaging apparatus can be provided which is small in size and extremely small in depth and in which the amount of light can be adjusted in a wide range.

Abstract translation: 电子成像装置包括具有用于弯曲光路的反射面的光学系统和放置在光学系统中的可变透射率光学元件。 可变透射光学元件被构造成使得光线多次通过光学元件。 因此，可以提供尺寸小且深度非常小并且可以在宽范围内调整光量的细长设计的电子成像装置。

公开(公告)号：US06771432B2

公开(公告)日：2004-08-03

申请号：US10409172

申请日：2003-04-09

Applicant: Shinichi Mihara

Inventor： Shinichi Mihara

IPC: G02B1514

CPC classification number: G02B15/173 ,  G02B5/04

Abstract: A zoom lens includes a first lens group that remains fixed during zooming, a second lens group having a negative refractive power that moves during zooming, a third lens group that has a positive refractive power and moves during zooming, and a fourth lens group that has a positive refractive power and moves during zooming and focusing. The first lens group includes a negative meniscus convex lens component, a reflecting optical element for bending an optical path, and a positive lens. The first lens group may include a reflecting optical element that upon focusing on an infinite object point, the fourth group lens moves in a locus opposite to the movement of the third lens group during zooming.

Abstract translation: 变焦透镜包括在变焦期间保持固定的第一透镜组，具有在变焦期间移动的负折光力的第二透镜组，具有正屈光力并在变焦期间移动的第三透镜组，以及具有 正折射力并在变焦和聚焦期间移动。 第一透镜组包括负弯月面凸透镜部件，用于弯曲光路的反射光学元件和正透镜。 第一透镜组可以包括反射光学元件，当聚焦在无限物体点上时，第四组透镜在变焦期间在与第三透镜组的运动相反的轨迹上移动。

公开(公告)号：US06687059B2

公开(公告)日：2004-02-03

申请号：US09741000

申请日：2000-12-21

Applicant: Shinichi Mihara

Inventor： Shinichi Mihara

IPC: G02B1514

CPC classification number: G02B15/177

Abstract: The invention relates to a high-performance, large-aperture yet wide-angle zoom lens system that can be used with an electronic image pickup device in particular, a method for focusing the same. In particular, the invention is concerned with a high-performance, large-aperture yet wide-angle zoom lens system which has a zoom ratio of the order of 3 at a diagonal field angle of 75° at its wide-angle end, so that it can be used with a single-lens reflex camera using an electronic image pickup device with the number of pixels being of the order of 6,000,000. The zoom lens system comprises a first lens group G1 having negative refracting power, a second lens group G2 having positive refracting power, a third lens group G3 having negative refracting power, a fourth lens group G4 having positive refracting power and a fifth lens group G5 having positive refracting power. Upon movement of an object point, focusing is carried out with the fifth lens group G5.

公开(公告)号：US06594087B2

公开(公告)日：2003-07-15

申请号：US09934074

申请日：2001-08-22

Applicant: Tsutomu Uzawa ,  Shinichi Mihara ,  Yuko Kobayashi

Inventor： Tsutomu Uzawa ,  Shinichi Mihara ,  Yuko Kobayashi

IPC: G02B1514

CPC classification number: G02B15/173 ,  G02B15/17

Abstract: The invention relates to a zoom lens system which is compatible with a TTL optical finder having a diagonal field angle of at least 70° at the wide-angle end and about 7 to 10 magnifications and is fast as represented by an F-number of about 2.8 at the wide-angle end. The zoom lens system comprises a first lens group G1 which is movable along its optical axis during zooming and has positive refracting power, a second lens group G2 which moves toward the image side along the optical axis during zooming from the wide-angle end to the telephoto end and has negative refracting power and rear lens groups G3 to G6 having at least two spacings variable during zooming. In particular, the focal length f1 of the first lens group G1 should meet 6

公开(公告)号：US6088059A

公开(公告)日：2000-07-11

申请号：US780139

申请日：1996-12-26

Applicant: Shinichi Mihara ,  Osamu Inagaki ,  Gakuji Kamishima ,  Atsuo Goto

Inventor： Shinichi Mihara ,  Osamu Inagaki ,  Gakuji Kamishima ,  Atsuo Goto

IPC: G02B5/18 ,  G02B13/00 ,  H04N1/58 ,  H04N5/225 ,  H04N9/07

CPC classification number: H04N1/58 ,  H04N5/217

Abstract: An electronic imaging apparatus capable of obtaining high image quality that serves for printed photographs, e.g. DTP and posters. The apparatus has an image-forming optical system (1), a solid-state image pickup device (3), a signal processing device (4), and a sensor driving circuit (5). The image-forming optical system (1) includes a diffraction lens for correcting chromatic aberrations. The signal processing device (4) includes an image processing device for removing flare components due to unwanted orders of diffracted light produced by a diffraction surface. The image processing device obtains a flare component by performing the convolution of the point image energy intensity distribution of each unwanted order of diffracted light with the energy intensity distribution of an image signal, and subtracts the flare component from the image signal to obtain a corrected image signal.

Abstract translation: 一种能够获得用于印刷照片的高图像质量的电子成像装置，例如， DTP和海报。 该装置具有图像形成光学系统（1），固态图像拾取装置（3），信号处理装置（4）和传感器驱动电路（5）。 图像形成光学系统（1）包括用于校正色差的衍射透镜。 信号处理装置（4）包括图像处理装置，用于由于由衍射面产生的衍射光的不希望的次数而去除耀斑成分。 图像处理装置通过执行每个不想要的衍射光级的点图像能量强度分布与图像信号的能量强度分布的卷积来获得闪光分量，并从图像信号中减去耀斑成分以获得校正图像 信号。

公开(公告)号：US5570233A

公开(公告)日：1996-10-29

申请号：US269790

申请日：1994-07-01

Applicant: Shinichi Mihara ,  Hironori Shibata

Inventor： Shinichi Mihara ,  Hironori Shibata

IPC: G02B13/18 ,  G02B15/173 ,  G02B15/20 ,  G02B15/14

CPC classification number: G02B15/173

Abstract: A vari-focal lens system comprising, in order from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power and a fourth lens unit having a positive refractive power; and configured so as to be set at a focal length at a telephoto position thereof from that at a wide-angle position thereof by moving the first lens unit monotonically toward the object side, displacing the second lens unit monotonically toward the image side, setting the third lens unit at a location on the object side of its original setting at the wide-angle position and moving the fourth lens unit from a location thereof to focus the vari-focal lens system on an object effectively located at infinite distance so as to widen an airspace reserved between the third lens unit and the fourth lens unit as compared to the airspace at the wide-angle position. The vari-focal lens system can be focused by moving the fourth lens unit.

Abstract translation: 一种变焦透镜系统，其从物体侧依次包括具有正折光力的第一透镜单元，具有负折光力的第二透镜单元，具有正折光力的第三透镜单元和具有正屈光力的第四透镜单元， 正屈光力; 并且被配置为通过将第一透镜单元单调地朝向物体侧而将其设置在其远摄位置处的焦距处，从而将第二透镜单元单调地朝向像侧移位， 第三透镜单元在其原始设置的物体侧的位置处在广角位置处，并且从其位置移动第四透镜单元，以将可变焦距透镜系统聚焦在有效位于无限距离处的物体上，以扩大 与广角位置的空域相比，在第三透镜单元和第四透镜单元之间保留的空间。 可以通过移动第四透镜单元来聚焦变焦透镜系统。

公开(公告)号：US5296969A

公开(公告)日：1994-03-22

申请号：US939944

申请日：1992-09-02

Applicant: Shinichi Mihara

Inventor： Shinichi Mihara

IPC: G02B13/18 ,  G02B15/16 ,  G02B15/173 ,  G02B15/14 ,  G02B3/02

CPC classification number: G02B15/173

Abstract: The present invention provides a zoom lens system which comprises nine or less constituent lenses in all, has a short total length and a small front lens, is reduced in terms of size, weight and cost, has a high zoom ratio and a large aperture ratio, and is best suited for use with handy camcorders, and which comprises a first lens unit G1 having a positive refracting power, a second lens unit G2 having a negative refracting power and movable horizontally along the optical axis during zooming, a third lens unit G3 constantly remaining fixed and consisting of a positive lens in which the object-side surface has a stronger curvature and at least the object-side surface takes an aspherical configuration and a negative meniscus lens in which the image-side surface has a stronger curvature, two lenses in all, said third lens unit G3 having a positive refracting power as a whole, and a fourth lens unit G4 movable horizontally along the optical axis for focus regulation during zooming and moving the object point and consisting solely of a positive single lens in which the object-side surface assumes an aspherical configuration.

Abstract translation: 本发明提供了一种变焦透镜系统，包括九个或更少的构成透镜，总体上具有短的长度和小的前透镜，在尺寸，重量和成本方面都减小，具有高变焦比和大的开口率 并且最适合用于便携式摄像机，并且其包括具有正折射率的第一透镜单元G1，具有负折射能力并且在变焦期间沿光轴水平移动的第二透镜单元G2，第三透镜​​单元G3 不断保持固定，并且由正面透镜构成，其中物侧表面具有更强的曲率，并且至少物侧表面呈现非球面形状，并且图像侧表面具有较强曲率的负弯月形透镜 整个透镜，所述第三透镜单元G3整体具有正折射力，以及第四透镜单元G4，沿着光轴水平移动，用于在变焦期间进行聚焦调节和mov 并且仅由物体侧表面呈现非球面构型的正单透镜构成。

公开(公告)号：US5184223A

公开(公告)日：1993-02-02

申请号：US692254

申请日：1991-04-26

Applicant: Shinichi Mihara

Inventor： Shinichi Mihara

IPC: G02B13/08

CPC classification number: G02B13/08

Abstract: The electronic imaging apparatus comprises an imaging lens system for forming an image of an object at magnifications different between an x-z section and y-z section when the object is placed on a z-axis, an imaging optical system, an image sensor having a photoelectric converting surface substantially perpendicular to the z-axis for receiving the image of the object, and a video signal processing circuit capable of changing a difference in expansion/contraction ratio between a scanning direction and the direction perpendicular thereto for reproducing an image of object on the basis of output signals from the image sensor and is capable of generating video signals for displaying an image substantially similar to the object. This electronic imaging apparatus permits obtaining a very clear reproduced image which is substantially similar to the object.

Abstract translation: 该电子成像装置包括：成像透镜系统，用于当物体放置在z轴上时，在xz部分和yz部分之间以不同的倍率形成物体的图像，成像光学系统，具有光电转换表面的图像传感器 基本上垂直于z轴接收物体的图像;以及视频信号处理电路，其能够改变扫描方向和垂直于其的方向之间的扩张/收缩比的差异，以基于 输出来自图像传感器的信号，并且能够产生用于显示与该对象基本相似的图像的视频信号。 该电子成像装置允许获得与目标基本相似的非常清晰的再现图像。

公开(公告)号：US5119237A

公开(公告)日：1992-06-02

申请号：US648903

申请日：1991-01-31

Applicant: Shinichi Mihara

Inventor： Shinichi Mihara

IPC: G02B15/173

CPC classification number: G02B15/173

Abstract: A zoom lens system comprising, in the order from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, an aperture stop, a third lens unit having a positive refractive power and a fourth lens unit having a weak refractive power, adapted so as to perform variation of focal length by displacing the second lens unit and the third lens unit in the directions reverse to each other along the optical axis with the first lens unit and the fourth lens unit kept fixed, and having a favorable optical performance and a total length shortened by using a small front lens component.

Abstract translation: 一种变焦透镜系统，包括从物体侧开始的具有正折光力的第一透镜单元，具有负屈光力的第二透镜单元，孔径光阑，具有正折光力的第三透镜单元和第四透镜单元 具有弱屈光力的透镜单元，适于通过使第一透镜单元和第四透镜单元保持在沿着光轴相反的方向上移动第二透镜单元和第三透镜单元而实现焦距的变化 并且通过使用小的前透镜部件而缩短了良好的光学性能和总长度。