公开(公告)号：US20040174612A1

公开(公告)日：2004-09-09

申请号：US10786134

申请日：2004-02-26

申请人： OLYMPUS CORPORATION

发明人： Yoshimasa Suzuki ,  Tetsuhide Takeyama

IPC分类号： G03B027/72 ,  G02B015/14

CPC分类号： G02B15/163

摘要： An imaging optical system has a variable magnification optical system. The variable magnification optical system includes, in order from the object side, a first lens unit with positive refractive power, a second lens unit with positive refractive power, a third lens unit with negative refractive power, a fourth lens unit with positive refractive power, and an aperture stop interposed between the third lens unit and the fourth lens unit. The variable magnification optical system changes an imaging magnification while keeping an object-to-image distance constant. The imaging magnification is changed by varying spacing between the first lens unit and the second lens unit, spacing between the second lens unit and the third lens unit, and spacing between the third lens unit and the fourth lens unit. When the imaging magnification is changed, the imaging optical system satisfies the following conditions in at least one variable magnification state: nullEnnull/L>0.4 nullEx/nullL/nullnull>0.4 where En is a distance from a first lens surface on the object side of the variable magnification optical system to the entrance pupil of the imaging optical system, L is the object-to-image distance of the imaging optical system, Ex is a distance from the most image-side lens surface of the variable magnification optical system to the exit pupil of the imaging optical system, and null is the magnification of the entire system of the imaging optical system.

摘要翻译： 成像光学系统具有可变放大率光学系统。 可变放大率光学系统从物体侧依次包括具有正屈光力的第一透镜单元，具有正屈光力的第二透镜单元，具有负屈光力的第三透镜单元，具有正屈光力的第四透镜单元， 以及插入在第三透镜单元和第四透镜单元之间的孔径光阑。 可变放大倍率光学系统在保持对象间距离保持恒定的同时改变成像倍率。 通过改变第一透镜单元和第二透镜单元之间的间隔，第二透镜单元和第三透镜单元之间的间隔以及第三透镜单元和第四透镜单元之间的间隔来改变成像倍率。 当成像倍率改变时，成像光学系统在至少一个可变放大状态下满足以下条件：| En | / L> 0.4 | Ex / | L /β|> 0.4其中En是距第一透镜表面的距离 在可变放大光学系统的物体侧到成像光学系统的入射光瞳，L是成像光学系统的物体到图像的距离，Ex是距离变量的最大像侧透镜表面的距离 放大光学系统到成像光学系统的出射光瞳，β是成像光学系统的整个系统的放大倍数。

公开(公告)号：US20040109208A1

公开(公告)日：2004-06-10

申请号：US10716395

申请日：2003-11-20

申请人： OLYMPUS CORPORATION

发明人： Takahiro Amanai ,  Tetsuhide Takeyama ,  Masachika Watanabe

IPC分类号： G03H001/00

CPC分类号： G02B17/086 ,  G02B17/08 ,  G02B17/0816

摘要： A viewing optical system for display apparatus allows observation of a bright displayed image favorably corrected for aberrations and is easy to assemble, resistant to impact such as vibration, lightweight and compact. An ocular optical member for leading an observation image formed by an observation image forming member to an exit pupil has a first prism member and a second prism member. The first prism member has a first entrance surface, a reflecting surface and a first exit surface disposed to face each other across a first prism medium. The second prism member has a second entrance surface and a second exit surface disposed to face each other across a second prism medium. The first and second prism members are cemented together with a holographic element interposed between the first exit surface and the second entrance surface. The reflecting surface has a positive power. The first exit surface and the second entrance surface are each formed from a plane or cylindrical surface. The holographic element also has a plane of cylindrical surface.

摘要翻译： 用于显示装置的观察光学系统允许观察到良好地校正为像差的明亮的显示图像，并且易于组装，抵抗诸如振动，轻量级和紧凑的冲击。 用于将由观察图像形成构件形成的观察图像引导到出射光瞳的眼睛光学构件具有第一棱镜构件和第二棱镜构件。 第一棱镜构件具有第一入射面，反射面和第一出射面，该第一入射面和第一出射面配置成跨越第一棱镜介质彼此相对。 第二棱镜构件具有第二入射表面和第二出射表面，该第二入射表面和第二出射表面设置为跨越第二棱镜介质彼此面对。 第一和第二棱镜构件与置于第一出射表面和第二入射表面之间的全息元件粘合在一起。 反射面具有正的功率。 第一出射面和第二入射面各自由平面或圆柱面形成。 全息元件还具有圆柱面的平面。