公开(公告)号：US07155073B2

公开(公告)日：2006-12-26

申请号：US11122153

申请日：2005-05-03

申请人： Kazuhiko Momoki ,  Keiji Ohtaka

发明人： Kazuhiko Momoki ,  Keiji Ohtaka

IPC分类号： G02B6/00

CPC分类号： G02B5/1809 ,  G02B5/3025

摘要： A high performance polarization splitting element and an optical device using the polarization splitting element are provided. According to an embodiment of the present invention, the optical device includes a first periodic structure having a period shorter than a wavelength of used light, a second periodic structure which has a period shorter than the wavelength of the used light and in which a direction of the period is orthogonal to or substantially orthogonal to that of the first periodic structure, and a pair of optical elements disposed so as to sandwich the first periodic structure and the second periodic structure. The second periodic structure is adjacent to the first periodic structure. The first periodic structure and the second periodic structure transmit light having first polarization direction and reflect light having second polarization direction orthogonal to the first direction.

摘要翻译： 提供了高性能偏振分离元件和使用偏振分离元件的光学器件。 根据本发明的实施例，光学装置包括具有比所使用的光的波长短的周期的第一周期性结构，具有比所使用的光的波长短的周期的第二周期性结构，其中， 所述周期与所述第一周期性结构的周期正交或基本正交，并且所述一对光学元件被布置为夹着所述第一周期性结构和所述第二周期性结构。 第二周期性结构与第一周期结构相邻。 第一周期性结构和第二周期结构透射具有第一偏振方向的光并反射具有与第一方向正交的第二偏振方向的光。

公开(公告)号：US07116478B2

公开(公告)日：2006-10-03

申请号：US10930128

申请日：2004-08-31

申请人： Kazuhiko Momoki ,  Keiji Ohtaka

发明人： Kazuhiko Momoki ,  Keiji Ohtaka

IPC分类号： G02B5/30

CPC分类号： G02B5/3025 ,  G02B27/283

摘要： In a conventional polarization beam splitter, it has been difficult to improve the angle-dependence characteristic of polarized beam splitting efficiency even if the number of layers is increased. The polarization beam splitter of the present invention is a polarization beam splitter having a polarized beam splitting layer having structure in which a plurality of gratings parallel to a first direction are periodically disposed in a second direction orthogonal to the first direction, and of light incident on the polarization beam splitter, chiefly light of a polarized component parallel to the first direction is transmitted therethrough, and chiefly light of a polarized component parallel to the second direction is reflected.

摘要翻译： 在传统的偏振分束器中，即使层数增加，也难以改善偏振光束分离效率的角度依赖特性。 本发明的偏振分束器是具有偏振光束分离层的偏振光束分离器，其特征在于，与第一方向平行的多个光栅在与第一方向正交的第二方向上周期性地设置， 主要是偏振分束器，主要是平行于第一方向的偏振分量的光透过其中，并且主要反射与第二方向平行的偏振分量的光。

公开(公告)号：US06594085B2

公开(公告)日：2003-07-15

申请号：US09842119

申请日：2001-04-26

申请人： Keiji Ohtaka ,  Takashi Sudo

发明人： Keiji Ohtaka ,  Takashi Sudo

IPC分类号： G02B2714

CPC分类号： G02B27/0172 ,  G02B5/30

摘要： An image display apparatus includes a light source for supplying illumination light, a reflection type display element for modulating the illumination light into image light by reflecting the light, an illumination optical system for guiding the illumination light to the reflection type display element, and a projection optical system for guiding the image light to an observer. The image light is incident on the projection optical system via at least a portion of the illumination optical system. The illumination optical system has a part, in an area where both the illumination light and the image light pass, which changes an optical action depending on a state of incident light. The part acts to deflect the illumination light to decrease an incident angle with respect to the reflection type display element as compared with a case where the part does not exist.

公开(公告)号：US4723142A

公开(公告)日：1988-02-02

申请号：US926808

申请日：1986-10-30

申请人： Kikuo Momiyama ,  Kazuo Fujibayashi ,  Keiji Ohtaka

发明人： Kikuo Momiyama ,  Kazuo Fujibayashi ,  Keiji Ohtaka

IPC分类号： B65D1/02 ,  G02B7/32 ,  G03B3/00

CPC分类号： G02B7/32

摘要： The disclosed device prevents degradation of distance measurement accuracy due to alignment error in the mounting of a detachable lens barrel on a camera body. The lens barrel houses a focusing objective lens and a first distance measurement position is set along the optical path of the objective lens within the lens barrel. A second distance measuring position is set within the camera body. A light projector is positioned at one of the distance measuring positions and projects a measuring beam, and a photo detector is positioned at the other of the distance measuring positions to receive a reflection beam from the object being measured to produce a signal to be used for focus adjustment.

摘要翻译： 所公开的装置防止由于在相机机体上安装可拆卸镜筒而导致对准误差导致的距离测量精度的劣化。 透镜镜筒容纳聚焦物镜，沿镜片镜筒内的物镜的光路设置第一距离测量位置。 在相机机身内设置第二测距位置。 光投射器位于距离测量位置中的一个位置并且投射测量光束，并且光电检测器位于距离测量位置的另一个处，以接收来自被测量物体的反射光束，以产生用于 焦点调整。

公开(公告)号：US07236655B2

公开(公告)日：2007-06-26

申请号：US11433233

申请日：2006-05-12

申请人： Kazuhiko Momoki ,  Keiji Ohtaka

发明人： Kazuhiko Momoki ,  Keiji Ohtaka

IPC分类号： G02B6/00

CPC分类号： G02B5/1809 ,  G02B5/3025

摘要： A high performance polarization splitting element and an optical device using the polarization splitting element are provided. According to an embodiment of the present invention, the optical device includes a first periodic structure having a period shorter than a wavelength of used light, a second periodic structure which has a period shorter than the wavelength of the used light and in which a direction of the period is orthogonal to or substantially orthogonal to that of the first periodic structure, and a pair of optical elements disposed so as to sandwich the first periodic structure and the second periodic structure. The second periodic structure is adjacent to the first periodic structure. The first periodic structure and the second periodic structure transmit light having first polarization direction and reflect light having second polarization direction orthogonal to the first direction, and the second polarization direction is substantially parallel to one of the periodic direction of the first periodic structure and the periodic direction of the second periodic structure.

摘要翻译： 提供了高性能偏振分离元件和使用偏振分离元件的光学器件。 根据本发明的实施例，光学装置包括具有比所使用的光的波长短的周期的第一周期性结构，具有比所使用的光的波长短的周期的第二周期性结构，其中， 所述周期与所述第一周期性结构的周期正交或基本正交，并且所述一对光学元件被布置为夹着所述第一周期性结构和所述第二周期性结构。 第二周期性结构与第一周期结构相邻。 第一周期性结构和第二周期性结构透射具有第一偏振方向的光并且反射具有与第一方向正交的第二偏振方向的光，并且第二偏振方向基本上平行于第一周期性结构的周期方向之一， 方向的第二周期性结构。

公开(公告)号：US20050078372A1

公开(公告)日：2005-04-14

申请号：US10930128

申请日：2004-08-31

申请人： Kazuhiko Momoki ,  Keiji Ohtaka

发明人： Kazuhiko Momoki ,  Keiji Ohtaka

IPC分类号： G02B5/30 ,  G02B27/28 ,  G03B21/00 ,  G11B7/00

CPC分类号： G02B5/3025 ,  G02B27/283

摘要： In the conventional polarization beam splitter, it has been difficult to improve the angle-dependence characteristic of polarized beam splitting efficiency even if the number of layers is increased. The polarization beam splitter of the present invention is a polarization beam splitter having a polarized beam splitting layer having structure in which a plurality of gratings parallel to a first direction are periodically disposed in a second direction orthogonal to the first direction, and of light incident on the polarization beam splitter, chiefly light of a polarized component parallel to the first direction is transmitted therethrough, and chiefly light of a polarized component parallel to the second direction is reflected.

摘要翻译： 在传统的偏振分束器中，即使层数增加，也难以改善偏振光束分离效率的角度依赖性。 本发明的偏振分束器是具有偏振光束分离层的偏振光束分离器，其特征在于，与第一方向平行的多个光栅在与第一方向正交的第二方向上周期性地设置， 主要是偏振分束器，主要是平行于第一方向的偏振分量的光透过其中，并且主要反射与第二方向平行的偏振分量的光。

公开(公告)号：US06831706B2

公开(公告)日：2004-12-14

申请号：US10197131

申请日：2002-07-17

申请人： Masayuki Abe ,  Keiji Ohtaka ,  Atsushi Okuyama

发明人： Masayuki Abe ,  Keiji Ohtaka ,  Atsushi Okuyama

IPC分类号： G02F11335

CPC分类号： G02B27/1026 ,  G02B27/14 ,  G02B27/145 ,  G02B27/283 ,  H04N5/7441 ,  H04N9/3167

摘要： When light from a reflection image display element is incident on a polarization split surface at an angle other than 45°, leakage light that decreases the contrast of an image is produced. In a projection image display apparatus which illuminates an image display element with light from a light source and projects light from the image display element through two polarization split surfaces, when the angles of first and second light rays, of light rays incident on the polarization split surface, with respect to the optical axis correspond to 55% of the maximum angle of the incident light rays with respect to the optical axis, where light rays of which incident angle with respect to said image display element is larger is set as first light ray and light rays of which incident angle with respect to said image display element is smaller is set as second light ray, and a light shielding characteristic value L on the two polarization split surfaces is represented by L=[(M1)a·(M1)b+(M2)a·(M2)b]/2 where (M1)a is the amount of leakage light of the first light ray on the polarization split on the reflection image display element side, (M2)a is the amount of leakage light of the second light ray, (M1)b is the amount of leakage light of the first light ray on the polarization split on the projection optical system side, and (M2)b is the amount of leakage light of the second light ray.

摘要翻译： 当来自反射图像显示元件的光以不同于45°的角度入射到偏振分割表面时，产生降低图像的对比度的泄漏光。 在利用来自光源的光照射图像显示元件的投影图像显示装置中，通过两个偏振分割面投影来自图像显示元件的光，当入射到偏振光分离体上的光线的第一和第二光线的角度 表面相对于光轴对应于入射光线相对于光轴的最大角度的55％，其中相对于所述图像显示元件的入射角较大的光线较大，被设定为第一光线 将相对于所述图像显示元件的入射角较小的光线设定为第二光线，并且将两个偏振分割面的遮光特性值L表示为L = [（M1）a（M1） b +（M2）a。（M2）b] / 2其中（M1）a是第一光线在反射图像显示元件侧的偏振分束上的泄漏光量，（M2）a是泄漏量 的光 （M1）b是投影光学系统侧的偏振光分割时的第一光线的泄漏光量，（M2）b是第二光线的漏光量。

公开(公告)号：US5729771A

公开(公告)日：1998-03-17

申请号：US588420

申请日：1996-01-18

申请人： Keiji Ohtaka

发明人： Keiji Ohtaka

IPC分类号： G02B7/34 ,  G03B13/00 ,  G03B13/34

CPC分类号： G02B7/346

摘要： The present invention relates to a focus detecting apparatus comprising a field mask disposed near a prescribed image plane of an objective lens and having an aperture offset from the optical axis of the objective lens in order to restrict a field area. A field lens is disposed near the prescribed image plane of the objective lens with a pair of secondary imaging lenses corresponding to the aperture for reimaging an image formed by the objective lens. A stop is disposed adjacent to the pair of secondary imaging lenses and having a pair of apertures for restricting light passing through the pair of secondary imaging lenses. A senor for detecting light quantity; distributions of images formed by the secondary imaging lenses. The pair of secondary imaging lenses are in contact with each other and have different projection shapes on a plane perpendicular to the optical axis of the objective lens.

摘要翻译： 本发明涉及一种聚焦检测装置，其包括设置在物镜的预定像平面附近并具有从物镜的光轴偏移的孔径以便限制场区域的场屏蔽。 场透镜设置在物镜的规定像平面附近，具有与对应于由物镜形成的图像重新成像的孔的一对次级成像透镜。 停止件邻近该对次级成像透镜设置，并且具有用于限制穿过该对次级成像透镜的光的一对孔。 用于检测光量的传感器; 由二次成像透镜形成的图像的分布。 一对次级成像透镜彼此接触并且在垂直于物镜的光轴的平面上具有不同的投影形状。

公开(公告)号：US20060204163A1

公开(公告)日：2006-09-14

申请号：US11433233

申请日：2006-05-12

申请人： Kazuhiko Momoki ,  Keiji Ohtaka

发明人： Kazuhiko Momoki ,  Keiji Ohtaka

IPC分类号： G02B6/00

CPC分类号： G02B5/1809 ,  G02B5/3025

摘要： A high performance polarization splitting element and an optical device using the polarization splitting element are provided. According to an embodiment of the present invention, the optical device includes a first periodic structure having a period shorter than a wavelength of used light, a second periodic structure which has a period shorter than the wavelength of the used light and in which a direction of the period is orthogonal to or substantially orthogonal to that of the first periodic structure, and a pair of optical elements disposed so as to sandwich the first periodic structure and the second periodic structure. The second periodic structure is adjacent to the first periodic structure. The first periodic structure and the second periodic structure transmit light having first polarization direction and reflect light having second polarization direction orthogonal to the first direction, and the second polarization direction is substantially parallel to one of the periodic direction of the first periodic structure and the periodic direction of the second periodic structure.

摘要翻译： 提供了高性能偏振分离元件和使用偏振分离元件的光学器件。 根据本发明的实施例，光学装置包括具有比所使用的光的波长短的周期的第一周期性结构，具有比所使用的光的波长短的周期的第二周期性结构，其中， 所述周期与所述第一周期性结构的周期正交或基本正交，并且所述一对光学元件被布置为夹着所述第一周期性结构和所述第二周期性结构。 第二周期性结构与第一周期结构相邻。 第一周期结构和第二周期结构透射具有第一偏振方向的光并且反射具有与第一方向正交的第二偏振方向的光，并且第二偏振方向基本上平行于第一周期性结构的周期方向和周期性周期 方向的第二周期性结构。

公开(公告)号：US20050249447A1

公开(公告)日：2005-11-10

申请号：US11122153

申请日：2005-05-03

申请人： Kazuhiko Momoki ,  Keiji Ohtaka

发明人： Kazuhiko Momoki ,  Keiji Ohtaka

IPC分类号： G02B5/18 ,  G02B5/30 ,  G02B6/00

CPC分类号： G02B5/1809 ,  G02B5/3025

摘要： A high performance polarization splitting element and an optical device using the polarization splitting element are provided. According to an embodiment of the present invention, the optical device includes a first periodic structure having a period shorter than a wavelength of used light, a second periodic structure which has a period shorter than the wavelength of the used light and in which a direction of the period is orthogonal to or substantially orthogonal to that of the first periodic structure, and a pair of optical elements disposed so as to sandwich the first periodic structure and the second periodic structure. The second periodic structure is adjacent to the first periodic structure. The first periodic structure and the second periodic structure transmit light having first polarization direction and reflect light having second polarization direction orthogonal to the first direction, and the second polarization direction is substantially parallel to one of the periodic direction of the first periodic structure and the periodic direction of the second periodic structure.

摘要翻译： 提供了高性能偏振分离元件和使用偏振分离元件的光学器件。 根据本发明的实施例，光学装置包括具有比所使用的光的波长短的周期的第一周期性结构，具有比所使用的光的波长短的周期的第二周期性结构，其中， 所述周期与所述第一周期性结构的周期正交或基本正交，并且所述一对光学元件被布置为夹着所述第一周期性结构和所述第二周期性结构。 第二周期性结构与第一周期结构相邻。 第一周期结构和第二周期结构透射具有第一偏振方向的光并且反射具有与第一方向正交的第二偏振方向的光，并且第二偏振方向基本上平行于第一周期性结构的周期方向和周期性周期 方向的第二周期性结构。