公开(公告)号：US06490095B2

公开(公告)日：2002-12-03

申请号：US09812698

申请日：2001-03-21

申请人： Atsushi Okuyama ,  Tatsuo Chigira ,  Junko Kuramochi ,  Takashi Sudo

发明人： Atsushi Okuyama ,  Tatsuo Chigira ,  Junko Kuramochi ,  Takashi Sudo

IPC分类号： G02B2714

CPC分类号： G02B27/0172 ,  G02B5/30 ,  G02F1/133526 ,  G02F2203/02

摘要： An image display apparatus includes a light source for supplying illumination light, a reflective display element for reflecting and modulating the illumination light into image light, a first optical system for guiding the illumination light to the reflective display element, and a second optical system for guiding the image light to an observer. Particularly, the first optical system has an optical element including a first surface on which the illumination light is incident, a second surface for totally reflecting the light incident on the first surface, and a third surface from which the light totally reflected by the second surface emerges toward the reflective display element. The first optical system is arranged so that the image light is again incident through the third surface on the optical element and emerges from the second surface toward the second optical system. The optical element has a function of preventing unnecessary light from being guided to the observer, by making a side surface of the optical element as a diffusing surface, or by providing a side surface of the optical element with a light absorbing film or with an antireflection coating.

摘要翻译： 图像显示装置包括用于提供照明光的光源，用于将照明光反射和调制成图像光的反射显示元件，用于将照明光引导到反射显示元件的第一光学系统和用于引导的第二光学系统 图像向观察者发光。 特别地，第一光学系统具有光学元件，其包括照射光入射的第一表面，用于全反射入射在第一表面上的光的第二表面和由第二表面全反射的光的第三表面 朝向反射显示元件出现。 第一光学系统被布置成使得图像光再次入射到光学元件上的第三表面并从第二表面朝向第二光学系统出射。 光学元件具有防止不必要的光被引导到观察者的功能，通过使光学元件的侧表面作为漫射表面，或者通过提供光学元件的侧表面具有光吸收膜或具有抗反射 涂层。

公开(公告)号：US06552854B2

公开(公告)日：2003-04-22

申请号：US09842057

申请日：2001-04-26

申请人： Junko Kuramochi ,  Atsushi Okuyama ,  Takashi Sudo

发明人： Junko Kuramochi ,  Atsushi Okuyama ,  Takashi Sudo

IPC分类号： G02B2714

CPC分类号： G02B27/0172 ,  G02B5/30 ,  G03B13/08

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 said illumination optical system. The projection optical system includes a member for correcting an optical path length difference between rays of the image light caused when the image light is incident on the projection optical system via at least a portion of the illumination optical system.

公开(公告)号：US06814442B2

公开(公告)日：2004-11-09

申请号：US09842124

申请日：2001-04-26

申请人： Atsushi Okuyama ,  Junko Kuramochi ,  Takashi Sudo

发明人： Atsushi Okuyama ,  Junko Kuramochi ,  Takashi Sudo

IPC分类号： G03B2114

CPC分类号： G02B3/0006 ,  G02B5/02 ,  G02B5/30 ,  G02B27/0172 ,  G02B2027/0118

摘要： An image display apparatus includes a light source for supplying illumination light, a reflection type display device which reflects the illumination light and modulates the illumination light into image light, and an illumination optical system for guiding the illumination light to the reflection type display device. The illumination optical system includes a first optical member for directing the illumination light toward the reflection type display device, and a second optical member. The second optical member includes a part generating a secondary light source with the illumination light emitted from the light source, in which the light from the part emerges toward the first optical member, and a reflecting surface which guides illumination light which is not incident directly on the part to the part. In addition, a projection optical system guides the image light to an observer.

公开(公告)号：US20070291344A1

公开(公告)日：2007-12-20

申请号：US11760128

申请日：2007-06-08

申请人： Yu YAMAUCHI ,  Atsushi Okuyama ,  Hiroyuki Kodama ,  Takashi Sudo

发明人： Yu YAMAUCHI ,  Atsushi Okuyama ,  Hiroyuki Kodama ,  Takashi Sudo

IPC分类号： G02B26/08

CPC分类号： G02B3/0062 ,  G02B3/0043 ,  G02B27/0905 ,  G02B27/0961 ,  G03B21/14 ,  G03B21/2073 ,  G03B21/208 ,  H04N9/3105 ,  H04N9/3152

摘要： An optical system for image projection is disclosed which is easy to be manufactured and designed and capable of projecting a bright image with high contrast. The optical system includes an illumination optical system introducing a luminous flux emitted from a light source to an image-forming element through an optical surface having a light-splitting function, and a projection optical system projecting the luminous flux from the image-forming element through the optical surface onto a projection surface. The illumination optical system includes a conversion system which respectively converts the widths of the luminous flux in first and second cross-sections into widths different from those before entering thereinto. Conversion rates in the first and second cross-sections are different from each other.

摘要翻译： 公开了一种用于图像投影的光学系统，其易于制造和设计并且能够投射具有高对比度的明亮图像。 光学系统包括：照明光学系统，其通过具有分光功能的光学表面将从光源发射的光束引入图像形成元件;以及投影光学系统，其将来自图像形成元件的光通量投影到 光学表面到投影表面上。 照明光学系统包括转换系统，其将第一和第二横截面中的光通量的宽度分别转换成与进入之前不同的宽度。 第一和第二横截面的转换率彼此不同。

公开(公告)号：US20070291594A1

公开(公告)日：2007-12-20

申请号：US11759550

申请日：2007-06-07

申请人： Atsushi OKUYAMA ,  Yu Yamauchi ,  Takashi Sudo ,  Ryota Kadowaki

发明人： Atsushi OKUYAMA ,  Yu Yamauchi ,  Takashi Sudo ,  Ryota Kadowaki

IPC分类号： G11B11/00

CPC分类号： G02B27/283 ,  G03B21/14 ,  G03B21/2073 ,  G03B21/208 ,  H04N9/3152

摘要： An optical system for image projection is disclosed which is capable of improving contrast while suppressing reduction of light amount. The optical system includes a converging optical system, and a polarization beam splitting surface transmitting an incoming light flux having a first polarization direction from the converging optical system, to introduce it to the image-forming element and causing light having a second polarization direction, of an outgoing light flux from the image-forming element, to proceed to a projection optical system. In a first cross-section parallel to a normal to the polarization beam splitting surface, the converging optical system has a configuration causing an incident angle on the splitting surface of a light ray passing through a barycenter of intensity distribution of the outgoing light flux to be larger than an incident angle thereon of a light ray passing through a barycenter of intensity distribution of the incoming light flux.

摘要翻译： 公开了一种用于图像投影的光学系统，其能够在抑制光量减少的同时改善对比度。 光学系统包括会聚光学系统和偏振光束分离表面，透射来自会聚光学系统的具有第一偏振方向的入射光束，将其引入图像形成元件并使具有第二偏振方向的光具有 来自图像形成元件的输出光束，以前进到投影光学系统。 在与偏振光束分离面的法线平行的第一截面中，会聚光学系统具有使通过出射光束的强度分布的重心的光线的分离面的入射角为 大于通过入射光束的强度分布的重心的光线的入射角。

公开(公告)号：US20070085971A1

公开(公告)日：2007-04-19

申请号：US11539230

申请日：2006-10-06

申请人： Atsushi Okuyama ,  Takashi Sudo

发明人： Atsushi Okuyama ,  Takashi Sudo

IPC分类号： G03B21/14

CPC分类号： G02B27/283 ,  G03B21/2073 ,  G03B21/208 ,  H04N9/3105 ,  H04N9/3167

摘要： An illumination optical system is disclosed which capable of uniformly illuminating a surface to be illuminated. The illumination optical system comprises a polarization conversion element which converts a luminous flux from a light source into a luminous flux having a certain polarization direction, a polarization beam splitter which splits the luminous flux from the polarization conversion element, and a phase plate which gives a phase difference to the luminous flux from the polarization beam splitter. The system illuminates the surface with the luminous flux from the phase plate and satisfies the conditions θx

摘要翻译： 公开了一种照明光学系统，其能够均匀照射被照射的表面。 照明光学系统包括将来自光源的光通量转换为具有一定偏振方向的光束的偏振转换元件，分离来自偏振转换元件的光束的偏振光束分离器，以及相位板，其给出 与偏振分束器的光通量的相位差。 该系统利用相位板的光通量照射表面，并满足