公开(公告)号：US06768594B2

公开(公告)日：2004-07-27

申请号：US10113337

申请日：2002-03-28

申请人： Daisuke Imafuku ,  Naoyuki Ogura ,  Kazunari Nakagawa ,  Koji Hirata ,  Hidehiro Ikeda ,  Shuji Kato

发明人： Daisuke Imafuku ,  Naoyuki Ogura ,  Kazunari Nakagawa ,  Koji Hirata ,  Hidehiro Ikeda ,  Shuji Kato

IPC分类号： G02B300

CPC分类号： G02B13/08

摘要： In a projection lens, there are arranged in order from a screen side, a first lens group including a meniscus lens having a convex lens surface in a central portion toward a screen with refracting power, a second lens group including a lens having a convex lens surface in a central portion toward a video generating source, a third lens group including a lens having convex lens surfaces in both sides with positive refracting power, a fourth lens group including a lens having a convex lens surface in a central portion toward the video generating source with positive refracting power, and a fifth lens group including a lens having a concave lens surface toward the screen with negative refracting power. An entrance pupil is arranged between incident and emitting surfaces of a power lens.

摘要翻译： 在投影透镜中，从屏幕侧依次配置第一透镜组，第一透镜组包括具有中心部分的具有折射力的屏幕的凸透镜表面的弯月形透镜;第二透镜组，包括具有凸透镜的透镜 在朝向视频产生源的中心部分中的表面;第三透镜组，包括具有正折射力的两侧具有凸透镜表面的透镜;第四透镜组，包括在朝向视频产生的中心部分具有凸透镜表面的透镜 具有正折射力的源;以及第五透镜组，包括具有朝向屏幕的凹透镜表面的透镜，具有负折射率。 入射光瞳配置在功率透镜的入射面和发射面之间。

公开(公告)号：US07172292B2

公开(公告)日：2007-02-06

申请号：US10865549

申请日：2004-06-09

申请人： Hidehiro Ikeda ,  Shuji Kato ,  Koji Hirata ,  Naoyuki Ogura

发明人： Hidehiro Ikeda ,  Shuji Kato ,  Koji Hirata ,  Naoyuki Ogura

IPC分类号： G03B21/14 ,  G02B17/00

CPC分类号： G02B13/02

摘要： An inexpensive projection lens unit in a rear projection type image display system, having a short focal distance (wide angle of viewing field), high focus and high contrast, and as well, including a power lens made of a glass material having a high refractive index in a range from 1.63 to 1.70 and an Abbe's number of not less than 50 with an optimized incident and emergent configuration in order to satisfactorily correct aberration with a enhanced focusing performance even with a shortened focal distance. Further, the power lens having a high refractive index can exhibit a high power, and accordingly, can carry out satisfactory aberration correction by optimizing the aspheric degree of a plastic lens even though the length of back focus is increased for enhancing the contrast.

摘要翻译： 背投影型图像显示系统中的廉价的投影透镜单元，具有短焦距（观察视角宽），高焦距和高对比度，并且还包括由具有高折射率的玻璃材料制成的功率透镜 指数在1.63至1.70之间，阿贝数不少于50，具有优化的入射和紧急配置，以便即使缩短焦距也能以更好的聚焦性能令人满意地校正像差。 此外，具有高折射率的功率透镜可以表现出高功率，因此，即使增加后焦距的长度以增强对比度，也可以通过优化塑料透镜的非球面度来进行令人满意的像差校正。

公开(公告)号：US07347566B2

公开(公告)日：2008-03-25

申请号：US11649544

申请日：2007-01-03

申请人： Hidehiro Ikeda ,  Shuji Kato ,  Koji Hirata ,  Naoyuki Ogura

发明人： Hidehiro Ikeda ,  Shuji Kato ,  Koji Hirata ,  Naoyuki Ogura

IPC分类号： G03B21/14 ,  G02B17/00

CPC分类号： G02B13/02

摘要： An inexpensive projection lens unit in a rear projection type image display system, having a short focal distance (wide angle of viewing field), high focus and high contrast, and as well, including a power lens made of a glass material having a high refractive index in a range from 1.63 to 1.70 and an Abbe's number of not less than 50 with an optimized incident and emergent configuration in order to satisfactorily correct aberration with a enhanced focusing performance even with a shortened focal distance. Further, the power lens having a high refractive index can exhibit a high power, and accordingly, can carry out satisfactory aberration correction by optimizing the aspheric degree of a plastic lens even though the length of back focus is increased for enhancing the contrast.

摘要翻译： 背投影型图像显示系统中的廉价的投影透镜单元，具有短焦距（观察视角宽），高焦距和高对比度，并且还包括由具有高折射率的玻璃材料制成的功率透镜 指数在1.63至1.70之间，阿贝数不少于50，具有优化的入射和紧急配置，以便即使缩短焦距也能以更好的聚焦性能令人满意地校正像差。 此外，具有高折射率的功率透镜可以表现出高功率，因此，即使增加后焦距的长度以增强对比度，也可以通过优化塑料透镜的非球面度来进行令人满意的像差校正。

公开(公告)号：US20050259228A1

公开(公告)日：2005-11-24

申请号：US11060251

申请日：2005-02-18

申请人： Yuriko Inadachi ,  Shuji Kato ,  Hidehiro Ikeda ,  Naoyuki Ogura ,  Koji Hirata

发明人： Yuriko Inadachi ,  Shuji Kato ,  Hidehiro Ikeda ,  Naoyuki Ogura ,  Koji Hirata

IPC分类号： G02B13/16 ,  G02B13/18 ,  G03B21/00 ,  G03B21/10 ,  G03B21/20 ,  G03B21/22

CPC分类号： G02B13/16 ,  G02B13/18 ,  G03B21/10 ,  G03B21/20

摘要： For a projection lens apparatus having a six-group structure that enlarges and projects an image displayed on a projection tube, an appropriate distance is maintained between a power lens and an aspherical lens group that is located near a power lens on the image generation source side, and physical interference with the power lens is eliminated, so that productivity is increased while a cost reduction is achieved. A meniscus lens that has a concave face directed toward a screen and has a refracting power is employed as an aberration correction lens (fourth group lens 4) that is located near the power lens (third group lens 3) on the image generation source side. Further, the lens surface of the meniscus lens on the screen side has an aspherical shape, so that a curvature is increased from the light axis to a predetermined point located between the light axis and the outer edge, and is reduced from the predetermined point to the outer edge. Furthermore, an inexpensive low refractive index material that has an Abbe number (νd) of 57 or higher and a refractive index (nd) of 1.500 or lower and that has superior flowability is employed as the base material for the fourth group lens that is located nearest the glass power lens on the image generation source side.

摘要翻译： 对于具有六组结构的投影透镜装置，其放大并投影显示在投影管上的图像，在功率透镜和位于图像生成源侧的功率透镜附近的非球面透镜组之间保持适当的距离 并且消除了与功率透镜的物理干扰，从而在实现成本降低的同时提高了生产率。 使用具有朝向屏幕的凹面并具有折射光焦度的弯月形透镜作为位于图像产生源侧的功率透镜（第三组透镜3）附近的像差校正透镜（第四组透镜4）。 此外，屏幕侧的弯月透镜的透镜表面具有非球面形状，使得曲率从光轴增加到位于光轴和外边缘之间的预定点，并且从预定点减小到 外边缘。 此外，使用阿贝数（nud）为57以上且折射率（nd）为1.500以下且具有优异的流动性的便宜的低折射率材料作为位于第四组透镜的基材 最靠近图像生成源侧的玻璃功率透镜。

公开(公告)号：US07404646B2

公开(公告)日：2008-07-29

申请号：US11060251

申请日：2005-02-18

申请人： Yuriko Inadachi ,  Shuji Kato ,  Hidehiro Ikeda ,  Naoyuki Ogura ,  Koji Hirata

发明人： Yuriko Inadachi ,  Shuji Kato ,  Hidehiro Ikeda ,  Naoyuki Ogura ,  Koji Hirata

IPC分类号： G03B21/20 ,  G03B9/00

CPC分类号： G02B13/16 ,  G02B13/18 ,  G03B21/10 ,  G03B21/20

摘要： A projection lens apparatus includes a plurality of lenses, for enlarging and projecting, onto a screen, an original image displayed on an image generation source. The plurality of lenses are arranged, beginning with the lens nearest the screen, as first to sixth lens groups. The fourth lens group includes one meniscus lens that has a positive refracting power and has a concave lens surface directed toward the screen. The concave lens surface of the meniscus lens included in the fourth group lens has a curvature in the vicinity of an outer portion of the concave lens surface that is smaller than a curvature in a predetermined area of the concave lens surface defined between a light axis of the concave lens surface of the meniscus lens and the smaller curvature of the concave lens surface in the vicinity of the outer portion of the concave lens surface.

摘要翻译： 投影透镜装置包括多个透镜，用于将显示在图像产生源上的原始图像放大并投影到屏幕上。 多个透镜从最靠近屏幕的透镜开始设置为第一至第六透镜组。 第四透镜组包括具有正折射率的一个弯月形透镜，并且具有指向屏幕的凹透镜表面。 包括在第四组透镜中的凹凸透镜的凹透镜表面在凹透镜表面的外部附近具有小于在凹透镜表面的预定区域中的曲率的曲率，所述凹透镜表面的光轴 凹透镜的凹透镜表面和凹透镜表面在凹透镜表面的外部附近的较小曲率。

公开(公告)号：US20070109666A1

公开(公告)日：2007-05-17

申请号：US11649544

申请日：2007-01-03

申请人： Hidehiro Ikeda ,  Shuji Kato ,  Koji Hirata ,  Naoyuki Ogura

发明人： Hidehiro Ikeda ,  Shuji Kato ,  Koji Hirata ,  Naoyuki Ogura

IPC分类号： G02B15/14

CPC分类号： G02B13/02

摘要： An inexpensive projection lens unit in a rear projection type image display system, having a short focal distance (wide angle of viewing field), high focus and high contrast, and as well, including a power lens made of a glass material having a high refractive index in a range from 1.63 to 1.70 and an Abbe's number of not less than 50 with an optimized incident and emergent configuration in order to satisfactorily correct aberration with a enhanced focusing performance even with a shortened focal distance. Further, the power lens having a high refractive index can exhibit a high power, and accordingly, can carry out satisfactory aberration correction by optimizing the aspheric degree of a plastic lens even though the length of back focus is increased for enhancing the contrast.

公开(公告)号：US20050052628A1

公开(公告)日：2005-03-10

申请号：US10865549

申请日：2004-06-09

申请人： Hidehiro Ikeda ,  Shuji Kato ,  Koji Hirata ,  Naoyuki Ogura

发明人： Hidehiro Ikeda ,  Shuji Kato ,  Koji Hirata ,  Naoyuki Ogura

IPC分类号： G02B13/16 ,  G02B13/02 ,  G02B13/18 ,  G03B21/14 ,  G03B21/20

CPC分类号： G02B13/02

摘要： An inexpensive projection lens unit in a rear projection type image display system, having a short focal distance (wide angle of viewing field), high focus and high contrast, and as well, including a power lens made of a glass material having a high refractive index in a range from 1.63 to 1.70 and an Abbe's number of not less than 50 with an optimized incident and emergent configuration in order to satisfactorily correct aberration with a enhanced focusing performance even with a shortened focal distance. Further, the power lens having a high refractive index can exhibit a high power, and accordingly, can carry out satisfactory aberration correction by optimizing the aspheric degree of a plastic lens even though the length of back focus is increased for enhancing the contrast.

摘要翻译： 背投影型图像显示系统中的廉价的投影透镜单元，具有短焦距（观察视角宽），高焦距和高对比度，并且还包括由具有高折射率的玻璃材料制成的功率透镜 指数在1.63至1.70之间，阿贝数不少于50，具有优化的入射和紧急配置，以便即使缩短焦距也能以更好的聚焦性能令人满意地校正像差。 此外，具有高折射率的功率透镜可以表现出高功率，因此，即使增加后焦距的长度以增强对比度，也可以通过优化塑料透镜的非球面度来进行令人满意的像差校正。

公开(公告)号：US20120081676A1

公开(公告)日：2012-04-05

申请号：US13251431

申请日：2011-10-03

申请人： Koji HIRATA ,  Masahiko Yatsu ,  Naoyuki Ogura ,  Hidehiro Ikeda

发明人： Koji HIRATA ,  Masahiko Yatsu ,  Naoyuki Ogura ,  Hidehiro Ikeda

IPC分类号： G03B21/14

CPC分类号： G02B13/18 ,  G02B7/022 ,  G02B13/16

摘要： There is provided a projection image display apparatus which is excellent in quality of a display screen image even if a projection lens using a plastic lens having an asymmetrical shape with respect to an optical axis is used. The apparatus includes a projection lens which obliquely projects video light on a screen, an integrator which aligns a polarization direction of light from a light source, and an image display element (P, PL) which modulates light having the aligned polarization direction by an image signal. The projection lens includes multiple plastic lenses, and each of the multiple plastic lenses is arrayed, respectively, by shifting a gate direction to each other by 180 degrees. When the projection lens includes n sheets (n is a natural number) of plastic lenses, each of the multiple plastic lenses may be arrayed, respectively, by shifting a gate direction to each other by (360/n) degrees.

摘要翻译： 提供了即使使用具有相对于光轴具有不对称形状的塑料透镜的投影透镜，显示屏图像的质量也优异的投影图像显示装置。 该装置包括将视频光倾斜地投影在屏幕上的投影透镜，使来自光源的光的偏振方向对准的积分器和通过图像调制具有排列的偏振方向的光的图像显示元件（P，PL） 信号。 投影透镜包括多个塑料透镜，并且通过将栅极方向彼此移动180度来分别排列多个塑料透镜中的每一个。 当投影透镜包括n个塑料透镜的n个片（n个是自然数）时，通过将栅极方向彼此移动（360 / n）度，可以分别排列多个塑料透镜中的每一个。

公开(公告)号：US07081927B2

公开(公告)日：2006-07-25

申请号：US10978528

申请日：2004-11-02

申请人： Koji Hirata ,  Naoyuki Ogura ,  Masahiko Yatsu ,  Hidehiro Ikeda

发明人： Koji Hirata ,  Naoyuki Ogura ,  Masahiko Yatsu ,  Hidehiro Ikeda

IPC分类号： H04N9/31 ,  G02E1/135

CPC分类号： H04N9/3141 ,  G02B13/16 ,  G03B21/10 ,  H04N5/7441 ,  H04N9/3108 ,  H04N9/3144 ,  H04N9/317

摘要： An optical projection apparatus includes an optical lighting system provided with a polarized beam splitter for polarizing white light flux from a white light source and combining the white light flux with other light fluxes, thereby taking out a predetermined polarized wave; a multi-lens array consisting of a plurality of lens elements; and an irradiator for separating the white light flux into three primary color light fluxes of red, green, and blue and irradiating each of the three color light fluxes on the same display element at an angle different from the others; and a projecting lens unit used for projecting the three primary color light fluxes modulated by the display element. Color light fluxes modulated by the display element are separated in a horizontal direction of the screen of the display element when passing an injection pupil of the projection lens unit.

公开(公告)号：US06956624B2

公开(公告)日：2005-10-18

申请号：US10447999

申请日：2003-05-30

申请人： Koji Hirata ,  Naoyuki Ogura ,  Masahiko Yatsu ,  Hidehiro Ikeda

发明人： Koji Hirata ,  Naoyuki Ogura ,  Masahiko Yatsu ,  Hidehiro Ikeda

IPC分类号： G02B5/26 ,  G02B5/30 ,  G02B13/16 ,  G02B13/18 ,  G02B13/22 ,  G02F1/13 ,  G02F1/1335 ,  G03B21/00 ,  G03B21/10 ,  G03B33/12 ,  H04N5/74 ,  H04N9/31 ,  H04N5/64

CPC分类号： H04N9/3141 ,  G02B13/16 ,  G03B21/10 ,  H04N5/7441 ,  H04N9/3108 ,  H04N9/3144 ,  H04N9/317

摘要： An optical projection apparatus includes an optical lighting system provided with a polarized beam splitter for polarizing a white light flux received from a white light source and combining the white light flux with other light fluxes, thereby taking out a predetermined polarized wave; a multi-lens array consisting of a plurality of lens elements; and an irradiator for separating the white light flux into three primary color light fluxes of red, green, and blue and irradiating each of the three color light fluxes on the same display element at an angle different from the others; and a projector for projecting the three primary color light fluxes modulated by the display element. The optical lighting system and the projector are disposed between the white light source and the display element.

摘要翻译： 光学投影装置包括：光学照明系统，设置有偏振分束器，用于偏振从白色光源接收的白色光束，并将白色光束与其他光束组合，从而取出预定的偏振波; 由多个透镜元件组成的多透镜阵列; 以及用于将白光束分离为红色，绿色和蓝色的三原色光束的照射器，并且以与其它不同的角度在同一显示元件上照射三种颜色光束中的每一种; 以及用于投影由显示元件调制的三原色光束的投影仪。 光学照明系统和投影仪设置在白色光源和显示元件之间。