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    • 77. 发明授权
    • Image pickup optical system
    • 摄像光学系统
    • US06278554B1
    • 2001-08-21
    • US09427742
    • 1999-10-27
    • Michiharu ArataniHiroshi Nakanishi
    • Michiharu ArataniHiroshi Nakanishi
    • G02B2714
    • G02B17/086G02B3/0087G02B17/0848
    • An image pickup optical system has an optical element of a transparent, optical material including an entrance surface, at least one reflective surface, and an exit surface. The optical element has an optical power, the image pickup optical system has an image pickup element including a plurality of pixels. On the image pickup element an image is formed by light from an object through the optical element. The optical material is a material having an index change amount &Dgr;n from an absolute dry condition at the temperature of 50° C. to saturation under a circumstance of the temperature being 50° C. and the humidity being 90%, the index change amount &Dgr;n satisfying the following condition: &Dgr;n≦F&dgr;r02/(2f2L) where F is the F-number of the image pickup optical system, f is the focal length of the image pickup optical system, &dgr; is the pitch of the pixels of the image pickup element, L is the optical path length of the optical element along the reference axis, and r0 is half of the length of the optical element along a direction perpendicular to a plane including the reference axis.
    • 摄像光学系统具有包括入射面,至少一个反射面和出射面的透明光学材料的光学元件。 光学元件具有光学功率,图像拾取光学系统具有包括多个像素的图像拾取元件。 在图像拾取元件上,通过光学元件从物体的光形成图像。 光学材料是在温度为50℃,温度为50℃,湿度为90%的情况下,从绝对干燥条件为50℃至饱和的折射率变化量DELTAn的材料,折射率变化量DELTAn 满足以下条件:DELTAn <= Fdeltar02 /(2f2L)其中F是摄像光学系统的F数,f是摄像光学系统的焦距,delta是图像拾取器的像素的间距 元素L是沿着基准轴的光学元件的光程长度,并且r0是沿着垂直于包括基准轴的平面的方向的光学元件的长度的一半。
    • 78. 发明授权
    • Projection-type color liquid crystal display device having non
overlapping pixel images
    • 具有非重叠像素图像的投射型彩色液晶显示装置
    • US6163349A
    • 2000-12-19
    • US870292
    • 1997-06-06
    • Hiroshi NakanishiHiroshi Hamada
    • Hiroshi NakanishiHiroshi Hamada
    • G02F1/13G02F1/1335G02F1/13357G03B21/00G09F9/35H04N5/74H04N9/31G03B21/14
    • H04N9/3108G02F2001/133623
    • A microlens array is provided on a light-outgoing side of a monochromic LCD element having a plurality of pixels each corresponding to any one of the three colors R, G, and B. Microlenses of the microlens array respectively correspond to pixel groups each of which is composed of three pixels corresponding to the three colors R, G, and B, respectively. Light fluxes having passed through the microlens array are converged at an entrance pupil position of a projection lens by a field lens and form pixel enlarged images corresponding to the colors R, G, and B. At the entrance pupil position, there is provided a color filter having color regions which respectively correspond to the colors to which the pixel enlarged images correspond. With this arrangement, it is possible to make a diverging angle smaller, at which light passing through the LCD element and the microlens array and being converged on the projection lens by the field lens is diverged. Therefore, there is no need to make the projection lens have a great diameter. As a result, it is possible to provide a projection-type color LCD device having a single-panel arrangement which can be produced at lower costs.
    • 微透镜阵列设置在具有多个像素的单色LCD元件的光出射侧上,每个像素分别对应于三种颜色R,G和B中的任一种。微透镜阵列的微透镜分别对应于每个像素组 分别由对应于三种颜色R,G和B的三个像素构成。 已经通过微透镜阵列的光束通过场透镜会聚在投影透镜的入射光瞳位置,并形成对应于颜色R,G和B的像素放大图像。在入射光瞳位置处,提供颜色 滤光器具有分别对应于像素放大图像对应的颜色的颜色区域。 通过这种布置,可以使通过LCD元件和微透镜阵列的光通过场透镜会聚在投影透镜上的发散角变小。 因此,不需要使投影透镜具有较大的直径。 结果,可以提供一种投影型彩色LCD装置,其具有可以较低成本生产的单面布置。
    • 80. 发明授权
    • Optical element, method of molding the same, and laser scanning optical
system
    • 光学元件,其成型方法和激光扫描光学系统
    • US6091532A
    • 2000-07-18
    • US652318
    • 1996-05-23
    • Hiroshi NakanishiNorihisa SaitoToshinori AndoHisakazu Morinaga
    • Hiroshi NakanishiNorihisa SaitoToshinori AndoHisakazu Morinaga
    • B29C33/38B29C45/37B29C45/76B29D11/00B29L11/00G02B3/00G02B26/10G02B26/12G02B26/08
    • B29C33/3835B29C45/766B29D11/00009G02B26/124B29L2011/00Y10S425/808
    • It is an object of this invention to provide an optical element molding method capable of correcting local processing errors in an optical element without increasing the size of an apparatus or raising the manufacturing cost. To achieve this object, an optical element molding method includes the first step of setting molding conditions before molding of said optical element, such that a constant shape error is stably formed on an optical function surface of the optical element, the second step of dividing the optical function surface of the optical element to be molded under the molding conditions into a plurality of regions, and approximating the shape error by using a function so that the divided regions are continuous in the boundaries between the regions, the third step of processing the shape of the cavity surface of the optical insert member into a shape by which the constant shape error is canceled, on the basis of the function obtained in the second step, and the fourth step of molding the optical element by using the optical insert member processed in the third step.
    • 本发明的目的是提供一种能够在不增加设备尺寸或提高制造成本的情况下校正光学元件中的局部加工误差的光学元件模制方法。 为了实现该目的,光学元件成型方法包括:在成型前设定成形条件的第一步骤,使得在光学元件的光学功能表面上稳定地形成恒定的形状误差;第二步骤, 在模塑条件下将要模制的光学元件的光学功能表面形成多个区域,并且通过使用功能来近似形状误差,使得分割区域在区域之间的边界中是连续的,处理形状的第三步骤 基于第二步骤中获得的功能,将光学插入构件的空腔表面形成为消除恒定形状误差的形状,以及第四步骤,通过使用加工成的光学插入构件来模制光学元件 第三步。