公开(公告)号：US6130786A

公开(公告)日：2000-10-10

申请号：US340141

申请日：1999-06-28

申请人： Atsuo Osawa ,  Hiroki Yoshikawa ,  Shigeru Mori ,  Naoyuki Ogura

发明人： Atsuo Osawa ,  Hiroki Yoshikawa ,  Shigeru Mori ,  Naoyuki Ogura

IPC分类号： G02B9/60 ,  G02B13/18 ,  G02B13/24 ,  G02B3/00

CPC分类号： G02B9/60 ,  G02B13/18 ,  G02B13/24

摘要： An image display device which is compact on the whole and low in cost, and which uses a plurality of projection lens systems each of which is constituted by five lens groups including a first aspherical lens group, a second aspherical lens group, a third biconvex lens group, a fourth aspherical lens group and a fifth aspherical lens group which are arranged in this order successively from a screen side, the third lens group having refractive power of not lower than 70% of the total power of the projection lens system, the respective peripheral shapes of the first and second aspherical lens groups being set to have a predetermined relation, a low-dispersion high-index glass material being used for a convex lens of a green projection lens system, a high-dispersion high-index glass material being used for convex lenses of blue and red projection lens systems.

摘要翻译： 一种整体紧凑且成本低的图像显示装置，其使用多个投影透镜系统，每个投影透镜系统由包括第一非球面透镜组，第二非球面透镜组，第三双凸透镜的五个透镜组构成 组，第四非球面透镜组和第五非球面透镜组，其从屏幕侧依次排列，第三透镜​​组的折射力不小于投影透镜系统的总功率的70％，折射率不小于投影透镜系统的总功率的70％ 第一非球面透镜组和第二非球面透镜组的周边形状被设定为具有预定关系，低分散高折射率玻璃材料用于绿色投影透镜系统的凸透镜，高分散高折射率玻璃材料为 用于蓝色和红色投影透镜系统的凸透镜。