公开(公告)号：US5592314A

公开(公告)日：1997-01-07

申请号：US353205

申请日：1994-12-01

申请人： Yasuyuki Ogasawara ,  Yoshihiko Watanabe

发明人： Yasuyuki Ogasawara ,  Yoshihiko Watanabe

IPC分类号： G02F1/13 ,  G02F1/1347 ,  G02F1/139 ,  G02F1/21 ,  G02F1/1335 ,  G01B9/02

CPC分类号： G02F1/13473 ,  G02F1/1396 ,  G02F2001/213

摘要： A tunable wavelength filter is independent of the polarization. The filter includes first and second liquid crystal layers. Each liquid crystal layer includes two opposing glass substrates on which transparent electrodes, dielectric mirrors and alignment layers are coated in this order, respectively, and a liquid crystal interposed between the opposing alignment layers. In the first liquid crystal layer, the molecule alignment of the liquid crystal is twisted by n.pi./2 radian to one twisting direction where n is a positive uneven number. In the second liquid crystal layer, the molecule alignment of the liquid crystal is twisted by -n.pi./2 radian to the twisting direction. The first and second crystal layers are laid to overlap each other so that an axis of liquid crystal molecules on the emission side of the first liquid layer is perpendicular to an axis of liquid crystal molecules on the incidence side of the second liquid crystal layer.

摘要翻译： 可调波长滤波器与极化无关。 该过滤器包括第一和第二液晶层。 每个液晶层包括两个相对的玻璃基板，其上分别以其顺序涂覆有透明电极，电介质反射镜和取向层，以及插入在相对的取向层之间的液晶。 在第一液晶层中，液晶的分子对准被n pi / 2弧度扭转到一个扭转方向，其中n是正的不均匀数。 在第二液晶层中，液晶的分子取向以扭转方向扭转-ππ/ 2弧度。 第一和第二晶体层被放置成彼此重叠，使得第一液体层的发射侧的液晶分子的轴垂直于第二液晶层的入射侧的液晶分子的轴。