公开(公告)号：US5426521A

公开(公告)日：1995-06-20

申请号：US995507

申请日：1992-12-22

申请人： Jun Chen ,  Guanming Lai ,  Kazuo Ishizuka ,  Akira Tonomura

发明人： Jun Chen ,  Guanming Lai ,  Kazuo Ishizuka ,  Akira Tonomura

IPC分类号： G02B27/00 ,  G02B27/46 ,  G02F1/13 ,  G02F1/139 ,  G03H1/00 ,  G03H1/22 ,  G03H5/00 ,  G03H1/08 ,  G03H1/16

CPC分类号： G02B27/0025 ,  G02B27/46 ,  G03H1/2205 ,  G02F1/1393 ,  G02F2203/18 ,  G03H1/0005 ,  G03H1/2294 ,  G03H2001/2207 ,  G03H2223/54 ,  G03H2223/55 ,  G03H2225/32

摘要： A method of and apparatus for efficiently correcting an aberration of an optical system used to record a hologram at the stage of reconstructing an image of the hologram. At the stage of reconstructing an image of a hologram (3), which contains the record of interference fringes formed by a reference plane wave and an object wave modulated by a sample, by applying a plane wave for reconstruction to the hologram (3) from a laser (1), an aberration of an optical system used to record the hologram (3) is canceled by the phase distribution on a liquid crystal panel (6) having a spatial phase modulation function, which is disposed on the Fourier transform plane, thereby correcting the aberration. The phase distribution on the liquid crystal panel (6) can be changed flexibly by a computer (9) in accordance with the aberration coefficients or degree of defocusing of the recording optical system.

摘要翻译： 一种用于在重建全息图像的阶段有效地校正用于记录全息图的光学系统的像差的方法和装置。 在重建包含由参考平面波形成的干涉条纹和由样本调制的物体波的记录的全息图（3）的阶段，通过将重构的平面波应用于全息图（3）从 激光器（1）中，用于记录全息图（3）的光学系统的像差被设置在傅立叶变换平面上的具有空间相位调制函数的液晶面板（6）上的相位分布所抵消， 从而校正像差。 可以通过计算机（9）根据记录光学系统的像差系数或散焦程度灵活地改变液晶面板（6）上的相位分布。

公开(公告)号：US07203411B1

公开(公告)日：2007-04-10

申请号：US10568062

申请日：2004-08-10

申请人： Xiaoqing Jiang ,  Yuying Wu ,  Minghua Wang ,  Guanming Lai

发明人： Xiaoqing Jiang ,  Yuying Wu ,  Minghua Wang ,  Guanming Lai

IPC分类号： G02B6/26 ,  G02B6/42

CPC分类号： G02F1/0147 ,  G02F1/3137 ,  G02F2203/48

摘要： A thermo optical type variable optical attenuator suitable for application in an array type variable optical attenuator that realizes low crosstalk between neighboring waveguides in the array is provided. A thermo optical type variable optical attenuator 100 using optical material having negative optical effect provides a multimode optical propagating part 3 disposed via a tapered part 2 and a tapered part 7 between single mode optical waveguides 1 and 8. A thin-film heater 4 is disposed above the multimode optical propagating part 3 at an angle of inclination β in relation to the direction of light propagation along a first optical waveguide 50. Moreover, a second optical waveguide 9 optically coupled with a side face 3S1 of the multimode optical propagating part 3 is provided at an angle of inclination 2β in relation to the direction of light propagation along the first optical waveguide 50.

摘要翻译： 提供了一种适用于实现阵列中相邻波导之间的低串扰的阵列型可变光衰减器的热光学型可变光衰减器。 使用具有负光学效果的光学材料的热光学型可变光衰减器100提供经由锥形部分2设置的多模光学传播部分3和在单模光波导1和8之间的锥形部分7。 薄膜加热器4相对于沿着第一光波导50的光传播方向以相对于倾斜角β的角度设置在多模光学传播部分3的上方。 此外，与多模光学传播部分3的侧面3 S1光学耦合的第二光波导9相对于沿着第一光波导50的光传播方向以倾斜角ββ设置。