公开(公告)号：US5952818A

公开(公告)日：1999-09-14

申请号：US739099

申请日：1996-10-25

申请人： Xi-Cheng Zhang ,  Louis Francis Libelo ,  Qi Wu

发明人： Xi-Cheng Zhang ,  Louis Francis Libelo ,  Qi Wu

IPC分类号： G01R29/08 ,  G01R31/00

CPC分类号： G01R29/0885

摘要： Apparatus and methods for characterizing free-space electromagnetic energy, and in particular, apparatus/method suitable for real-time two-dimensional far-infrared imaging applications are presented. The sensing technique is based on a non-linear coupling between a low-frequency electric field and a laser beam in an electro-optic crystal. In addition to a pratical counter-propagating sensing technique, a co-linear approach is described which provides longer radiated field--optical beam interaction length, thereby making imaging applications practical.

摘要翻译： 提出了表征自由空间电磁能的装置和方法，特别是适用于实时二维远红外成像应用的装置/方法。 感测技术基于电光晶体中低频电场与激光束之间的非线性耦合。 除了实际的反向传播感测技术之外，还描述了提供更长的辐射场 - 光束相互作用长度的共线方法，从而使成像应用成为实用的。