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公开(公告)号：US4221463A
公开(公告)日：1980-09-09
申请号：US038352
申请日：1979-05-11
申请人： Edward Barsack , Arthur A. Chabot , Clarke E. Harris , Donald A. Kawachi , William A. Richardson
发明人： Edward Barsack , Arthur A. Chabot , Clarke E. Harris , Donald A. Kawachi , William A. Richardson
CPC分类号： G01S17/95 , G02F1/0322
摘要： Ringing caused by acoustic resonances in an electro-optical crystal modulator and commencing at the trailing edge of a pulse may be suppressed by the combination of a second electro-optical crystal and a polarizer. The polarization of the ringing passing through the second crystal is rotated 90.degree. by applying an appropriate voltage to the second crystal at the trailing edge of the pulse. The polarizer, properly oriented, then blocks the ringing. The crystals may comprise such materials as Cadmium Telluride or Gallium Arsenide.
摘要翻译： 可以通过第二电光晶体和偏振器的组合来抑制由电光晶体调制器中的声共振引起的振荡并且在脉冲的后沿开始的振铃。 穿过第二晶体的振铃的极化通过在脉冲的后缘处向第二晶体施加适当的电压而旋转90°。 偏振器正确定向，然后阻止振铃。 晶体可以包括诸如碲化镉或砷化镓的材料。
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公开(公告)号：US3958881A
公开(公告)日：1976-05-25
申请号：US90526
申请日：1970-11-18
摘要： In a laser system, the method of operating a laser simultaneously as an oscillator to produce a beam of coherent light and as an amplifier for backscattered light from targets illuminated by the coherent light in such beam is disclosed.
摘要翻译： 在激光系统中，公开了作为振荡器同时操作激光以产生相干光束的方法，并且用作用于由该光束中的相干光照射的目标的后向散射光的放大器的方法。
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公开(公告)号：US5438449A
公开(公告)日：1995-08-01
申请号：US125519
申请日：1987-11-25
CPC分类号： G01C21/00 , G01S7/4814 , G01S7/4817 , G02B26/08 , G02B5/122
摘要： An optical beam switch is disclosed for sequentially pointing a laser beam to a plurality of terrestrial target locations at predetermined depression angles and at angular positions relative to a reference direction. The switch includes a CW laser whose collimated output beam is directed into a rotating retroreflector. The moving beam reflected therefrom describes a continuous circular path across the upper surface of a beam deflection device. The beam deflection device comprises a plurality of beam refracting prisms. The index of refraction and angulation of each prism determines the depression angle and azimuthal angle of the deflected beam. The depression angle is held precisely constant as the incident beam describes its arcuate path across the upper surface of the prism. The retroreflector may comprise three mutually-perpendicular mirrors, joined at a vertex, for providing a reflected beam parallel to and displaced from the incident beam. Alternatively, the retroreflector may comprise a triple mirror prism.
摘要翻译： 公开了一种光束开关，用于将激光束以预定的下倾角和相对于参考方向的角位置顺序地指向多个地面目标位置。 该开关包括一个CW激光器，其准直的输出光束被引导到旋转后向反射器中。 从其反射的移动光束描述了横过光束偏转装置的上表面的连续圆形路径。 光束偏转装置包括多个光束折射棱镜。 每个棱镜的折射率和角度决定了偏转光束的俯角和方位角。 当入射光束描述穿过棱镜上表面的弧形路径时，凹陷角保持精确恒定。 后向反射器可以包括在顶点处连接的三个相互垂直的反射镜，用于提供平行于入射光束并从入射光束移位的反射光束。 或者，后向反射器可以包括三镜棱镜。
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