Light-in-flight recording. 5: Theory of slowing down the faster-than-light motion of the light shutter.
Light-in-flight recording. 5: Theory of slowing down the faster-than-light motion of the light shutter.
复制标题
飞行中的光记录。
DOI：
10.1364/ao.28.000759
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发表时间：
1989
期刊：
影响因子：
1.9
通讯作者：
Hakan Bergstrom
中科院分区：
文献类型：
--
作者：
Nils Abramson;Sven;Hakan Bergstrom
通过全息术进行的飞行中的光记录使用皮秒脉冲作为参考光束，该参考光束像一片光一样与全息图板相交并产生灵敏度区域，该灵敏度区域以比光快的速度在板上移动，就像光快门一样。然而，如果通过光栅中的衍射的参考脉冲的前部相对于其运动方向倾斜，则光快门的速度可以减慢，导致记录时间增加。使用反射光栅的实际结果是对应于二比一的时间压缩的真实记录。为了最大限度地减少记录的脉冲形状的失真，我们研究了明显的（椭圆形）和真正的（球形）波前是相同的交叉点。
Light-in-flight recording by holography uses a picosecond pulse for the reference beam, which like a sheet of light intersects the hologram plate and produces a sensitivity area that with a speed faster than light moves over the plate like a light shutter. If, however, the front of the reference pulse by diffraction in a grating is tilted relative to its direction of motion, the velocity of the light shutter can be slowed down resulting in increased recording time. The practical result using a reflection grating was a true recording that corresponded to a time compression of two to one. To minimize distortions of the recorded pulse shape we studied intersections that are identical for apparent (ellipsoidal) and true (spheroidal) wavefronts.