首页> 外国专利> MODIFYING THE OUTPUT OF A LASER TO ACHIEVE A FLAT TOP IN THE LASER'S GAUSSIAN BEAM INTENSITY PROFILE

MODIFYING THE OUTPUT OF A LASER TO ACHIEVE A FLAT TOP IN THE LASER'S GAUSSIAN BEAM INTENSITY PROFILE

机译:修改激光输出以达到激光高斯光束强度轮廓中的平顶

摘要

A laser beam is periodically deflected before being directed into a sample volume. The beam is deflected at a frequency such that the beam makes one or more passes through the sample volume while data are collected from the sample volume. The amplitude of motion of the beam, the dwell time of the beam at any given point, and the Gaussian intensity profile of the beam cooperate to produce an effective flat topped illumination profile for the light that is incident on specimens in the sample volume. The total photon exposure at any given point in the sample volume is a function of both the beam intensity and the dwell time at that location. Therefore, a longer dwell time and lower intensity at the edge of the profile are in balance with a shorter dwell time and higher intensity at the center of the profile.
机译:激光束在被引导进入样品空间之前会定期偏转。光束以一定频率偏转,使得光束使一个或多个通过样品体积,同时从样品体积中收集数据。光束的运动幅度,光束在任何给定点的停留时间以及光束的高斯强度轮廓共同为入射在样品体积中的样本上的光产生有效的平顶照明轮廓。样品体积中任何给定点的总光子曝光量是该位置处的光束强度和停留时间的函数。因此,较长的停留时间和轮廓边缘处的较低强度与较短的停留时间和轮廓中心处较高的强度是平衡的。

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