Main task of our subject is to detect the incident laser beam. And it is required to get its wavelength and incident angle.

本课题的主要任务是对制导激光束的探测，要求能够计算出入射激光的波长和入射角。

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A method of measurement of bubble diameter in the prism is given. The measured diameter direction is incident laser beam direction.

提出一种测量固态透明物质中气泡直径的方法，所测气泡直径的方向应为入射激光束的方向。

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Placing a diffractive optical element(DOE) on the incident laser beam to improve the depth of focus, the DOE'S aperture is variable.

在入射光束的孔径受限制的情况下，利用衍射光学元件来增加激光束的焦深。

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Later that evening the police helicopter also had a laser beam shone on it, when it was sent to investigate the earlier incident.

BBC: Youth sentenced over passenger plane laser pen incident