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Appl Opt. 2015 May 20;54(15):4876-80. doi: 10.1364/AO.54.004876.

Measurement system with high accuracy for laser beam quality.


Presently, most of the laser beam quality measurement system collimates the optical path manually with low efficiency and low repeatability. To solve these problems, this paper proposed a new collimated method to improve the reliability and accuracy of the measurement results. The system accuracy controlled the position of the mirror to change laser beam propagation direction, which can realize the beam perpendicularly incident to the photosurface of camera. The experiment results show that the proposed system has good repeatability and the measuring deviation of M<sup>2</sup> factor is less than 0.6%.


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