GB/T 37275-2018 in English

3.1 Practical application case of processing technology requirements

Take Nd:YAG laser rod as an example. In actual measurement, its end face parallelism and verticality directly affect the beam quality. For example, if the end face parallelism is better than or equal to $10''$ and the verticality is better than or equal to $5'$, the stability of the laser output can be ensured. It is recommended to strictly control these parameters during the processing process and use interferometer for regular detection.

3.2 Importance of safety precautions

During testing, protective glasses that meet safety standards (such as ISO 1254-1) must be worn, and ensure that the equipment is equipped with a visible light indication system. Especially for high-energy pulsed lasers, direct observation of the laser beam or reflected light should be avoided.

3.3 Selection and calibration of measuring devices

When selecting a measuring device, ensure that it meets the performance indicators required by the standard (such as the reflectivity of a total mirror ≥99.8%). It is recommended to calibrate the power meter and energy meter regularly to ensure the accuracy of the measurement results. For example, the thermoelectric power meter used in continuous laser testing should have an uncertainty of ≤5%.