What is EN ISO 13146-12:2018

Introduction

The International Organization for Standardization (ISO) has developed a set of standards known as EN ISO 13146 to provide guidelines for the measurement of optical radiation emitted by laser products and systems. EN ISO 13146-12:2018 is one specific standard within this series, focusing on the measurement of beam widths and divergence angles of laser beams.

Scope and Purpose

EN ISO 13146-12:2018 provides a standardized method for determining the beam width and divergence angle of laser beams. This information is essential for assessing the potential hazards associated with laser use and ensuring that appropriate safety measures are in place. The standard outlines the procedures for measuring these parameters and specifies the relevant equipment and calculations.

Measurement Procedures

The standard describes two different methods for measuring beam widths and divergence angles: the knife-edge method and the moving-aperture method. The knife-edge method involves placing an opaque screen perpendicular to the beam axis and scanning it across the beam profile. By analyzing the intensity distribution of the beam, the width and divergence can be calculated. The moving-aperture method utilizes a scanning slit or pinhole aperture that transversely traverses the beam, allowing for similar measurements.

These methods require specialized equipment such as power meters, position sensors, and optical elements like lenses or filters. EN ISO 13146-12:2018 provides detailed guidelines on the selection and calibration of this equipment, ensuring accurate and reliable measurements.

Benefits and Applications

Complying with EN ISO 13146-12:2018 offers several benefits. First and foremost, it helps ensure the safety of laser operators and anyone exposed to laser radiation. By accurately determining the beam widths and divergence angles, potential hazards such as excessive power density or excessive exposure durations can be identified and mitigated.

Additionally, adhering to the standard allows for consistent measurement and reporting of laser beam parameters. This facilitates effective communication between laser manufacturers, users, and regulators. It also enables accurate comparison of different laser systems and performance evaluation over time.

The standard finds applications in various fields where lasers are used, including medical, industrial, and scientific research. In medicine, it helps ensure the safe and effective use of lasers in surgeries and diagnostics. In industry, it aids in laser cutting, welding, and material processing applications. In research, it assists in the characterization of laser beams for scientific experiments.

Conclusion

EN ISO 13146-12:2018 is an important standard within the EN ISO 13146 series, providing guidance on the measurement of beam widths and divergence angles of laser beams. By following this standard, stakeholders can ensure the safe operation of laser systems, facilitate accurate comparison and reporting of laser parameters, and enable a wide range of applications across various fields.