Overview
EN ISO 15367-2:2005 - "Lasers and laser-related equipment - Test methods for determination of the shape of a laser beam wavefront - Part 2: Shack‑Hartmann sensors" (CEN adoption of ISO 15367-2:2005) specifies standardized methods for measuring and evaluating the wavefront distribution of a laser beam using Hartmann and Shack‑Hartmann sensors. The standard applies to fully coherent, partially coherent and astigmatic beams, for both pulsed and continuous operation, and describes reliable numerical reconstruction methods and uncertainty analysis needed to derive wavefront parameters defined in ISO 15367‑1.
Key topics
- Measurement principle: Operation and test principle for Hartmann and Shack‑Hartmann wavefront sensors, including detector system considerations and sub‑aperture geometry.
- Measurement arrangement & procedure: Recommended setups, detector calibration, background subtraction and practical measurement steps for reproducible results.
- Wavefront gradient evaluation: Methods to evaluate local slopes from lenslet or pinhole arrays (centroiding and gradient extraction).
- Wavefront reconstruction: Both zonal (direct numerical integration) and modal reconstruction methods are specified, with guidance on implementation and limitations.
- Wavefront representation: Use of modal bases (e.g., Zernike polynomials) and notation for representing aberrations and phase maps.
- Uncertainty & performance: Treatment of statistical errors, environmental influences, alignment errors, repeatability and measurement accuracy for robust uncertainty budgets.
- Reporting: Required content for a complete test report to ensure traceability and comparability.
Applications
EN ISO 15367-2:2005 is practical for:
- Optical and laser system designers needing quantitative beam propagation and resonator optimization.
- Adaptive optics and beam‑shaping teams performing real‑time wavefront monitoring and correction.
- Metrology labs and manufacturers performing acceptance testing, at‑wavelength optics characterization and Zernike‑based aberration analysis.
- Process engineers monitoring thermal lensing, beam focusability, and on‑line diagnostics in industrial laser systems.
- Researchers characterizing coherent and partially coherent beams where standardized, traceable wavefront data are required.
Who should use this standard
- Optical engineers, laser manufacturers, metrology laboratories, quality assurance personnel, and academic researchers working with wavefront sensors and laser beam characterization.
Related standards
- ISO 15367‑1:2003 - Terminology and fundamental aspects (wavefront parameters)
- ISO 11145 - Vocabulary and symbols for lasers
- ISO 13694 - Laser beam power (energy) density distribution
- ISO 11146 (parts 1 & 2) - Beam widths, divergence and beam propagation ratios
This standard ensures consistent, reproducible Shack‑Hartmann wavefront measurement, enabling reliable wavefront reconstruction, uncertainty assessment, and interoperable reporting for laser beam characterization.
