Overview
EN ISO 15367-1:2003 - "Lasers and laser-related equipment - Test methods for determination of the shape of a laser beam wavefront - Part 1: Terminology and fundamental aspects" (CEN/ISO) defines the terminology, measurement fundamentals and reporting requirements for characterizing the wavefront shape of laser beams. The standard specifies how to measure and interpret the spatial phase distribution across a plane approximately perpendicular to beam propagation and requires that quantitative wavefront parameters and their uncertainty be documented in a test report. Methods apply to a wide range of beam types from both continuous-wave and pulsed lasers.
Key topics and requirements
- Terminology and symbols for phase, wavefront surface, and related parameters to ensure consistent reporting.
- Phase distribution measurement: guidance on capturing the spatial distribution of the phase (topography) of a beam’s wavefront.
- Wavefront parameters defined and specified for extraction, including:
- azimuth of principal planes of the phase distribution
- magnitude of astigmatic aberrations and detailed astigmatism definitions
- evaluation of the wavefront aberration function and RMS wavefront deformation
- Measurement process elements detailed in the standard: test environment, beam modification, detector systems, wavefront measuring instruments, alignment and calibration procedures, and automated data inspection.
- Analysis methods: polynomial representation of wavefronts and computation of wavefront quality metrics.
- Uncertainty: requirements for uncertainty estimation and identification of main uncertainty sources that must be addressed in the test report.
- Reporting: quantitative results plus uncertainty must be provided in a test report suitable for quality assurance and traceable assessment.
Practical applications and users
EN ISO 15367-1:2003 is used for laser beam characterization, quality control and system development. Typical applications include:
- Specifying and verifying beam quality for optical system design and component selection.
- Measuring and correcting astigmatism and other wavefront deformations during alignment and integration.
- Combining phase distribution data with power (energy) density measurements (ISO 13694) for process engineering, safety hazard analysis and damage assessment at the interaction point.
- Producing traceable test reports for R&D labs, manufacturers, metrology institutes, medical and industrial laser system integrators, and safety assessors.
Related standards
- ISO 15367-2 - Hartmann–Shack sensors (measurement technique)
- ISO 13694 - Laser beam power (energy) density distribution
- ISO 11146 - Beam widths, divergence and beam propagation factor
- IEC 60825 - Laser product safety
These complementary standards support combined characterization of beam intensity, propagation and safety.