BS ENISO 11146-2. Lasers and laser-related equipment. Test methods for laser beam widths, divergence angles and beam propagation ratios Part 2. General astigmatic beams
|Standard number:||20/30390868 DC|
|Status:||Draft for Comment|
- 31.260 Optoelectronics. Laser equipment
This document specifies methods for measuring beam widths (diameter), divergence angles and beam propagation ratios of laser beams. This document is applicable to general astigmatic beams or unknown types of beams. For stigmatic and simple astigmatic beams, ISO 11146-1 is applicable.
Within this document, the description of laser beams is accomplished by means of the second order moments of the Wigner distribution rather than physical quantities such as beam widths and divergence angles. However these physical quantities are closely related to the second order moments of the Wigner distribution. In ISO/TR 11146-3, formulae are given to calculate all relevant physical quantities from the measured second order moments.