TS EN ISO 11145

TS EN ISO 11145 is a vocabulary and symbols standard that establishes a common technical language for laser technology and related equipment. It gathers the basic terms, units of measurement and symbols used to define beam parameters and laser product properties clearly, helping the same expressions carry the same meaning across laboratories, manufacturers and application areas. In practice, it serves as a foundational reference for consistent description of laser systems and their measurable characteristics.

Why laser terminology needs its own framework

From a general technical perspective, lasers produce highly directional light that can be controlled and characterised with much greater precision than ordinary light sources. Parameters such as power, energy, wavelength, beam diameter, divergence and pulse duration therefore need carefully defined terminology. Vocabulary standards help prevent ambiguity, which is especially important when comparing performance, interpreting measurement results or reading technical product information.

Technical focus of this document

• Basic terms used in the field of laser technology
• Symbols used to describe lasers and laser-related equipment
• Common expression of units of measurement
• Clear definitions for beam parameters and laser product properties
• A shared terminology framework that supports reproducible interpretation of tests and measurements

This record is the TSE edition based on ISO 11145 and it is marked as withdrawn. It should be understood as a vocabulary-and-symbols standard rather than a test method document: it does not describe how to design a specific device, but provides the common language used to name and interpret laser-related concepts. That makes it particularly useful for engineers, measurement specialists and technical authors working with laser equipment.