Optics and optical instruments. Lasers and laser-related equipment. Lifetime of lasers Ingestion-build-78747 This document specifies the requirements

This document specifies the requirements for the construction and testing of flow restricting enclosures for non-electrical equipment intended for use in potentially explosive atmospheres if the atmosphere outside the enclosure becomes explosive rarely and for short durations only

for printed board connectors

concentric and eccentric reducers

the modelling of beam-to-column joints and structural joints connecting H or I sections

Manufacturers of pressure vessels

Optics and optical instruments. Lasers and laser-related equipment. Lifetime of lasers Ingestion-build-78747 This document specifies the requirements1 Scope This International Standard covers terms and definitions as well as test methods and evaluation procedures to characterize, estimate and predict the longterm behaviour of various types of lasers. This International Standard defines terms for the lifetime of lasers and specifies test procedures and fundamental aspects for the determination of lifetime. It applies for all types of lasers for which lifetime is a critical issue, including diode