DIN ISO 9211-3:2025-07

This document, DIN ISO 9211-3, is part of a series of standards that specifies the surface treatment of components and substrates excluding ophthalmic optics (spectacles) by the application of optical coatings. It defines the general characteristics and the test and measurement methods whenever necessary, but it is not intended to define the process method. The ISO 9211 series of standards describes the surface treatment of components and substrates excluding ophthalmic optics (spectacles) by the application of optical coatings and prescribes a standardized format for their specification. It defines the general characteristics and the test and measurement methods whenever necessary, but it is not intended to define the process method. This document specifies general use and standard categories of use for optical coatings and identifies which environmental tests are necessary to prove that the coatings meet the required specification. The responsible national standardization committee is Working Group NA 027-01-03 AA "Dünne Schichten für die Optik" ("Optical coatings") at DIN Standards Committee Optics and Precision Mechanics (NAFuO).