scope:

This standard specifies filter functions of uncoated volume filters for optical applications excluding ophthalmic optics (spectacles) and gives a standard form for their specification. Additionally, basic definitions and a description of the specification concerning optical volume filters are given. The standard specifies the optical properties of the filters and the test and measurement methods whenever necessary.

This standard does not specify any material properties (inner quality, homogeneity, etc.) and it does not apply to any production method. This document applies to the raw material (filter glass, filter plastics, etc.) and the polished component as well.

NOTE 1 Colorimetric parameters for the description of the filter function are specified in e. g. DIN ISO 11664 series.

NOTE 2 For coated filters see DIN ISO 9211 series.