ISO 16610-61-2015 pdf free.Geometrical product specification (GPS) – Filtration – Part 61: Linear areal filters – Gaussian filters.
This part of Iso 16610 specifies linear areal Gaussian filters for the rotationally symmetric filtration of nominal planar surfaces and the filtration of nominal cylindrical surfaces. It specifies, in particular, how to separate long and short wave components of a surface.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 16610-1, Geometrical product specification (GPS) — Filtration — Part 1: Overview and basic terminology
ISO 16610-20, Geometrical product specification (GPS) Filtration — Part 20: Linear profile filters:
basic concepts
ISO 16610-21:2011. Geometrical product specifications (GPS) — Filtration — Part 21: Linear profile filters:
Gaussian filters
ISO 16610-60, Geometrical product specification (GPS) — Filtration — Part 60: Linear areal filters:
Basic concepts
ISO/IEC Guide 99:2007, international vocabulary of metrology — Basic and general concepts and associated terms (VIM)
ISO/IEC Guide 98-3:2008, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16610-1, ISO 16610-20, ISO 16610-2 1, ISO 16610-60, lSO/IEC Guide 98-3:2008, ISO/IEC Guide 99, and the following apply.
3.1 linear areal filter areal filter which separates surfaces into long wave and short wave components and is also a linear function[SOLJRCE: 150 16610-60, 3.1]
3.1.1 linear planar filter linear area! filter (3d) that separate surfaces into long wave and short wave components, which applies to nominal planar surfaces
3.1.2 linear cylindrical filter linear areal filter (3.1) that separate surfaces into long wave and short wave components, which applies to nominal cylindrical surfaces[SOURCE: IS0 16610-60, 3.1.2]
3.2 cut-off wavelength (nesting index) wavelength of a sinusoidal surface of which 50% of the amplitude is transmitted by the linear areal flter(3.1)
Note 1 to entry: Linear areal filters are identified by the filter type and the cut-off wavelength.[SOURCE: IS0 16610-60, 3.7]
Note 2 to entry: The cut-off value for the Gaussian filter is an example of a nesting index.
3.3  undulations per revolution UPR number of sinusoidal undulations contained in the roundness profile undulation cut-off (nesting index) cut-off wavelength (3.2) of the filter applied to the extracted circumferential line
Note 1 to entry: These are usually defined in terms of undulations per revolution (UPR).
4 Characteristics of linear planar Gaussian filters
4.1 General
Linear planar Gaussian filters confirming to this part of ISO 16610 shall conform to 4.2 to 4.4.ISO 16610-61 pdf download.