1 General
    1.1 Scope and object
    1.2 General description
2 Apparatus
    2.1 Method 1 Two-dimensional surface analysis
    2.2 Method 2 Three-dimensional surface analysis
                     by interferometry system
    2.3 Method 3 Two-dimensional surface analysis
                     by interferometry system
3 Procedure
    3.1 Measurement regions
    3.2 Method 1 Two-dimensional surface analysis
    3.3 Method 2 Three-dimensional surface analysis
                     by interferometry system
    3.4 Method 3 Two-dimensional surface analysis by
                     interferometry system
4 Details to be specified
    4.1 Method 1 Two-dimensional surface analysis
    4.2 Method 2 Three-dimensional interferometry
                     analysis
    4.3 Method 3 Two-dimensional surface analysis by
                     interferometry system
Figures
1 Fibre undercut and protrusion of spherically polished
    ferrule endface
2 Apparatus for two-dimensional surface analysis
3 Apparatus for three-dimensional surface analysis by
    interferometry system
4 Apparatus for two-dimensional surface analysis by
    interferometry system
5 Ferrule endface and measurement regions
6 Converted ferrule endface profile
7 Types of converted ferrule endface profile
8 Ferrule endface surface
9 Fitting region and averaging region of the ferrule
    endface surface
10 Converted endface surface of the global ferrule
    (see figure 8)
11 Converted ferrule endface surface subtracting the
    extracting region (see figure 9)
12 Interferometry image from the microscope and the
    acquired intensity light curve relevant to the
    selected row with the fitting theoretical function
A.1 Acquired ferrule profile and rectified profile
Annex A (informative) Undercut or protrusion evaluation