ID | Pattern Name | Location | Description |
A | Concentric Circles | X = 2 Y = 10 | 1, 2, 3, 4, 5mm Circles with Cross Line and circle identifier. Line width 20µm |
B | Concentric Squares | X = 10 Y = 10 | 1, 2, 3, 4, 5mm Squares with Cross Line and circle identifier. Line width 20µm |
C | Line Grating 25 lines / mm | X = 18 Y = 10 | 25 line pairs per mm - (40µm line 40µm space) |
D | Line Grating 100 lines / mm | X = 26 Y = 10 | 50 line pairs per mm - (10µm line 10µm space) |
E | Half Protractor | X = 34 Y = 10 | 15° spacing - line width 20µm |
F | Grid Array Coarse | X = 40 Y = 10 | 5mm square array with 0.5mm divisions and central 2mm square with 0.25mm divisions - line width 20µm |
G | Grid Array Fine | X = 48 Y = 10 | 5mm square array with 0.1mm divisions and central 2mm square with 0.05mm divisions - line width 8µm |
H | Dot Array | X = 56 Y = 10 | Dot diameter 0.25mm Dot centre spacing 0.50mm - 11x11 grid = 121 dots |
I | Geometric progression of Opaque Dots | X = 2 Y = 4 | Line array of dot or square shapes. of either clear or opaque. Reducing in size Root 2 progression for the purposes edge threshold detection to enable a image analyser to measure the size correctly, or general shape size comparison. Root 2 progression of 21 dots or square shapes, from 3.5µm to 3.5mm Nominal size in mm |
J | Geometric progression of Opaque Squares | X = 17 Y = 4 | |
K | Geometric progression of Clear Dots | X = 32 Y = 4 | |
L | Geometric progression of Clear Squares | X = 47 Y = 4 | |
M | Vertical Scale Fine Variable | X = 63 Y = 2 | Overall Scale length 10mm. 5mm in 0.5mm divisions - line width 20µm 4mm in 0.1mm divisions - line width 10µm 1mm in 0.01mm divisions - line width 3µm |
N | Horizontal Scale Coarse | X = 0 Y = 0 | Scale length 62mm long 2mm divisions, sub divided in 1mm divisions with a 20µm line width. |