Table 1 Parameters of the scratches
From: Laser induced damage due to scratches in the surface of nonlinear optical crystals KH2PO4 (KDP)
| Â | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 | S9 |
|---|---|---|---|---|---|---|---|---|---|
Force(mN) | 50 | 60 | 70 | 50 | 50 | 50 | 50 | 50 | 50 |
Shape | ellipse | ellipse | ellipse | triangle | triangle | ellipse | ellipse | triangle | ellipse |
Direction | 0° | 0° | 0° | 90° | 60° | 30° | 0° | 0° | 0° |
Width(μm) | 10 | 11 | 12 | 8 | 9 | 10 | 10 | 8 | 10 |
Depth(nm) | 300 | 400 | 500 | 300 | 300 | 300 | 300 | 900 | 300 |
Indenter | spherical | spherical | spherical | spherical | spherical | spherical | spherical | Vickers | spherical |
W-D ratio | 33.3 | 27.5 | 24 | 26.7 | 30 | 33.3 | 33.3 | 8.9 | 33.3 |