Table 1.
The details of surfaces used in the roughness judgment task.
| Ridge Width | Groove Width | ||||||
|---|---|---|---|---|---|---|---|
| Standard Stimulus (μm) | Comparison Stimulus (μm) | ||||||
| Least Coarse | Most Coarse | ||||||
| Fine Surfaces | 100 | 220 | 320 | 360 | 400 | 440 | 480 |
| Coarse Surfaces | 400 | 1120 | 1200 | 1280 | 1360 | 1440 | 1520 |
Ridge and groove widths of the square wave surfaces are shown in microns for a high spatial frequency group (Fine Surfaces) and a lower frequency group (Coarse Surfaces). Microscopic inspection revealed GW’s to be within 6% of target values.