| 摘要 |
The present invention relates to a measurement element (10) for incremental encoders, wherein the measurement element (10) has an incremental track (20) with scattering regions (23) and reflective regions (24) alternately arranged in the longitudinal direction (x). Each scattering region (23) comprises at least two linear recesses (26-1, 26-2, 26-3, 26-4, 26-5), which extend substantially perpendicular to the longitudinal direction (x) of the incremental track and are arranged consecutively in a series in the longitudinal direction (x) of the incremental track (20) and are additionally formed to diffusely reflect incident light. The reflective regions (24) of the incremental track (20) have in contrast a substantially smooth surface, which is additionally formed to specularly reflect incident light. In addition, the incremental track (20) further comprises a pitch (P), which results from the addition of the width (B23) of one of the scattering regions (23) and the width (B24) of one of the reflective regions (24). In order to optimize the contrast of the radiation scattered by the measurement element, the scattering regions (23) comprise, in the longitudinal direction (x) of the incremental track (20), a width (B23), which is smaller than half the pitch (P), wherein each respective pair of the linear recesses (26-1, 26-2, 26-3, 26-4, 26-5) of a scattering region (23) are arranged on opposing outer sides (As1, As2) of the scattering region (23) and delimit the width (B23) of the one scattering region (23) in the longitudinal direction (x) of the incremental track (20). |
