High -speed sharp range unit

The utility model relates to a high -speed sharp range unit for the measurement absolute displacement of object in high -speed motion that await measuring, include a scale, remove read head, signal production / treatment circuit, drive signal adapter and be fixed in reflecting plate on the object awaits measuring, the scale orientation be provided with a plurality of align to grid and launch the electrode strip that surface profile is the same in the one side of removal read head, the scale dorsad be equipped with multichannel carrier signal transmission line in the one side of removal read head, it includes a laser ranging module and reads the module to remove the read head, it includes first electrode read head and second electrode read head to read the module. Above -mentioned high -speed sharp range unit combines present incremental encoder technique with the phase type laser distance -measurement technique, measure the object that awaits measuring in the high speed motion, can obtain more high -resolutio