The 77738 Motor Driven Curved Slit Assembly is used with the MS257 and has 20 mm high slits which are slightly curved to compensate for the inherent bending of the entrance slit image. Slit widths range from 4 μm to 2.0 mm, as with the 77722 Assembly (repeatability and accuracy are also the same as the 77722). The 77738 gives better throughput and better resolution, despite the larger, 20 mm height. Factory recalibration service is recommended when transitioning to a motorized slit assembly.


77738电机驱动的弯曲狭缝组件与MS257一起使用，并且有20毫米高的狭缝，这些狭缝是轻微弯曲的，以补偿入口狭缝图像固有的弯曲。狭缝宽度范围从4μm 2.0毫米,与77722年的大会(重复性和准确性也一样的77722)。77738提供了更好的吞吐量和更好的分辨率，尽管更大，20毫米的高度。在过渡到电动狭缝总成时，建议使用工厂重新校准服务。