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測量刀是工具显微鏡和万能显微鏡上的主要测量附件,在要求精度較高的螺紋、圓錐度、直徑等的測量中,都要利用它来进行。它比一般影象法的測量,具有一定的优点。因为在一般影象法測量时,要按照外形輪廓調整光圈,又要考虑測量时压綫的精度等等,手續麻煩,精度不高。并且对有些要求在某一段上保証一定精度的測量,如图1,要求測量中間长度时,因显微鏡光学系統上的特性,用影象法不可能做到,如測量某些蝸輪滾刀軸向截面的齿形角等,影象法就无能为力,这一切都要用測
Measuring tool is the main measuring instrument on the microscope and universal microscope. It should be used in the measurement of high precision thread, conicity, diameter and so on. It has some advantages over the general imaging method. Because in the general image method of measurement, to adjust the aperture in accordance with the contour, but also to consider the accuracy of the pressure measurement line, etc., the procedure is troublesome, the accuracy is not high. And some require a certain accuracy in the measurement of a certain segment, as shown in Figure 1, the measurement of the intermediate length, due to the characteristics of the microscope optical system, with the image method can not be done, such as measuring some hob cutter Axial cross-section of the tooth-shaped angle, the image method is powerless, all this should be measured