导言下面将讨论关于透镜表面偏离球形误差的检验,是使试样和样品玻璃互相接触。虽然该方法由于使用简便而得名。但是缺陷却很多。这样相对其它干涉方法,其精度大为降低。例如由于反复不能肯定照明情况和观察状况;以及通过压力和由此出现的温度变化而产生的表面形变、表面氧化也必须估计到。此外,在通过成品的一般检验时,也就不存在表面是否是非球面的问题了。因为表面在检验时已经证实是旋转对称的。(定心干涉圈仍不能确保表面是球体)。另外,如果表面是这样的球面,即没有圈,而只能看到亮度差别,那么要得出对精确实验所需要的条 Introduction The following examines the test for deviation of the lens surface from spherical error by bringing the specimen and the sample glass into contact with each other. Although the method is named for its ease of use. But the flaws are many. This relative to other interference methods, the accuracy is greatly reduced. For example due to the repeated uncertainty of the lighting conditions and the observed conditions; and the surface deformation due to the pressure and the resulting temperature changes, the surface oxidation must also be estimated. In addition, there is no problem with whether the surface is aspherical or not, when passing the general inspection of the finished product. Because the surface at the time of testing has proved to be rotationally symmetric. (Centering interference circle still can not ensure that the surface is a sphere). In addition, if the surface is such a sphere, that is, there is no ring, but only to see the difference in brightness, then we need to draw the precise test required