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前言分步重复精缩照相机在近二十年左右的发展过程中,虽然主体结构没有太大差异,但是由于激光干涉测量法和莫尔条纹测量法的采用,而淘汰了靠丝杠精度来实现的定位方式。加之驱动系统和电控功能的完善,使其定位精度从几个微米,一跃进入零点几个微米。在激光干涉测置法和莫尔条纹测量法,进入相互媲美的阶段,很难全面地评价那一种优越,不过在使用环境适应性方面,条莫尔纹测量法的占先,确是显而易见的,至少国内情况是这样。
Preface The step-by-step retouching camera in the course of nearly 20 years of development, although the main structure is not much difference, but due to the laser interferometry and Moiré fringe measurement method, and eliminated by the screw precision to achieve Positioning method. Coupled with the improvement of the drive system and electronic control functions, positioning accuracy from a few microns, jumped into the zero a few microns. In laser interferometry and Moiré fringe measurements, it is difficult to evaluate that superiority comprehensively in stages comparable to each other, but the preemptive determination of moiré measurements is clearly evident in terms of environmental suitability At least in the domestic situation is like this.