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在机械制造业中,常有一系列孔的中心组成的直线,称之为“空间直线”。多用内调焦式测微望远镜对其进行检测。但是对于远、近测试点不能有相同的成象质量和测量精度。本文试图解决这种“空间直线度”测量中对远、近测试点具有相近的测量精度和成象质量问题,即对远测试点和近测试点具有相同的倍率、孔径角,同时有相同的理论分辨率和象面照度,消除调焦误差,具有合格的成象质量。文中以一个无焦系统作为物镜,构成“等精度测量系统”,并研制成功仪器作为例子,说明无焦系统的应用。
In the machinery manufacturing industry, there is often a series of straight lines formed by the centers of holes called “spatial lines.” Use multi-focus telescope to detect it. However, far and near test points can not have the same imaging quality and measurement accuracy. This paper attempts to solve this kind of “spatial straightness” measurement of far and near the test points have similar measurement accuracy and imaging quality problems, that is, for the remote test point and near the test point has the same magnification, aperture angle, at the same time have the same Theoretical resolution and image plane illumination, eliminating focus error, with acceptable image quality. In this paper, a non-coke system as an objective lens to form a “precision measurement system” and the development of successful instruments as an example to illustrate the application of non-coke system.