OPTICAL PROFILOMETRY AND ITS APPLICATION TO MECHANICALLY INACCESSIBLE SURFACES .1. PRINCIPLES OF FOCUS ERROR-DETECTION

被引:24
作者
VISSCHER, M [1 ]
STRUIK, KG [1 ]
机构
[1] EINDHOVEN UNIV TECHNOL,DEPT MECH ENGN,5600 MB EINDHOVEN,NETHERLANDS
来源
PRECISION ENGINEERING-JOURNAL OF THE AMERICAN SOCIETY FOR PRECISION ENGINEERING | 1994年 / 16卷 / 03期
关键词
OPTICAL PROFILOMETRY; SURFACE ROUGHNESS MEASUREMENT; FOCUS ERROR DETECTION; DEFECT OF FOCUS SYSTEM;
D O I
10.1016/0141-6359(94)90124-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Optical profilometers can in principle be used to measure the roughness of surfaces that are not accessible for mechanical profilometers. Optical measurements can be performed through a transparent layer because of the noncontacting nature of the measuring principle. In this article the properties of a focus error detection system are given for the general case of scanning free surfaces and for the particular case of a glass plate lying on the scanned surface. Tests show that scanning through a glass plate is possible, but there are some limitations. The conditions under which proper measurements can be performed are described. Some examples of scanning through a transparent layer will be presented in part II of this paper.
引用
收藏
页码:192 / 198
页数:7
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