Multi-degree-of-freedom displacement measurement system for milli-structures

A new multi-degree-of-freedom measurement system for milli-structures is presented. This methodology is based on optical beam deflection method and triangulation. It employs a diffraction grating as a reflective object, which reflects an incident laser beam into several directions. To obtain the pose information of a measured object, the detecting positions of zeroth- and first-order diffracted rays are measured using three two-dimensional detectors. From these values, we can calculate six-degree-of-freedom displacement through a kinematic analysis. The performance was evaluated with resolution, measurement errors and crosstalk. The results show that measurement errors and maximum crosstalk are within +/-0.5 mum in translation and +/-2 " in rotation. As an application, we measured the multi-DOF motion of a bimorph type PZT actuator and obtained its frequency response function.
Publisher
IOP PUBLISHING LTD
Issue Date
2001-09
Language
ENG
Keywords

DISK-DRIVE

Citation

MEASUREMENT SCIENCE TECHNOLOGY, v.12, no.9, pp.1495 - 1502

ISSN
0957-0233
DOI
10.1088/0957-0233/12/9/316
URI
http://hdl.handle.net/10203/2511
Appears in Collection
ME-Journal Papers(저널논문)
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