Development of a three-degree-of-freedom laser linear encoder for error measurement of a high precision stage

Hsueh Liang Huang; Chien Hung Liu; Wen Yuh Jywe; Ming Shi Wang; Te Hua Fang

doi:10.1063/1.2743165

Development of a three-degree-of-freedom laser linear encoder for error measurement of a high precision stage

Hsueh Liang Huang, Chien Hung Liu, Wen Yuh Jywe, Ming Shi Wang, Te Hua Fang

Department of Engineering Science

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

In this study, a laser linear encoder with three degrees of freedom (3-DOFs) based on diffraction and interference was developed to measure the linear displacement and two angular errors of a linear moving stage. Parts of the linear motion errors induced from the two angular errors can be calculated by this prototype 3-DOF laser encoder. It was an effective method for online error calculation and compensation to improve precision stage performance. This new function was superior to other laser encoders. The verification results showed that the resolution is 20 nm. It detected displacements relative to an external grating scale with accuracy of about ±150 nm for a measuring range of ±1 mm, and detected the angular errors with related accuracy of about ±1 arc sec for a measuring range of ±100 arc sec.

Original language	English
Article number	066103
Journal	Review of Scientific Instruments
Volume	78
Issue number	6
DOIs	https://doi.org/10.1063/1.2743165
Publication status	Published - 2007 Aug 2

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.2743165

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abstract = "In this study, a laser linear encoder with three degrees of freedom (3-DOFs) based on diffraction and interference was developed to measure the linear displacement and two angular errors of a linear moving stage. Parts of the linear motion errors induced from the two angular errors can be calculated by this prototype 3-DOF laser encoder. It was an effective method for online error calculation and compensation to improve precision stage performance. This new function was superior to other laser encoders. The verification results showed that the resolution is 20 nm. It detected displacements relative to an external grating scale with accuracy of about ±150 nm for a measuring range of ±1 mm, and detected the angular errors with related accuracy of about ±1 arc sec for a measuring range of ±100 arc sec.",

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AU - Huang, Hsueh Liang

AU - Liu, Chien Hung

AU - Jywe, Wen Yuh

AU - Wang, Ming Shi

AU - Fang, Te Hua

PY - 2007/8/2

Y1 - 2007/8/2

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AB - In this study, a laser linear encoder with three degrees of freedom (3-DOFs) based on diffraction and interference was developed to measure the linear displacement and two angular errors of a linear moving stage. Parts of the linear motion errors induced from the two angular errors can be calculated by this prototype 3-DOF laser encoder. It was an effective method for online error calculation and compensation to improve precision stage performance. This new function was superior to other laser encoders. The verification results showed that the resolution is 20 nm. It detected displacements relative to an external grating scale with accuracy of about ±150 nm for a measuring range of ±1 mm, and detected the angular errors with related accuracy of about ±1 arc sec for a measuring range of ±100 arc sec.

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Development of a three-degree-of-freedom laser linear encoder for error measurement of a high precision stage

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