Effective thermal expansion coefficient measurement of holographic material using total internal reflection heterodyne interferometry

Ching-Tang Meng; Chih-Ching Cheng; Cheng-Chih Hsu; Chyan-Chyi Wu

doi:10.1117/1.OE.54.9.094105

22 September 2015 Effective thermal expansion coefficient measurement of holographic material using total internal reflection heterodyne interferometry

Ching-Tang Meng, Chih-Ching Cheng, Cheng-Chih Hsu, Chyan-Chyi Wu

Author Affiliations +

Optical Engineering, Vol. 54, Issue 9, 094105 (September 2015). https://doi.org/10.1117/1.OE.54.9.094105

Abstract

The thermal optical properties of a holographic material were measured using total internal reflection heterodyne interferometry. The effective thermal expansion coefficients (ETECs) of the holographic material were determined at various exposure times. Our results showed that the holographic material exhibited a smaller thermal expansion coefficient (TEC) with a longer exposure time than those materials with short exposure times. Thus the diffraction power increased as the exposure time of the holographic material increased. Furthermore, the proposed method provides a highly accurate means of measurement for determination of the TEC. The theoretical ETEC error of the proposed method is better than 1.1×10⁻⁷ and the practical ETEC error under the precision measurement conditions can reach to 2.3×10−⁶.

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Ching-Tang Meng, Chih-Ching Cheng, Cheng-Chih Hsu, and Chyan-Chyi Wu "Effective thermal expansion coefficient measurement of holographic material using total internal reflection heterodyne interferometry," Optical Engineering 54(9), 094105 (22 September 2015). https://doi.org/10.1117/1.OE.54.9.094105

Published: 22 September 2015

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