Laser & Optoelectronics Progress, Volume. 47, Issue 6, 60902(2010)
Holographic Displacement Measurement Based on CCD and EALCD
A new method of holography combining CCD and electrically addressed liquid crystal display (EALCD) is presented. CCD is used to record and reconstruct hologram,and EALCD is used to reconstruct the digital hologram in stead of holographic plate after exposure of traditional optical holography. This method avoids the developing,fixing processes of traditional hologram recording material,averts the shortcoming about nonlinear recording of holographic material,and can realize the displacement measurement based on phase shift method with which general digital hologram is unable to achieve. In order to certify the practicality of this method,double-exposure digital holographic interferometry has been used in experiment,and Fresnel hologram of reflective measured objects is obtained. The optical reconstruction is proceeded,and accurate experimental data has been gained. Experimental results indicate that the combination of the CCD and EALCD can realize the optical reconstruction of digital hologram,and the displacement of object can be accurately calculated through the interference fringes.
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Fan Zhenjie, Ning Chengda, Pang Haojun, Wang Wensheng. Holographic Displacement Measurement Based on CCD and EALCD[J]. Laser & Optoelectronics Progress, 2010, 47(6): 60902
Category: Holography
Received: May. 25, 2009
Accepted: --
Published Online: May. 17, 2010
The Author Email: Zhenjie Fan (fanzhenjie1984@163.com)