| 平行式向列液晶实现相移剪切电子散斑干涉术的研究 |
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| 引用本文： | 姜力军 刘伟. 平行式向列液晶实现相移剪切电子散斑干涉术的研究[J]. 光学学报, 1996, 16(2): 44-247 |
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| 作者姓名： | 姜力军 刘伟 |
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| 作者单位： | 西安交通大学机械工程学院激光红外研究所 |
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| 摘 要： | 研究了向列型液晶的相位调制特性，采用平行式向列液昌作为相移器建立了相移剪切电子散斑干涉计量系统。该方法将相移技术引入到剪切电子散斑干涉术中，提高了检测精度，采用了相关条纹法求解相位，简化了计算；相移方法简单，可靠。用该系统进行应变场的测量实验，取得了满意的效果。
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| 关 键 词： | 向列型 液晶 散斑干涉术 相移 应变测量 |
| 收稿时间： | 1994-12-25 |
A Study on PALC Phase Shifting Shearing ESPI |
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| Jang Lijun Liu Wei Tan Yushan. A Study on PALC Phase Shifting Shearing ESPI[J]. Acta Optica Sinica, 1996, 16(2): 44-247 |
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| Authors: | Jang Lijun Liu Wei Tan Yushan |
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| Abstract: | Characteristics of phase modulation of a nematic liquid crystal is studied. A new phase shifting shearing ESPI system which uses parallel aligned liquid crystal as a phase modulator is deceloped. This method lincreases the mearsuring accuracy of shearing ESPI by combining phase shifting technology with shearing ESPI. The phase modulation is simple. The correlation fringe method is used for phase calculation. Satisfactory results are acquired in the experiments on deformation measurement. |
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| Keywords: | nematic liquid crystal shearing electronic speckle pattern interferometry phase shifting. |
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