| 材料表面形变应变场的光电检测新途径 |
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| 引用本文： | 杨永正,杨军.材料表面形变应变场的光电检测新途径[J].光电工程,1997,24(3):33-36. |
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| 作者姓名： | 杨永正 杨军 |
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| 作者单位： | 西北工业大学应用物理系(杨永正)，西安达力仪表研究所(杨军) |
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| 基金项目： | 国家自然科学基金,航空科学基金 |
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| 摘 要： | 目前为了精度地测量材料表面形变，应变场，正致力于完善在试件表面刻蚀１，０００－１０，０００线／的正交网络技术，这是件难度很大的具有一定限度的新技术，光刻线比线距宽时，由于使用效果不佳而失去意义。
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| 关 键 词： | 变形测量 应变测量 材料缺陷 表面缺陷 光电测量 |
The Research of Modifying the Laser Beam Transverse Mode with Computer Generated Hologram |
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| Shi Jianchuan,Li Shen,Liu Shenggang.The Research of Modifying the Laser Beam Transverse Mode with Computer Generated Hologram[J].Opto-Electronic Engineering,1997,24(3):33-36. |
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| Authors: | Shi Jianchuan Li Shen Liu Shenggang |
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| Abstract: | Taking circular symmetric Gaussian beam changing into cross beam as an example,the designing theory and method of Hologram Optics Element(HOE) are put forward in the paper.The diffraction equation of Computer Generated Holograms(CGH) is deduced.The method of imitating the designing result with computer is given.The problems of beam energy converting efficieny and the energy redistribution can be solved by use of HOE.The advantages of nimbleness and convenience are fully used by the method.The blindness in designing is utmostly reduced and the designing efficiency has been raised. |
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| Keywords: | Holographic optical elements Computer generated holograms Transverse modes light diffraction Phase gratings |
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