| 研测动态问题的旋转孔径散斑照相法Ⅱ:矩位、平四位、直三位孔径 |
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| 引用本文： | 顾杰,沈永昭,杨臣诚,周步新.研测动态问题的旋转孔径散斑照相法Ⅱ:矩位、平四位、直三位孔径[J].光学学报,1987(5). |
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| 作者姓名： | 顾杰 沈永昭 杨臣诚 周步新 |
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| 作者单位： | 苏州大学物理系
(顾杰，沈永昭，杨臣诚)，苏州市第十八中学(周步新) |
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| 摘 要： | 本文提出了旋转孔径散斑照相法中三种新颖的基本孔径:矩位孔、平四位孔和直三位孔,进行了理论分析和实验证明。采用新孔径拍摄散斑照相,散斑信息利用率高,衍射晕能量分布合理,信噪比提高,因而散斑条纹清晰度得到改善,相应的实验误差减小。
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| 关 键 词： | 散斑照相 旋转孔径 衍射晕 基本孔径 菱位孔 矩位孔 平四位孔 直三位孔 |
Rotating aperture method of speckle photography for dynamic problems II: Rectangle, parallelogram- and right-triangle-located-apertures |
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| GU JIE,SHEN YONGZHAO,YANG CHENGCHEN.Rotating aperture method of speckle photography for dynamic problems II: Rectangle, parallelogram- and right-triangle-located-apertures[J].Acta Optica Sinica,1987(5). |
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| Authors: | GU JIE SHEN YONGZHAO YANG CHENGCHEN |
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| Abstract: | In this paper, we propose three new basic apertures in rotating aperture method: rectangle-located-aperture and parallelogram-located-aperture and right-triangle-located-aperture. Theoretical analysis and experimental demonstration are presented. By using these new apertures, the utilization ratio of information of a specklegrain is increased, the intensity distribution of diffraction halo becomes more reasonable and the N/S ratio is enhanced, so the speckle fringes are clearer and the experimental errors are less. |
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| Keywords: | speckle photography rotating aperture diffraction halo basic aperture rhom-located-aperture reetangle-located-aperture parallelogram-located-aperture right-triangle-located-aperture |
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