【作者】 张秀达； 严惠民；

【Author】 ZHANG Xiu-da, YAN Hui-min (NERC for Optical Instrument, Zhejiang University, Hangzhou 310027, China)

【机构】 浙江大学国家光学仪器工程技术研究中心；

【摘要】 提出了一种区域化照明对细小目标的成像探测方法。理论上分析了区域化照明下细小目标信噪比相对相同总功率条件下均匀照明的提高倍数。给出了最优的区域化照明结构和区域化照明可以提高细小目标信噪比的条件。利用部分反射平面镜和全反平面镜实现了正方形网格状的区域化照明,给出了该方法实现区域化照明的理论计算。用CCD探测器获取了均匀照明和线状照明条件下的线状目标图像。初步实验的分析结果表明实验结果和理论计算符合,区域化照明可以提高细小目标的信噪比。更多还原

【Abstract】 An imaging detection method based on segment illumination for filamentous objects detection is proposed. The multiple of SNR (Signal to Noise Ratio) for filamentous objects between area segment illumination and uniformity illumination is analyzed. The best area segment function is given. Part reflector and full reflector are imposed to compose an area segment illumination system, and the theory of this system is also given. A CCD (Charge Couple Device) is used to obtain images of filamentous objects in the condition of area segment illumination and uniformity illumination. The analysis results of these images show that area segment illumination can increase detection SNR comparing with uniformity illumination.更多还原