分波段照明法实现单透镜大景深成像

发布时间：2018-04-12 21:33

  本文选题：机器视觉 + 单透镜成像　； 参考：《光子学报》2017年08期

【摘要】：基于透镜色散原理,提出了运用分波段照明法扩大单透镜成像景深的方法.理论推导出物距和照明光波长之间存在正相关关系,据此选择相应波段的照明光源,通过照明光学设计,使不同物距的物体均能清晰成像在同一像面上.ZEMAX软件模拟结果与理论分析吻合.采用自行设计的图像采集系统,只用一个35mm焦距普通双凸透镜进行实验测试.人眼主观和专业软件测试结果均表明:采用分波段照明方式比用白光照明景深扩大81.8%,分辨率最大提升200.3%;比只用单色光照明景深扩大了93.6%,分辨率最大提升189.7%.
[Abstract]:Based on the principle of lens dispersion, a method of enlarging the depth of field of a single lens by using the split-band illumination method is proposed.It is deduced theoretically that there is a positive correlation between object distance and illumination wavelength. According to this, the illumination light source in the corresponding band is selected, and the illumination optical design is carried out.All objects with different distances can be clearly imaged on the same image plane. The simulation results of the software ZEMAX are in good agreement with the theoretical analysis.A self-designed image acquisition system is used, and only one 35mm normal double convex lens is used for experimental test.The results of subjective and professional software test of human eyes show that the depth of field with sub-band illumination is 81.8% larger than that with white light, and the resolution is 200.3.The field depth of monochromatic illumination is 93.66.The maximum resolution is 189.7%.
【作者单位】： 江南大学理学院江苏省轻工光电工程技术研究中心;
【基金】：国家自然科学基金(No.11647144) 江苏省自然科学基金(No.BK20130162) 江苏省普通高校研究生科研创新计划(No.SJZZ16_0215)资助~~
【分类号】：TP391.41
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本文编号：1741517