【作者】 伍江涛； 江竹青； 宋蕾； 王羽佳； 贾烨； 陶世荃；

【Author】 Jiangtao Wu,1,2,Zhuqing Jiang1,2,Lei Song1,2,Yujia Wang1,2,Ye Jia1,2,Shiquan Tao1,2(1 College of Applied Sciences,Beijing Universityof Technology,Beijing 100124,China)(2Institute of Information Photonics Technology,Beijing Universityof Technology,Beijing 100124,China)

【机构】 北京工业大学应用数理学院； 北京工业大学微纳信息光子技术研究所；

【摘要】 本文研究基于不同光源照射的体全息光栅成像系统的成像特性。采用波长532nm的相干光,在2mm厚的掺铁铜铌酸锂晶体中记录体全息光栅,作为成像系统中的体全息透镜。研究比较该成像系统在波长为532nm和640nm的相干光照射下的衍射读出的成像特性,结果表明,不同波长光照射成像时,体全息成像系统深度分辨率不同,红光读出时具有更灵敏的轴向选择性。实验研究对比了单色光源与宽频光源成像特性,结果表明,当采用宽频光源读出时将得到更多的关于成像物体的横向信息。更多还原

【Abstract】 In this paper the imaging properties of volume holographic gratings with different illumination sources are investigated.In the experiments,a volume hologram is recorded by two recording beams interfering at the wavelength of 532 nm.The grating recorded at wavelength of 532 nm can be Bragg matched at another wavelength of 640 nm by using a different reconstruction angle.The volume holographic imaging with a white light is also conducted in the experiment.The result shows that more lateral information about the object can be obtained according to the Bragg degeneracy.The depth resolution of the volume holographic imaging system at different illumination sources are obtained experimentally,which is in accordance with the theoretical value.更多还原