基于液晶空间光调制器的消色差透镜  

Achromatic Lens Based on Liquid Crystal Spatial Light Modulator

作　　者：许忠保[1] 陶伟森 王双迎 陈威 宋丛珊 金万慧 辜凌鹰 吴钦 刘凤鸣 XU Zhong-bao1 , TAO Wei-sen1 , WANG Shuang-ying1 , CHEN Wei1 , SONG Cong-shan2 , JIN Wan-hui2 , GU Ling-ying2 , WU Qin2 , LIU Feng-ming2(1 School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China ;2 Hubei Province Fibre Inspection Bureau, Wuhan 430060, Chin)

机构地区：[1]湖北工业大学机械工程学院,武汉430068 [2]湖北省纤维检验局,武汉430060

出　　处：《光子学报》2018年第4期1-7,共7页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61077086)资助~~

摘　　要：依据标量衍射理论,在分析消除轴向及倍率色差条件的基础上,利用纯相位液晶空间光调制器的可编程控制特性,将红、绿、蓝三种色光调制的菲涅耳透镜与闪耀光栅镶嵌在一起,通过随机等概率的复用方法,在液晶空间光调制器上编程,实现了具有共同焦距的三色光复用透镜,消除了轴向色差.同时,通过对红、绿、蓝三色光调制的菲涅耳透镜孔径的约束,实现了三色光在焦平面处相同的聚焦光斑半径大小和强度,消除了倍率色差.实验结果表明,通过该方法,复用透镜的轴向色差以及倍率色差都得到了有效矫正,在三色光入射下其艾里斑半径为67pixel,与具有相同焦距和分辨率的单色透镜产生的艾里斑半径65pixel接近.The scalar diffraction theory has carried on the analysis to eliminate the axial chromatic aberration and the conditions of magnification chromatism.Using the programmable control features of phase-only liquid spatial light modulator,the Fresnel lenses with three colors of red,green and blue are inlaid with blazed gratings and programmed on a liquid crystal spatial light modulator by random equal probability multiplexing.So that a common focal length of the three-color optical multiplexing lens is achieved,and the axial chromatic aberration eliminated.At the same time,through the constraint of the red,green,blue three-color light-modulated Fresnel lens aperture,the three-color light has the same size and intensity of the focal spot radius at the focal plane,and the magnification chromatic aberration is eliminated.The experimental results show that the axial chromatic aberration and the chromatic aberration of the multiplexing lens are effectively corrected by this method,at three-color light,the Airy′s radius is 67 pixels,which is close to the Airy＇s patch radius of 65 pixels produced by a monochromatic lens with the same focal length and resolution.

关 键 词：消色差透镜 空间光调制器 随机等概率 多波长复用 孔径约束 

分 类 号：O436[机械工程—光学工程]