折反式2f系统光学相关器的研究
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摘要
为进一步缩小光学相关器体积,设计了一种折反式2f系统光学相关器,光路采用折叠反射式结构,用数字微透镜取代传统相关器中的实体透镜,缩减了结构体积,提升了系统集成度。利用等效光路法对其进行理论分析,给出了折反式2f相关器的结构设计条件及结构参数。针对该相关器,设计了与之匹配的综合鉴别函数滤波器,利用自编程序进行模拟仿真分析。结果显示,当待识别目标发生缩放与旋转畸变时,该相关器仍具有较好的畸变不变识别性能。
In order to further reduce the volume of optical correlator,an optical correlator for folding reflective 2f system is designed.The optical path adopts folding reflective structure.Digital micro lens replaces physical lens in the traditional correlator to reduce the volume of the structure and improve the system integration.The structural design conditions and structural parameters of the folding reflective 2f correlator are given theoretically based on equivalent optical path method.The optimal trade-off share duplexed filter(SDF)is designed for the correlator,and the simulation analysis is performed by a self-compiled program.Simulation results indicate that the correlator still has good distortion invariant recognition performance when the target is subject to scaling and rotation distortion.
In order to further reduce the volume of optical correlator,an optical correlator for folding reflective 2f system is designed.The optical path adopts folding reflective structure.Digital micro lens replaces physical lens in the traditional correlator to reduce the volume of the structure and improve the system integration.The structural design conditions and structural parameters of the folding reflective 2f correlator are given theoretically based on equivalent optical path method.The optimal trade-off share duplexed filter(SDF)is designed for the correlator,and the simulation analysis is performed by a self-compiled program.Simulation results indicate that the correlator still has good distortion invariant recognition performance when the target is subject to scaling and rotation distortion.
引文
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[29]Zhou L,Yu J,Yang T,et al.Analysis and experimental determination for matched filtering recognition of correlation peak[J].Acta Optica Sinica,2016,36(9):0907001.周亮,喻珺,杨拓,等.匹配滤波识别相关峰的分析与实验判别[J].光学学报,2016,36(9):0907001.
[2]Manzur T,Zeller J,Serati S.Optical correlator based target detection,recognition,classification,and tracking[J].Applied Optics,2012,51(21):4976-4983.
[3]Elbouz M,Alfalou A,Brosseau C,et al.Assessing the performance of a motion tracking system based on optical joint transform correlation[J].Optics Communications,2015,349:65-82.
[4]Solus D,Ovsenik L,Turán J.Optical correlator in vertical traffic signs inventory system[C].IEEE 13th International Scientific Conference on Informatics,2016:15701280.
[5]Harasthy T,Ovsenik L,Turán J.Current summary of the practical using of optical correlators[J].Acta Electrotechnica et Informatica,2013,12(4):30-38.
[6]Callaghan M J,Perlmutter S H,Wolt B.Single-chip correlator implementation for PCI-bus personal computers[C].SPIE,2000,4043:48-58.
[7]Liu W Y,Zhang Y M,Dong S H,et al.Novel compact optical correlator and optimum design of match spatial filter for pattern recognition[J].Acta Optica Sinica,2000,20(12):1680-1683.刘文耀,张以谟,董世洪,等.集成化光学相关器及匹配滤波器的优化设计[J].光学学报,2000,20(12):1680-1683.
[8]Eckert W.Compact planar-integrated optical correlator for spatially incoherent signals[J].Applied Optics,2000,39(5):759-765.
[9]Liu J Y,Xu P,Xu H D,et al.Design and analysis of novel planar integrated optical correlator[J].Acta Optica Sinica,2008,28(9):1735-1739.刘加勇,徐平,徐海东,等.新型平面集成光学相关器设计与分析[J].光学学报,2008,28(9):1735-1739.
[10]Xu H D,Xu P,Qi S L,et al.System optimization of4f-based planar integrated hybrid optoelectronic correlator[J].Acta Optica Sinica,2010,30(4):1002-1008.徐海东,徐平,亓森林,等.基于4f结构平面集成相关器系统优化[J].光学学报,2010,30(4):1002-1008.
[11]Eckert W.Compact discrete correlator with improved design[J].Optics Communications,2000,186(1):83-86.
[12]Fukuchi N.Lensless Vanderlugt optical correlator using two phase-only spatial light modulators[J].Chinese Optics Letters,2009,7(12):1131-1133.
[13]Zeng X,Inoue T,Fukuchi N,et al.Parallel lensless optical correlator based on two phase-only spatial light modulators[J].Optics Express,2011,19(13):12594-12604.
[14]Zeng X,Bai J,Hou C,et al.Compact optical correlator based on one phase-only spatial light modulator[J].Optics Letters,2011,36(8):1383-1385.
[15]Wu W.Research of 2f hybrid photoelectric matched filtering correlation recognition[J].Optical Technique,2010,36(1):39-42.
[16]Refregier P.Optimal trade-off filters for noise robustness,sharpness of the correlation peak and Horner efficiency[J].Optics Letters,1991,16(11):829-831.
[17]Hester C F,Casasent D.Multivariant technique for multiclass pattern recognition[J].Applied Optics,1980,19(11):1758-1761.
[18]Kumar B.Minimum variance synthetic discriminant functions[J].Journal of the Optical Society of America A,1986,3(10):1579-1584.
[19]Mahalanobis A,Kumar B,Casasent D.Minimum average correlation energy filters[J].Applied Optics,1987,26(17):3633-3640.
[20]Mahalanobis A,Kumar B.Unconstrained correlation filters[J].Applied Optics,1994,33(17):3751-3759.
[21]Wu W,Zhou J P,Wang X S,et al.Design of matched filters for image correlation recognition of distortion targets[J].Journal of Applied Optics,2009,30(1):11-15.
[22]Xu P,Hong C,Cheng G,et al.Planar optical correlators integrated with binary optical lens[J].Optics Express,2015,23(5):6773-6779.
[23]Xu P,Yuan X,Huang H X,et al.Research on design of tri-color shift device[J].Nanoscale Research Letters,2016,11(1):485.
[24]Xu P,Huang Y Y,Su Z J,et al.Research of microprism distribution on the bottom surface of the smallsize integrated light guide plate[J].Optics Express,2015,23(4):4887-4896.
[25]Huang H X,Ruan S C,Yang T,et al.Novel even beam splitters based on subwavelength binary simple periodic rectangular structure[J].Nano-Micro Letters,2015,7(2):177-182.
[26]Xu P,Huang Y Y,Zhang X L,et al.Integrated micro-optical light guide plate[J].Optics Express,2013,21(17):20159-20170.
[27]Xu P,Huang H X,Wang K,et al.Realization of optical perfect shuffle with microoptical array element[J].Optics Express,2007,15(3):809-816.
[28]Testorf M,Jahns J.Paraxial theory of planar integrated systems[J].Journal of the Optical Society of America A,1997,14(7):1569-1575.
[29]Zhou L,Yu J,Yang T,et al.Analysis and experimental determination for matched filtering recognition of correlation peak[J].Acta Optica Sinica,2016,36(9):0907001.周亮,喻珺,杨拓,等.匹配滤波识别相关峰的分析与实验判别[J].光学学报,2016,36(9):0907001.