高分辨率纯相位液晶空间光调制器的研究
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摘要
液晶空间光调制器在实时光学信息处理、光计算和光学神经网络等系统中作为基本的构造单元或关键的主动器件,在光学相关、光互连、数字图像加密、数字全息、激光波前整形等领域有着广泛的应用。随着全息存储、全息显示等光信息技术的不断发展,为提高系统的信息处理能力,对纯相位液晶空间光调制器的分辨率提出了较高的要求。本文以此为出发点,从以下几个方面进行了研究:
简单介绍了液晶空间光调制器的发展及研究现状,从琼斯矩阵理论,液晶电光特性及薄膜场效应晶体管扭曲向列型液晶屏结构及寻址特点等方面分析了电寻址液晶空间光调制器实现振幅及相位调制的基本原理。
根据所选用的高分辨率液晶屏的驱动结构和电光调制特性,在实验室原来设计的SVGA液晶空间光调制器基础上,保留其单片机控制模块和视频信号处理模块,重新设计视频信号驱动电路和时钟发生电路,同时调整寄存器参数设置,以适合高分辨率液晶屏的驱动条件。
运用马赫曾德干涉仪对设计完成的高分辨率液晶空间光调制器进行相位调制特性和幅度调制特性测量。首先介绍测量光路和通过干涉图进行相位测量的方法,然后通过调整偏振片的取向,找出最大相位调制状态,在这种状态下对强度调制量进行测试,看是否满足纯相位调制的要求,对所测数据处理,绘制出调制器的相位和强度调制特性曲线。
将所设计的高分辨空间光调制器作为相移器件用于数字全息实验,用相移法记录物体的率全息图并通过计算机重构,并得到了较好的结果,表明其在全息等光信息处理领域的应用价值。
As the basic blocks and the active components in real-time optical information processing, optical computing and optical neural network system, liquid crystal spatial light modulator has wide application in the optical correlation, optical interconnection, digital image encryption, digital holography, laser wave-front shaping. As holographic optical information technology continues to evolve, in order to improve the system's information processing ability, phase-only liquid crystal spatial light modulator resolution put forward a higher demand. The main points of this thesis are as follows:
A brief introduction of the liquid crystal spatial light modulator development is given. Based on the Jones matrix theory, liquid crystal electro-optical properties and thin-film field effect transistor liquid crystal display, amplitude and phase modulation of liquid crystal spatial light modulator are analyzed.
According to the drive structure and electro-optical modulation characteristics of the high-resolution LCD screen, based on the original SVGA liquid crystal spatial light modulator designed by our laboratory, retaining the SCM control module and video signal processing module, re-designing the circuit of video signal and clock signal, adjusting the register parameter settings to suit the driving conditions for high-resolution LCD screen.
Phase modulation and amplitude modulation characteristics measurements are completed by the Mach-Zehnder interferometer. First, introducing the optical path and measurement method, and then by adjusting the polarizer orientation, to find the largest state of phase modulation, in this state, intensity modulation is tested to see if it met the requirements of phase-only modulation. Processing data measured, drawing out the phase and intensity modulation curves of phase-only liquid crystal spatial light modulator.
Spatial light modulator is used in the digital holographic experiment as phase-shift device, then the high-resolution hologram picture recorded is reconstructed by computer and a clear picture of the object is gained. The result suggests that the high-resolution phase-only liquid spatial light modulator has wide value in optical information processing system.
简单介绍了液晶空间光调制器的发展及研究现状,从琼斯矩阵理论,液晶电光特性及薄膜场效应晶体管扭曲向列型液晶屏结构及寻址特点等方面分析了电寻址液晶空间光调制器实现振幅及相位调制的基本原理。
根据所选用的高分辨率液晶屏的驱动结构和电光调制特性,在实验室原来设计的SVGA液晶空间光调制器基础上,保留其单片机控制模块和视频信号处理模块,重新设计视频信号驱动电路和时钟发生电路,同时调整寄存器参数设置,以适合高分辨率液晶屏的驱动条件。
运用马赫曾德干涉仪对设计完成的高分辨率液晶空间光调制器进行相位调制特性和幅度调制特性测量。首先介绍测量光路和通过干涉图进行相位测量的方法,然后通过调整偏振片的取向,找出最大相位调制状态,在这种状态下对强度调制量进行测试,看是否满足纯相位调制的要求,对所测数据处理,绘制出调制器的相位和强度调制特性曲线。
将所设计的高分辨空间光调制器作为相移器件用于数字全息实验,用相移法记录物体的率全息图并通过计算机重构,并得到了较好的结果,表明其在全息等光信息处理领域的应用价值。
As the basic blocks and the active components in real-time optical information processing, optical computing and optical neural network system, liquid crystal spatial light modulator has wide application in the optical correlation, optical interconnection, digital image encryption, digital holography, laser wave-front shaping. As holographic optical information technology continues to evolve, in order to improve the system's information processing ability, phase-only liquid crystal spatial light modulator resolution put forward a higher demand. The main points of this thesis are as follows:
A brief introduction of the liquid crystal spatial light modulator development is given. Based on the Jones matrix theory, liquid crystal electro-optical properties and thin-film field effect transistor liquid crystal display, amplitude and phase modulation of liquid crystal spatial light modulator are analyzed.
According to the drive structure and electro-optical modulation characteristics of the high-resolution LCD screen, based on the original SVGA liquid crystal spatial light modulator designed by our laboratory, retaining the SCM control module and video signal processing module, re-designing the circuit of video signal and clock signal, adjusting the register parameter settings to suit the driving conditions for high-resolution LCD screen.
Phase modulation and amplitude modulation characteristics measurements are completed by the Mach-Zehnder interferometer. First, introducing the optical path and measurement method, and then by adjusting the polarizer orientation, to find the largest state of phase modulation, in this state, intensity modulation is tested to see if it met the requirements of phase-only modulation. Processing data measured, drawing out the phase and intensity modulation curves of phase-only liquid crystal spatial light modulator.
Spatial light modulator is used in the digital holographic experiment as phase-shift device, then the high-resolution hologram picture recorded is reconstructed by computer and a clear picture of the object is gained. The result suggests that the high-resolution phase-only liquid spatial light modulator has wide value in optical information processing system.
引文
[1]T.H.Barnes et al.The application of phase-only filters to optical interconnects and pattern recognition[J].J.Mordern Opt.1990,37:1848-1863.
[2]Gang.CH,Guofan.J,Minxian.Wu et al.Using liquid crystal spatial light modulators for realizing digital fiters in an incoherent correlator[J].SPIEE:1998,3297:99-104.
[3]P.S.Erbach,D.A.Gregory,J.B.Hanmmock.Phase-only joint-transform correlator:analysis and experimental results[J].App.Opt.1996,35(17):3091.
[4]abastida.I,Carnicer.A,Martin-Badosa.E.Optical correlation by use of partial phase-only modulation with VGA liquid-crystal displays[J].Appl.Opt.2000,39:766-769.
[5]Kilpatrick R E,Gilby J H,Day S E and Selviah D R.Liquid crystal television for use as spatial light modulators in a complex optical correlator[J].Proc.SPIE.1998,93:3386:70-77.
[6]王新久.液晶光学和液晶显示[M].北京:科学出版社,2006.
[7]N.Konforti,E.Marom,S.T.Wu.Phase-only modulation with Twisted nematic liquid crystal spatial light modulation[J].Optics Letters,1988,13(3):251-254.
[8]Kanghua Lu,Bahaa E.A.Saleh.Theory and design of the liquid crystal TV as an optical spatial phase modulator[J].Opt.Eng.,1990,29(3):240-246.
[9]J.L.Pezzaniti,R.A.Chipman.Phase-only modulation of a twisted nematic liquid crystal TV by use of the eigepolariztion states[J].Optics letters.1993,18(18):1567-1569.
[10]Jeffey A.Davis,Ignacio Moreno,Philbert Tsai.Polarization eigenstates for twisted nematic liquid crystal displays[J].Applied optics.1998,37(5):937-945.
[11]J.A.Davis,Philbert Tsai et al.Transmission variation in liquid crystal light modulation caused by interference and diffractioneffects[J].Opt.Eng.1999,38(6):1015-1057.
[12]胡晓改,薛唯.液晶纯相位空间光调制器[J].激光与光电子学进展.2001,12:35-42.
[13]刘国林.液晶纯相位空间光调制器的研究[D].北京:北京理工研究生院,2000.
[14]胡文华,李修建,杨建坤,等.光寻址空间光调制器控制系统的设计与实现[J].光学与光电技术,2007,5(2):62-64.
[15]Yun Zhisheng,Li Yulin,Liu Jifang et al.Phase-only modulation with a spatial light modulator controlled by writing light intensity[J].Optics Communications,1997,139:232-236.
[16]宋成禹.电寻址空间光调制技术的研究[D].长春:中国科学院长春光学精密机械与物理研究所,2002.
[17]李方红.高效率电寻址位相型液晶空间光调制系统及其在光电混合信息处理中的若干应用研究.[D]浙江:浙江大学研究生院,2000.
[18]Min-Gyu Kim,Jung-Sik Koo,Eun-Soo Kim.Modification of Commercial LCD Video Projector for High-Resolution Spatial Light Modulator[J].SPIE.2003,5005:145-14.
[19]李育林,傅晓理著.液晶空间光调制器及其应用[M].国防工业出版社.1996.
[20]安毓英,刘继芳,李庆辉.光电子技术[M].北京:电子工业出版社,2004.
[21]余虹主编.大学物理学[M].北京:科学出版社,2001.
[22]杨虹.TFT-LCD驱动技术的研究[D].长春:中科学院长春光学精密机械与物理研究所,2000.
[23]刘静.扭曲向列液晶纯相位空间光调制器[D].大连:大连理工大学研究生院,2007.
[24]李冰.纯相位液晶空间光调制器的研究[D].大连:大连理工大学研究生院,2007.
[25]Protel DXP 2004电路设计与制版实用教程[M].王振营,李满,杨君等.北京:中国铁道出版社,2006.3.
[26]于京,张景璐.51系列单片机C程序设计与应用案例[M].北京:中国电力出版社,2006.
[27]马忠梅,籍顺心,张凯,马岩.单片机的C语言应用程序设计[M].北京:北京航空航天大学出版社,2005.
[28]胡汉才.单片机原理及接口技术[M].北京:清华大学出版社,2003.
[29]Andres Marquez,Makoto Yamauchi,Jeffrey A.Davis et al.Phase measurements of a twisted nematic liquid crystal spatial light modulator with a common-path interferimeter[J].Optics Communications,2001,190:129-133.
[30]徐鹏.液晶空间光调制器光调制特性测量及其在光学图像处理中的应用研究[D].济南:山东大学研究生院,2005.
[31]Hongxin Zhang,Jian Zhang,Liying Wu.Evaiuation of phase-only liquid crystal spatial light modulator for phase modulation performance using a Twyman-Green interferometer[J].Measurement Science and Technology,2007,18:1724-1728.
[32]K.A.Goldberg,J.Bokor.Fourier-transform method of phase-shift determination[J].App.Opt.2001,40:2886-2894.
[33]C.Roddier,F.Roddier.Interferogram analysis using fourier transform techniques[J].App.Opt.1987,26:1668-1673.
[34]C.S.Guo,Z.Y Rong,J.L He,et al.Determination of global phase shifts between interferograms using energy minimum algorithm techniques[J].Appl.Opt.2003,42(32):514-651.
[35]骆海军.相位型空间光调制器的研究[D].大连:大连理工大学研究生院,2009.
[36]苏显渝,李继陶.信息光学[M].北京:科学出版社,1999.
[37]U.Schnars,W.Juptner.Direct recording of holograms by a CCD target and numerical reconstruction[J].App.Opt,2003,33(2):179-181.
[38]李海英.数字全息再现像分辨率的研究[D].大连:大连理工大学研究生院,2009.
[39]Ulf Schnars,Werner Jueptner.Digital recording and numerical reconstruction of holograms[J].Meas.Sci.Technologe,2003,13(2002):85-101.
[40]马腾.合成孔径技术提高数字全息再现像质量的研究[D].大连:大连理工大学研究生院,2009.
[41]菜履中.相移干涉术及广义相移数字全息干涉术[J].大学物理,2008,27(9):43-44.
[42]甄艳坤.单次相移数字全息术的研究[D].西安:陕西师范大学,2004.
[43]黎上芩.提高菲涅尔数字全息再现像质量的研究[D].大连:大连理工大学研究生院,2009.
[2]Gang.CH,Guofan.J,Minxian.Wu et al.Using liquid crystal spatial light modulators for realizing digital fiters in an incoherent correlator[J].SPIEE:1998,3297:99-104.
[3]P.S.Erbach,D.A.Gregory,J.B.Hanmmock.Phase-only joint-transform correlator:analysis and experimental results[J].App.Opt.1996,35(17):3091.
[4]abastida.I,Carnicer.A,Martin-Badosa.E.Optical correlation by use of partial phase-only modulation with VGA liquid-crystal displays[J].Appl.Opt.2000,39:766-769.
[5]Kilpatrick R E,Gilby J H,Day S E and Selviah D R.Liquid crystal television for use as spatial light modulators in a complex optical correlator[J].Proc.SPIE.1998,93:3386:70-77.
[6]王新久.液晶光学和液晶显示[M].北京:科学出版社,2006.
[7]N.Konforti,E.Marom,S.T.Wu.Phase-only modulation with Twisted nematic liquid crystal spatial light modulation[J].Optics Letters,1988,13(3):251-254.
[8]Kanghua Lu,Bahaa E.A.Saleh.Theory and design of the liquid crystal TV as an optical spatial phase modulator[J].Opt.Eng.,1990,29(3):240-246.
[9]J.L.Pezzaniti,R.A.Chipman.Phase-only modulation of a twisted nematic liquid crystal TV by use of the eigepolariztion states[J].Optics letters.1993,18(18):1567-1569.
[10]Jeffey A.Davis,Ignacio Moreno,Philbert Tsai.Polarization eigenstates for twisted nematic liquid crystal displays[J].Applied optics.1998,37(5):937-945.
[11]J.A.Davis,Philbert Tsai et al.Transmission variation in liquid crystal light modulation caused by interference and diffractioneffects[J].Opt.Eng.1999,38(6):1015-1057.
[12]胡晓改,薛唯.液晶纯相位空间光调制器[J].激光与光电子学进展.2001,12:35-42.
[13]刘国林.液晶纯相位空间光调制器的研究[D].北京:北京理工研究生院,2000.
[14]胡文华,李修建,杨建坤,等.光寻址空间光调制器控制系统的设计与实现[J].光学与光电技术,2007,5(2):62-64.
[15]Yun Zhisheng,Li Yulin,Liu Jifang et al.Phase-only modulation with a spatial light modulator controlled by writing light intensity[J].Optics Communications,1997,139:232-236.
[16]宋成禹.电寻址空间光调制技术的研究[D].长春:中国科学院长春光学精密机械与物理研究所,2002.
[17]李方红.高效率电寻址位相型液晶空间光调制系统及其在光电混合信息处理中的若干应用研究.[D]浙江:浙江大学研究生院,2000.
[18]Min-Gyu Kim,Jung-Sik Koo,Eun-Soo Kim.Modification of Commercial LCD Video Projector for High-Resolution Spatial Light Modulator[J].SPIE.2003,5005:145-14.
[19]李育林,傅晓理著.液晶空间光调制器及其应用[M].国防工业出版社.1996.
[20]安毓英,刘继芳,李庆辉.光电子技术[M].北京:电子工业出版社,2004.
[21]余虹主编.大学物理学[M].北京:科学出版社,2001.
[22]杨虹.TFT-LCD驱动技术的研究[D].长春:中科学院长春光学精密机械与物理研究所,2000.
[23]刘静.扭曲向列液晶纯相位空间光调制器[D].大连:大连理工大学研究生院,2007.
[24]李冰.纯相位液晶空间光调制器的研究[D].大连:大连理工大学研究生院,2007.
[25]Protel DXP 2004电路设计与制版实用教程[M].王振营,李满,杨君等.北京:中国铁道出版社,2006.3.
[26]于京,张景璐.51系列单片机C程序设计与应用案例[M].北京:中国电力出版社,2006.
[27]马忠梅,籍顺心,张凯,马岩.单片机的C语言应用程序设计[M].北京:北京航空航天大学出版社,2005.
[28]胡汉才.单片机原理及接口技术[M].北京:清华大学出版社,2003.
[29]Andres Marquez,Makoto Yamauchi,Jeffrey A.Davis et al.Phase measurements of a twisted nematic liquid crystal spatial light modulator with a common-path interferimeter[J].Optics Communications,2001,190:129-133.
[30]徐鹏.液晶空间光调制器光调制特性测量及其在光学图像处理中的应用研究[D].济南:山东大学研究生院,2005.
[31]Hongxin Zhang,Jian Zhang,Liying Wu.Evaiuation of phase-only liquid crystal spatial light modulator for phase modulation performance using a Twyman-Green interferometer[J].Measurement Science and Technology,2007,18:1724-1728.
[32]K.A.Goldberg,J.Bokor.Fourier-transform method of phase-shift determination[J].App.Opt.2001,40:2886-2894.
[33]C.Roddier,F.Roddier.Interferogram analysis using fourier transform techniques[J].App.Opt.1987,26:1668-1673.
[34]C.S.Guo,Z.Y Rong,J.L He,et al.Determination of global phase shifts between interferograms using energy minimum algorithm techniques[J].Appl.Opt.2003,42(32):514-651.
[35]骆海军.相位型空间光调制器的研究[D].大连:大连理工大学研究生院,2009.
[36]苏显渝,李继陶.信息光学[M].北京:科学出版社,1999.
[37]U.Schnars,W.Juptner.Direct recording of holograms by a CCD target and numerical reconstruction[J].App.Opt,2003,33(2):179-181.
[38]李海英.数字全息再现像分辨率的研究[D].大连:大连理工大学研究生院,2009.
[39]Ulf Schnars,Werner Jueptner.Digital recording and numerical reconstruction of holograms[J].Meas.Sci.Technologe,2003,13(2002):85-101.
[40]马腾.合成孔径技术提高数字全息再现像质量的研究[D].大连:大连理工大学研究生院,2009.
[41]菜履中.相移干涉术及广义相移数字全息干涉术[J].大学物理,2008,27(9):43-44.
[42]甄艳坤.单次相移数字全息术的研究[D].西安:陕西师范大学,2004.
[43]黎上芩.提高菲涅尔数字全息再现像质量的研究[D].大连:大连理工大学研究生院,2009.